TAP & DIE PRICE LIST INDEX

TAP & DIE PRICE LIST INDEX ANPT Die Page 4 BA Die Page 4 BA Tap Page 17 BSF Tap Page 19 BSB Die Page 4 BSB Tap Page 17 BSCY Tap Page 17 BSF Die Page 3 BSP Die Page 4 BSP Tap Page 18 BSPT Die Page 4 BSPT Tap Page 18 BSW Die Page 3 BSW Tap Page 19 ME Die Page 4 ME Tap Page 17 Metric Die Page 5 Metric Tap Page 21 Metric Tap Over Size Page 27 NPS Tap Page 18 NPSF Tap Page 18 NPT Tap Page 18 NPTF Tap Page 18 PG Tap Page 18 Trapezoidal Tap Page 29 UNC Tap Page 28 UNC Die Page 7 UNS Die Page 3 UNEF Tap Page 29 UNF Die Page 8 UNF Tap Page 28 Rotagrip Ltd 16-20 Lodge Road Hockley Birmingham B18 5PN UK Tel 0044 121 551 1566 Fax 0044 121 523 9188 Email rotagrip@blueyonder.co.uk

DIES & DIE NUTS DIES are usually round and are used for cutting external threads. They can be held in a Die Stock for hand operation or in a Die Holder for use by machine. Dies are usually split which enables adjustment for precision, and also to extend the life of the die as it wears. They can also be solid which makes them fixed. Taper thread dies (NPT, BSPT) are usually solid. The lead at the front (etched) face is normally 3 pitches, for standard threading, and 2 pitches at the back face for closer threading, or soft materials. DIE NUTS are hexagonal, for turning with a wrench or spanner, and are usually used for repairing damaged threads. Many of the practices employed in tapping also apply to threading with dies. If you do encounter problems the following may help:- TROUBLESHOOTING DIE BREAKS WORK PIECE DIAMETER TOO BIG SPEED TOO HIGH DIE MISALIGNED WORK PIECE NOT CHAMPHERED DIE OVER-ADJUSTED DIE WEARS QUICKLY WRONG RAKE ANGLE FOR MATERIAL SPEED TOO HIGH INCORRECT FEED RATE POOR FINISH (ONE FLANK) INCORRECT FEED RATE POOR FINISH (BOTH FLANKS) CLEARANCE HOLES BLOCKED BAR DIAMETER TOO BIG SPEED TOO LOW WORK PIECE NOT CHAMPHERED INCORRECT OR LACK OF LUBRICANT WRONG RAKE ANGLE FOR MATERIAL COLD WELDING WORK PIECE DIAMETER TOO BIG SPEED TOO LOW INCORRECT OR LACK OF LUBRICANT WRONG RAKE ANGLE FOR MATERIAL CLEARANCE HOLES BLOCKED THREAD UNDERSIZE DIE MISALIGNED SPEED TOO LOW INCORRECT OR LACK OF LUBRICANT THREAD OVERSIZE PULLING OFF TOO HARD DIE CHIPPING CLEARANCE HOLES BLOCKED WORK PIECE NOT CHAMPHERED BAR DIAMETER TOO BIG SPEED TOO HIGH

8 UNS DIENUTS THREAD STOCK DIENUT RH CODE MATERIAL DIENUT 1.1/8.8 D2400H HSS 35.00 1.1/4.8 D2405H CS 25.20 1.3/8.8 D2410H CS 32.20 1.1/2.8 D2415H CS 36.40 1.5/8.8 D2420H CS 52.50 1.3/4.8 D2425H CS 59.50 2"8 D2435H CS 84.00 Forged steel Diestocks also available. HSS BSW DIES & DIENUTS THREAD STOCK DIE RH LH RH (BSW) CODE DIAMETER DIE DIE DIENUT 1/8.40 D3010 13/16" 8.98 16.00 3/16.24 D3020 13/16" 8.98 12.86 7/32.24 D3025 13/16" 12.31 1/4.20 D3030 13/16" 7.37 14.39 8.08 1/4.20 D3030 1" 8.49 5/16.18 D3040 1" 8.49 9.66 3/8.16 D3045 1" 8.49 11.22 7/16.14 D3050 1.5/16" 12.61 15.45 1/2.12 D3055 1.5/16" 12.61 13.76 9/16.12 D3060 1.5/16" 15.56 16.98 5/8.11 D3065 1.1/2" 15.10 16.98 3/4.10 D3075 1.1/2" 20.04 20.88 7/8.9 D3085 2" 28.20 1"8 D3095 2" 28.20 34.81 1.1/4.7 D3105 3" 48.37 57.79 1.3/8.6 D3110 3" 57.80 78.43 1.1/2.6 D3115 3" 57.80 76.09 1.3/4.5 D3125 4" 83.83 93.17 HSS BSF DIES & DIENUTS THREAD STOCK DIE RH LH RH (BSF) CODE DIAMETER DIE DIE DIENUT 3/16.32 D3200 13/16" 8.63 12.37 1/4.26 D3205 13/16" 6.93 13.84 7.77 5/16.22 D3210 1" 8.17 9.32 3/8.20 D3215 1" 8.17 16.33 10.79 7/16.18 D3220 1.5/16" 12.16 14.86 1/2.16 D3225 1.5/16" 12.16 24.28 13.23 9/16.16 D3230 1.5/16" 14.99 16.33 5/8.14 D3235 1.1/2" 14.51 16.33 3/4.12 D3245 2" 31.10 7/8.11 D3255 2" 31.10 1"10 D3260 2" 31.10 33.47 1.1/8.9 D3265 3" 46.52 45.36 1.1/4.9 D3270 3" 46.52 55.57 1.3/8.8 D3275 3" 55.57 75.41 All prices subject to the addition of carriage and V.A.T.

HSS BRITISH ASSOCIATION (BA) DIES & DIENUTS NUMBER STOCK DIE RH LH RH CODE DIAMETER DIE DIE DIENUT 10 D3508 13/16" 14.99 9 D3510 13/16" 14.99 8 D3515 13/16" 12.60 7 D3520 13/16" 12.60 6 D3525 13/16" 9.43 18.76 20.19 5 D3535 13/16" 9.25 20.19 4 D3540 13/16" 9.43 20.19 3 D3545 13/16" 12.60 2 D3550 13/16" 9.43 17.14 1 D3555 13/16" 12.60 20.19 0 D3560 13/16" 9.43 17.14 HSS BRASS THREAD (BSB) DIES HSS MODEL ENG (ME) DIES THREAD STOCK DIE RH THREAD STOCK DIE RH (BSB) CODE DIAMETER DIE (ME) CODE DIAMETER DIE 5/16.26 D3400 1" 10.55 1/4.40 D3615 13/16" 17.40 3/8.26 D3405 1" 10.55 5/16.40 D3630 1" 19.27 7/16.26 D3410 1.5/16" 16.28 5/16.32 D3625 1" 19.27 1/2.26 D3415 1.5/16" 16.28 3/8.32 D3635 1" 19.27 5/8.26 D3425 1.1/2" 19.85 3/4.26 D3430 2" 29.22 Please enquire for non listed items BSP(F) DIES & DIENUTS THREAD STOCK DIE RH RH (BSP) CODE DIAMETER DIE DIENUT 1/8.28 D5055 1" 7.04 9.37 1/4.19 D5060 1.5/16" 10.55 11.53 3/8.19 D5065 1.1/2" 12.60 14.12 1/2.14 D5070 1.1/2" 14.39 19.95 5/8.14 D5075 2" 23.55 29.22 3/4.14 D5080 2" 23.55 39.69 1"11 D5100 3" 40.55 57.28 1.1/4.11 D5105 3" 40.55 70.88 1.1/2.11 D5110 3" 95.84 86.76 ANPT DIES & DIENUTS THREAD STOCK DIE RH RH (ANPT) CODE DIAMETER DIE DIENUT 1/8.27 D4005 1" 22.49 23.81 1/4.18 D4010 1.5/16" 32.60 32.60 3/8.18 D4015 1.1/2" 39.66 39.14 1/2.14 D4020 2" 47.93 47.93 3/4.14 D4025 2" 47.93 66.89 1"11.5 D4030 3" 108.89 98.10 1.1/4.11.5 D4035 3" 108.89 108.31 1.1/2.11.5 D4040 4" 171.26 2"11.5 D4045 4" 171.26 BSPT DIES & DIENUTS THREAD STOCK DIE RH RH (BSPT) CODE DIAMETER DIE DIENUT 1/8.28 D5005 1" 23.89 23.84 1/4.19 D5010 1.5/16" 32.60 32.60 3/8.19 D5015 1.1/2" 39.14 39.14 1/2.14 D5020 2" 47.93 47.93 3/4.14 D5030 2" 47.93 66.91 All prices subject to the addition of carriage & V.A.T.

HSS METRIC COARSE*, FINE** & SPECIAL DIES & DIENUTS THREAD STOCK DIE RH LH RH LH (MM) CODE DIAMETER DIE DIE DIENUT DIENUT 1.6x0.35* D1005 13/16" 13.53 2x0.4* D1010 13/16" 9.64 17.33 17.15 2.5x0.45* D1030 13/16" 9.64 17.15 17.15 3x0.5* D1045 13/16" 5.62 12.14 12.39 21.68 3x0.5* D1045 1" 8.52 3.5x0.35 D1055 13/16" 10.62 3.5x0.6* D1060 13/16" 7.08 4x0.5** D1065 13/16" 7.57 16.31 4x0.7* D1070 13/16" 5.62 15.44 7.14 12.50 4x0.7* D1070 1" 8.52 4x0.75 D1075 13/16" 12.12 4.5x0.5 D1080 13/16" 17.89 4.5x0.75* D1085 13/16" 7.07 16.25 5x0.5** D1090 13/16" 7.57 13.26 5x0.75 D1091 13/16" 17.89 5x0.8* D1095 13/16" 5.62 13.11 6.85 11.99 5x0.8* D1095 1" 9.10 6x0.5 D1106 13/16" 21.91 6x0.75** D1110 13/16" 7.56 9.02 6x1* D1115 13/16" 5.62 13.11 5.79 10.13 6x1* D1115 1" 6.69 7x0.5 D1116 13/16" 24.29 7x0.75 D1120 13/16" 22.85 7x1* D1125 13/16" 7.14 7x1* D1125 1" 8.78 8x0.5 D1126 1" 23.27 8x0.75** D1128 1" 12.46 8x1** D1130 1" 9.24 10.76 8x1.25* D1135 1" 6.67 18.31 6.83 11.94 8x1.25* D1135 1.5/16" 9.79 9x0.5 D1136 1" 27.78 9x0.75 D1137 1" 25.90 9x1** D1140 1" 12.67 9x1.25* D1145 1" 8.51 10x0.5 D1146 1" 32.90 10x0.75 D1150 1" 11.54 12.37 10x1** D1155 1" 8.98 12.37 10x1.25** D1160 1" 8.98 12.37 10x1.5* D1165 1" 6.67 18.29 9.79 12.74 10x1.5* D1165 1.5/16" 9.79 11x0.5 D1163 1.5/16" 32.97 11x0.75 D1167 1.5/16" 29.96 11x1 D1168 1.5/16" 28.62 11x1.25 D1169 1.5/16" 33.39 11x1.5 D1170 1.5/16" 12.00 18.76 All prices subject to the addition of carriage and V.A.T.

HSS METRIC COARSE*, FINE** & SPECIAL DIES & DIENUTS THREAD STOCK DIE RH LH RH LH (MM) CODE DIAMETER DIE DIE DIENUT DIENUT 12x0.5 D1171 1.5/16" 36.75 12x0.75 D1172 1.5/16" 32.42 12x1** D1175 1.5/16" 13.08 27.00 14.93 12x1.25** D1180 1.5/16" 13.26 14.93 12x1.5** D1185 1.5/16" 13.26 14.93 12x1.75* D1190 1.5/16" 9.79 27.00 7.98 13.97 12x1.75* D1190 1.1/2" 11.43 13x1 D1191 1.5/16" 31.96 14x0.5 D1192 1.5/16" 38.36 14x1** D1193 1.5/16" 18.34 22.47 14x1.25** D1195 1.5/16" 13.26 14x1.5** D1200 1.5/16" 13.26 18.39 14x1.5** D1200 1.1/2" 15.47 14x2* D1205 1.5/16" 12.00 10.22 14x2* D1205 1.1/2" 16.20 31.69 15x1 D1206 1.5/16" 34.20 15x1.5 D1207 1.5/16" 34.20 15x2 D1208 1.5/16" 36.04 16x0.5 D1209 1.1/2" 38.78 16x1** D1210 1.1/2" 15.47 18.39 16x1.5** D1215 1.1/2" 15.47 30.94 18.39 16x2* D1220 1.1/2" 11.43 31.68 13.18 24.29 16x2* D1220 2" 16.91 17x1 D1221 1.1/2" 38.46 18x1** D1222 1.1/2" 36.96 21.25 18x1.5** D1225 1.1/2" 15.47 22.49 18x2** D1226 1.1/2" 36.22 22.49 18x2.5* D1230 1.1/2" 14.74 16.58 18x2.5* D1230 2" 16.91 19x1 D1231 1.1/2" 40.43 20x1** D1235 1.1/2" 15.47 22.55 20x1** D1235 2" 17.33 20x1.5** D1240 1.1/2" 22.68 22.49 20x1.5** D1240 2" 26.09 20x2** D1245 1.1/2" 22.68 20x2.5* D1250 1.1/2" 14.74 13.02 32.38 20x2.5* D1250 2" 16.91 46.66 22x1 D1251 2" 41.79 22x1.5** D1255 2" 22.75 25.66 22x2** D1256 2" 27.99 22x2.5* D1260 2" 16.91 18.43 34.30 24x1 D1265 2" 52.92 37.32 24x1.5** D1270 2" 22.68 25.66 24x2** D1275 2" 22.68 24x3* D1280 2" 16.91 46.66 20.83 36.44 All prices subject to the addition of carriage and V.A.T.

HSS METRIC COARSE*, FINE** & SPECIAL DIES & DIENUTS THREAD STOCK DIE RH LH RH LH (MM) CODE DIAMETER DIE DIE DIENUT DIENUT 25x1 D1281 2" 52.92 25x1.5 D1282 2" 22.68 24.27 26x1 D1283 2" 52.43 39.38 26x1.5 D1284 2" 45.22 39.38 27x1.5 D1287 3" 54.04 60.24 27x2 D1288 3" 49.77 60.24 27x3 D1289 3" 37.12 42.74 28x1 D1290 3" 54.99 28x1.5 D1291 3" 54.99 60.24 30x1 D1293 3" 54.99 30x1.5 D1297 3" 55.48 42.92 30x2 D1300 3" 49.77 63.67 30x3.5 D1305 3" 37.12 42.74 32x1 D1306 3" 56.21 33x2 D1313 3" 68.15 33x3.5 D1315 3" 37.12 58.32 36x1.5 D1317 3" 64.68 36x3 D1319 3" 63.26 36x4 D1320 3" 37.12 61.82 39x4 D1325 3" 40.22 All prices subject to the addition of carriage and V.A.T.

WE ALSO SUPPLY.. HSS UNC DIES & DIENUTS THREAD STOCK DIE RH LH RH (UNC) CODE DIAMETER DIE DIE DIENUT 2.56 D2010 13/16" 9.94 3.48 D2015 13/16" 9.94 4.40 D2020 13/16" 7.97 5.40 D2025 13/16" 7.97 6.32 D2030 13/16" 7.97 14.54 8.32 D2035 13/16" 7.97 15.36 10.24 D2040 13/16" 7.97 15.36 12.24 D2045 13/16" 7.97 1/4.20 D2050 13/16" 6.34 16.61 7.31 1/4.20 D2050 1" 7.50 5/16.18 D2055 1" 7.50 14.98 8.63 3/8.16 D2060 1" 7.50 9.90 7/16.14 D2065 1.5/16" 10.95 13.61 1/2.13 D2070 1.5/16" 10.95 12.00 9/16.12 D2075 1.5/16" 14.85 14.77 5/8.11 D2080 1.1/2" 12.86 25.73 14.77 5/8.11 D2080 2" 19.05 3/4.10 D2085 1.1/2" 12.86 18.15 7/8.9 D2090 2" 19.05 20.81 1"8 D2095 2" 19.05 30.00 1.1/8.7 D2100 3" 41.60 1.1/4.7 D2105 3" 41.60 1.3/8.6 D2110 3" 41.60 1.1/2.6 D2115 3" 41.60 61.82 HSS UNF DIES & DIENUTS THREAD STOCK DIE RH LH RH (UNF) CODE DIAMETER DIE DIE DIENUT 0.80 D2200 13/16" 11.20 2.64 D2210 13/16" 11.20 3.56 D2215 13/16" 11.20 4.48 D2220 13/16" 8.98 14.35 6.40 D2230 13/16" 8.98 8.36 D2235 13/16" 8.98 15.36 10.32 D2240 13/16" 8.98 15.12 14.81 12.28 D2245 13/16" 8.98 15.36 1/4.28 D2250 13/16" 7.12 10.32 8.24 1/4.28 D2250 1" 8.44 5/16.24 D2255 1" 8.44 9.71 3/8.24 D2260 1" 8.44 19.62 11.16 7/16.20 D2265 1" 9.57 16.87 1/2.20 D2270 1.5/16" 12.32 31.41 13.49 9/16.18 D2275 1.5/16" 12.32 5/8.18 D2280 1.1/2" 14.46 16.64 3/4.16 D2285 1.1/2" 14.46 20.41 7/8.14 D2290 2" 21.37 21.49 1"12 D2295 2" 21.37 1.1/8.12 D2300 3" 46.49 1.1/4.12 D2305 3" 46.49 47.82 1.3/8.12 D2310 3" 46.49 1.1/2.12 D2315 3" 46.49 69.21 All prices subject to the addition of carriage and V.A.T.

Types of Tap HAND TAPS These are straight flute general purpose tools which can be used for both machine or hand tapping. They are generally the most economical tool for use on production runs, but are best on materials that produce chips, or where the swarf breaks readily. Where deep holes are to be tapped, in materials which produce stringy swarf, other types of taps may be needed, especially for coarse threads. Hand taps can be supplied in sets of three; bottom, second and taper leads, or individually. BOTTOM TAPS have a chamfer (lead) of 1 2 threads, the angle of the lead being around 18 degrees per side. They are used to produce threads close to the bottom of blind holes. SECOND TAPS have a lead of 3-5 threads at 8 degrees per side. They are the most popular and can be used for through holes, or blind holes where the thread does not need to go right to the bottom. TAPER TAPS have a lead of 7-10 threads at 5 degrees per side. The taper lead distributes the cutting force over a large area, and the taper shape helps the thread to start. They can therefore be used to start a thread prior to use of second or bottom leads, or for through holes. IMPORTANT NOTE ON TERMINOLOGY! In the U.K. bottom taps are often referred to as plugs. In North America second taps are often referred to as plugs! This can easily lead to confusion. To avoid problems when ordering it is best to use the terms bottom, second and taper. Another variation is that second taps are sometimes referred to as intermediate, and taper taps can be called firsts. MACHINE TAPS Machine taps are so called because they are designed to be run at higher speeds, and need less cutting power than hand taps. SPIRAL POINT Also known as gun nose or bull nose or chipdriver. These taps are dimensionally the same as a hand tap, second lead, but have the cutting face ground back relative to the axis of the tap, for the lead portion. This gives the flute a better cutting action, requiring less power, and pushes the cut material forward, allowing free flow of coolant along the flutes to the cutting edge. The flutes are not ground as deeply as for hand taps, giving the tap greater strength. It can therefore be run at higher speeds. Spiral point taps are ideal for machine tapping of through holes, or blind holes where there is enough clearance beyond the threaded portion to accommodate the swarf. SPIRAL FLUTE These taps are used to produce a thread close to the bottom of a blind hole and therefore have a very short lead. The right hand spiral cut of the flutes acts to force the swarf away from the cutting teeth to the rear of the flutes and out of the hole. They are better on materials which form long continuous stringy swarf, rather than chips.

They are also better to tap a thread in a hole where there is a break in the material, e.g. another hole, as the spiral fluting helps the tap to pick up on the other side. Spiral flute taps can have slow or fast helix angles. Slow spirals are used for non ferrous materials, and fast spirals for most other materials. We supply fast spiral as standard. FLUTELESS Otherwise known as Roll, Forming or Polygon taps. Used for the chipless production of threads in ductile materials such as copper, aluminium or soft brass. As the name implies they do not have flutes but lobes, which contact the work piece to form the thread by extrusion. They are operated at high speeds and are better at maintaining size. As long as all of the correct operating criteria are met, i.e. speed, hole size and lubrication, they have a longer life and less breakages than with other types of machine taps. Because they produce no chips they are very suitable for blind hole tapping. Fluteless taps require different tapping drill sizes and higher operating speeds than conventional taps, see later. They also produce stronger threads. LONG SHANK TAPS MACHINE NUT (BS949) These taps were designed for tapping nuts on machines, and have a long thread, shank and square length. The shank diameter is reduced below the thread minor diameter to enable the tap to run through the work piece. This was originally to allow nuts to collect on the shank. For nut production, taper leads were used to distribute the cutting action, but these taps are now generally used as long reach, and are supplied also in bottom and second leads. DIN 376 and 374 These are European standard taps that are dimensionally different to the standard ISO 529 UK types. They are generally longer and have reduced shanks as do Nut Taps. Basically DIN 376 are for standard coarse threads, and DIN 374 for fine threads. A third type DIN 371 is available. These have bigger shanks, so are not really classed as long reach. All of these taps are available in the same types as ISO 529, see previous pages. DIN 376 STRAIGHT FLUTE DIN 376 SPIRAL POINT (nitrided) DIN 376 SPIRAL FLUTE PIPE TAPS We supply BSP, BSPT and ANP taps to BS 949.

OTHER TYPES There are many other types of tap available, such as interrupted thread, series, tandem etc, but these are normally for special applications. We would advise you on enquiry should you require anything other than the standard forms listed here. We do stock some taps other than normal standards, as you can see below:- TRAPEZOIDAL TAP SURFACE COATINGS While selecting the correct type of tap for a job, the material to be tapped should also be considered. This may determine the surface coating that should be applied to the tap in order to extend its life. Most taps are supplied with no surface treatment. They are referred to as Bright Finish. These taps are mainly for use on non-ferrous materials, or steels that do not cold weld. Bright finish taps are therefore suitable for all hand operations, where speeds are too low for cold welding to occur, and for most machine operations. STEAM TEMPERING & NITRIDING. Nitriding hardens the tap s surface skin and gives a grey/black appearance. It extends tap life when used on abrasive materials such as Copper, Aluminium alloys and Plastics, but it can make the tap brittle and more prone to breakage. Steam Tempering gives a blue/black finish. It causes minute imperfections on the surface of the tap. These cause the tapping lubricant to be retained more readily, reducing friction and the possibility of cold welding. This helps the tap to cope with both mild and stainless steels. Both above processes are normally only required for Spiral point and Spiral flute taps when the work piece material requires them. These taps are known as Steam tempered and nitrided and have a blue/black finish. Titanium nitrided taps. TITANIUM NITRIDE (Tin) This is a gold coloured coating only a few microns thick which is not metallic so reduces the chance of cold welding. It is applied by vapour deposition using special purpose machines. It imparts to the tool a surface hardness of around 80-85 Rockwell. It also imparts a good abrasive resistance and subsequent decrease in friction between the tool and the work piece. This can allow tapping at higher speeds. Suitable for most stainless steels. The process can increase the price of a tap significantly. When the tap is reground the coating will be removed. This coating is more appropriate to Fluteless taps than steam tempering and nitriding. TITANIUM CARBIDE NITRIDING (TiCn) This coating is applied to the tool in the same way as Tin, and gives a silver/grey finish. It has the same qualities as Tin coating, but

more so. It is equally more expensive. Suitable for very abrasive and high tensile materials. These are the surface treatments that we can offer. We do not keep all taps with all treatments already applied on the shelf. Our price list is for bright finish, but we keep most common standard coarse thread spiral point and spiral flute taps in bright or steam tempered and nitrided, at the same price as bright. Please enquire. We would be happy to advise you the best tap and coating for your job. SPEEDS, FEEDS AND LUBRICANTS Tapping speeds are determined by many factors. The main ones are:- a) Thread pitch b) Material being tapped c) Hole depth d) Hole type, through or blind e) Depth of thread f) Lubricant quality and flow rate Tapping speeds can be calculated using:- Recommended SFM are given later. RPM = Feed speed (SFM) 0.26 x Tap OD Tapping speeds should be decreased if :- a) Lubricant is poor, or flow is restricted b) Bottom lead or Spiral flute taps are used c) Thread depth (%) increases. d) Thread pitch is coarse e) Cutting taper threads (50% normal speed) f) Cutting Acme or Trapezoidal threads (40% normal speed) Tapping speeds can be increased if:- a) Thread depth decreases b) Thread pitch is fine c) Coolant flow and quality is good d) Spiral point taps are used RECOMMENDED FEED SPEEDS AND LUBRICANTS Speeds given are for machine tapping using HSS taps, and are given in feet per minute MATERIAL FEED SPEED (SFM) LUBRICANT Aluminium 70-90 Soluble oil Aluminium alloy 50-70 Soluble, light base or lard oil Brass 60-100 Light base oil Bronze 30-40 Light base oil Copper 60-80 Light base oil Gun metal 50-60 Soluble, light base or lard oil Grey cast iron 30-60 Dry or soluble oil Alloy cast iron 15-30 Sulphur based oil Malleable iron 20-40 Soluble or sulphur based oil Magnesium alloy 50-70 Soluble oil or paraffin with lard oil Nimonic alloy 10-12 Very high pressure cutting oil Plastics 50-70 Dry, freeze spray, liquid soap

Mild steel 30-50 Sulphur based oil Carbon steel to 20-40 Sulphur based oil 4% Carbon steel to 20-30 Sulphur based oil 7% Carbon steel 7%+ 15-25 Sulphur based oil Steel alloys to 60T 15-25 Sulphur based oil Steel alloys 60T+ 10-15 Sulphur based oil Stainless steels 10-20 Sulphur based oil Tool steels 15-25 Sulphur based oil With so many variables affecting tapping speeds there may need to be some experimentation to find the ideal. A good rule is to start at the slowest speed and work up. TROUBLESHOOTING Many factors can affect the quality of a tapped thread. Some more common problems are listed along with probable causes. POOR THREAD FINISH Misalignment of tap and work piece Incorrect feed rate Chips/swarf not being cleared properly Tapping device or machine faulty Insufficient or incorrect lubricant Incorrectly ground or blunt tap Wrong tap selection EXCESSIVE TAP WEAR Wrong tap selection Blunt or incorrectly sharpened tap Insufficient or incorrect lubricant Tapping speed too high Hole work hardened TAPS BREAKING Incorrectly sharpened/blunt tap Tap hits bottom of hole Machine or tapping device faulty Wrong tap selection Incorrect or insufficient lubricant Tapping speed too high Hole work hardened Inefficient chip or swarf removal Incorrect tapping drill size OVERSIZE/BELL MOUTHED Misalignment Incorrect feed rate Incorrect tapping drill Tapping device or machine faulty Insufficient or incorrect lubricant Incorrectly ground or eccentric tap Wrong tap selection COLD WELDING Wrong material composition Blunt or incorrectly sharpened tap Insufficient or incorrect lubricant Tapping speed too high Material too soft TAP TEETH CHIPPING Incorrectly sharpened/blunt tap Tap hits bottom of hole Machine or tapping device faulty In order to minimise problems the following rules should be followed:- 1) Use a pitch controlled tapping attachment 2) Choose the correct lubricant 3) Use the correct type of tap for the job 4) Use the correct tapping drill size

5) Choose the correct speeds and feeds 6) Keep taps sharp. Regrind with a proper machine 7) Ensure accurate alignment 8) Check hardness of material, especially when changing batches 9) Ensure thread gauging is recently certified they do wear! TAP TERMINOLOGY CLASSES OF FIT AND TOLERANCES The various standards for taps give certain allowances or tolerances for manufacture. Taps are generally manufactured to take advantage of these tolerances, so that as they wear their life is extended. The closest tolerances are applied to Class 1 taps, and the most generous to Class 3. Standard, off the shelf taps are manufactured to Class 2, which applies to all taps listed in this catalogue. Classes 1 and 3 can be manufactured to order. Classes of fit apply to all thread forms:- CLASS 1 Produces tapped holes of 4H and 5H fit for Metric threads, 3B fit for American Unified threads and Close fit for Whitworth and BA threads. CLASS 2 Produces tapped holes of 6H, 4G and 5G for Metric threads, 2B for Unified threads and Medium fit for Whitworth and BA threads. CLASS 3 Produces tapped holes of 7H, 8H and 6G for Metric threads, 1B for Unified threads and Free fit for Whitworth and BA threads. Information on tolerances and fits for individual threads is available on request. TAPPING DRILL SIZES METRIC COARSE AND FINE THREADS THREAD SIZE DRILL (mm) THREAD SIZE DRILL (mm) THREAD SIZE DRILL (mm) M1x0.25 0.75 M9x0.75 8.3 M18x2 16 M1.2x0.25 0.95 M9x1 8 M18x2.5 15.5 M1.4x0.3 1.1 M9x1.25 7.8 M20x1 19 M1.6x0.35 1.25 M10x0.5 9.5 M20x1.5 18.5 M1.8x0.35 1.45 M10x0.75 9.3 M20x2 18 M2x0.4 1.6 M10x1 9 M20x2.5 17.5 M2.2x0.45 1.75 M10x1.25 8.8 M22x1 21 M2.5x0.45 2.05 M10x1.5 8.5 M22x1.5 20.5 M2.6x0.45 2.15 M11x1 10 M22x2 20 M3x0.35 2.65 M11x1.25 9.8 M22x2.5 19.5 M3x0.5 2.5 M11x1.5 9.5 M24x1 23 M3.5x0.35 3.15 M12x0.5 11.5 M24x1.5 22.5 M3.5x0.6 2.9 M12x0.75 11.3 M24x2 22 M4x0.5 3.5 M12x1 11 M24x3 21 M4x0.7 3.3 M12x1.25 10.3 M25x1.5 23.5 M4.5x0.5 4 M12x1.5 10.5 M25x2 23 M4.5x0.75 3.75 M12x1.75 10.3 M27x3 24

M5x0.5 4.5 M13x1 12 M30x3.5 26.5 M5x0.75 4.25 M14x1 13 M33x3.5 29.5 M5x0.8 4.2 M14x1.25 12.8 M36x4 32 M6x0.5 5.5 M14x1.5 12.5 M39x4 35 M6x0.75 5.25 M14x2 12 M42x4.5 37.5 M6x1 5 M15x1 14 M45x4.5 40.5 M7x0.5 6.5 M15x1.5 13.5 M48x5 43 M7x0.75 6.25 M16x1 15 M52x5 47 M7x1 6 M16x1.25 14.8 M56x5.5 50.5 M8x0.5 7.5 M16x1.5 14.5 M60x5.5 54.5 M8x0.75 7.25 M16x2 14 M64x6 58 M8x1 7 M18x1 17 M68x6 62 M8x1.25 6.8 M18x1.5 16.5 M72x6 66 To calculate tapping drill size for metric threads subtract the pitch from the major diameter, Select the next larger standard drill size. UNC DRILL (mm) UNF DRILL (mm) 1.64 1.55 0.80 1.25 2.56 1.8 1.72 1.55 3.48 2.1 2.64 1.85 4.40 2.3 3.56 2.1 5.40 2.6 4.48 2.4 6.32 2.8 5.44 2.7 8.32 3.4 6.40 2.9 10.24 3.9 8.36 3.5 12.24 4.5 10.32 4.1 1/4.20 5.1 12.28 4.6 5/16.18 6.6 1/4.28 5.5 3/8.16 8 5/16.24 6.9 7/16.14 9.4 3/8.24 8.5 1/2.13 10.8 7/16.20 9.9 9/16.12 12.2 1/2.20 11.5 5/8.11 13.6 9/16.18 12.9 3/4.10 16.5 5/8.18 14.5 7/8.9 19.5 3/4.16 17.5 1 8 22.2 7/8.14 20.5 1.1/8.7 25 1 12 23.2 1.1/4.7 28.2 1.1/8.12 26.5 1.3/8.6 30.8 1.1/4.12 29.5 1.1/2.6 34 1.3/8.12 32.8 1.3/4.5 39.5 1.1/2.12 36 2 4.1/2 45.3 BSW & BSF THREADS BSW DRILL(mm) BSF DRILL(mm) 1/8.40 2.54 3/16.32 3.97 3/16.24 3.7 1/4.26 5.37 1/4.20 5.08 5/16.22 6.8 5/16.18 6.5 3/8.20 8.3 3/8.16 7.9 7/16.18 9.7 7/16.14 9.3 1/2.16 11.1 1/2.12 10.6 9/16.16 12.7 9/16.12 12.2 5/8.14 14.1 5/8.11 13.6 11/16.14 15.6 3/4.10 16.5 3/4.12 16.9 13/16.10 18.1 13/16.12 18.5 7/8.9 19.4 7/8.11 19.9 15/16.9 21 1!10 22.9 1 8 22.2 1.1/8.9 25.8 1.1/8.7 24.9 1.1/4.9 28.9 1.1/4.7 28.1 1.3/8.8 31.8 1.3/8.6 30.7 1.1/2.8 34.9 1.1/2.6 33.9 1.5/8.8 38.1 1.5/8.5 36.2 1.3/4.7 40.8 1.3/4.5 39.4 1.7/8.7 44 1.7/8.4.1/2 42 2 7 47.2 2 4.1/2 45.2 PIPE THREADS BSP DRILL (mm) BSPT DRILL (mm) NPT DRILL (mm) NPTF DRILL (mm) PG THREAD DRILL (mm) 1/16.28 6.8 1/16.28 6.2 1/16.27 6.3 1/16.27 6.3 7 11.3 1/8.28 8.8 1/8.28 8.2 1/8.27 8.5 1/8.27 8.4 9 13.9 1/4.19 11.8 1/4.19 10.9 1/4.18 11 1/4.18 10.9 11 17.3 3/8.19 15.3 3/8.19 14.4 3/8.18 14.5 3/8.18 14.25 13.5 19 1/2.14 19.1 1/2.14 18 1/2.14 18 1/2.14 17.75 16 21.2 5/8.14 21.1 3/4.14 23 3/4.14 23 3/4.14 23 21 27 3/4.14 24.6 1 11 29 1 11.5 29 1 11.5 29 29 35.5 7/8.14 28.4 1.1/4 11 38 1.1/4 11.5 38 1.1/4 11.5 37.8

1 11 30.9 1.1/2 11 44 1.1/2 11.5 44 1.1/2 11.5 43.8 1.1/8.11 35.6 2 11 55 2 11.5 56 2 11.5 55.8 1.1/4.11 39.6 2.1/2 11 71 1.3/8.11 42 3 11 83 1.1/2.11 45.5 1.3/4.11 51.4 2 11 57.3 2.1/4 11 63.4 2.1/2 11 72.9 2.3/4 11 79.2 3 11 85.6 TAPPING DRILLS FOR FLUTELESS TAPS METRIC DRILL (mm) UNC DRILL (mm) UNF DRILL (mm) 1.6x0.35 1.45 1.64 1.67 0.80 1.38 2x0.4 1.8 2.56 1.98 1.72 1.69 2.5x0.45 2.3 3.48 2.27 2.64 2 3x0.5 2.8 4.40 2.56 3.56 2.31 3.5x0.6 3.2 5.40 2.89 4.48 2.6 4x0.7 3.7 6.32 3.14 5.44 2.91 4.5x0.75 4.2 8.32 3.8 6.40 3.22 5x0.8 4.6 10.24 4.34 8.36 3.84 6x1 5.6 12.24 5.01 10.32 4.47 8x1.25 7.4 1/4.20 5.77 1/4.28 5.94 10x1.5 9.3 5/16.18 7.3 5/16.24 7.5 12x1.75 11.2 3/8.16 8.8 3/8.24 9 14x2 13.1 7/16.14 10.3 7/16.20 10.5 16x2 15.1 1/2.13 11.8 1/2.20 12.1 BA THREADS THREAD DRILL (mm) 0 5 1 4.4 2 3.9 3 3.4 4 2.95 5 2.6 6 2.25 7 2 8 1.75 9 1.5 10 1.35 Calculating tapping drill sizes. As a rule of thumb, for Metric threads, the tapping drill can be calculated by subtracting the pitch from the diameter of the thread. Eg for an M5x0.75 thread the tapping drill is 5-0.75mm = 4.25mm. For Imperial (inch) threads the tapping drill size is calculated in the same way, diameter minus pitch. Eg for 3/4.10 UNC pitch = 0.1, diameter = 0.75, tapping drill = 0.65 = 16.5mm.

HSS BRITISH ASSOCIATION (BA) TAPS NUMBER STOCK STRAIGHT SET LEFT SPIRAL SPIRAL FLUTE- CODE FLUTE (THREE) HAND POINT FLUTE LESS 12 T3505 15.07 45.20 26.53 10 T3510 7.95 23.86 11.74 14.88 9 T3515 11.64 34.92 11.74 8 T3520 3.69 11.08 5.40 7.28 17.01 7 T3525 5.98 17.95 8.16 6 T3530 2.51 7.52 3.64 4.71 11.40 5 T3535 3.59 10.77 6.85 5.68 7.28 13.14 4 T3540 2.16 6.47 6.07 3.33 4.71 10.66 3 T3545 3.94 11.82 5.68 7.28 2 T3550 2.16 6.47 6.07 3.33 4.36 10.66 1 T3555 3.94 11.82 5.68 7.28 0 T3560 2.51 7.52 6.53 3.64 4.71 HSS BRITISH STANDARD BRASS (BSB) TAPS THREAD STOCK STRAIGHT (BSB) CODE FLUTE 5/16.26 T3400 4.35 3/8.26 T3405 6.59 7/16.26 T3410 9.32 1/2.26 T3415 9.32 9/16.26 T3420 10.93 Sets available on request 5/8.26 T3425 12.23 3/4.26 T3430 15.92 7/8.26 T3435 23.15 1"26 T3440 27.31 HSS BRITISH STANDARD CYCLE (BSCY) TAPS THREAD STOCK STRAIGHT (BSCY) CODE FLUTE 1/4.26 T7005 12.29 5/16.26 T7010 12.29 3/8.26 T7015 12.29 7/16.26 T7020 15.09 1/2.26 T7025 15.09 9/16.26 T7030 19.60 We supply quality tap wrenches 5/8.26 T7035 24.62 3/4.26 T7040 31.68 HSS MODEL ENGINEERS (ME) TAPS THREAD STOCK STRAIGHT (ME) CODE FLUTE 5/32.40 T3600 8.53 3/16.40 T3605 7.06 7/32.40 T3610 7.50 1/4.40 T3615 6.10 5/16.40 T3630 7.94 3/8.40 T3640 8.67 9/32.40 T3620 1.41 5/16.32 T3625 7.94 Dies and dienuts also available 3/8.32 T3635 8.67 7/16.32 T3645 10.55 All prices subject to the addition of carriage and V.A.T.

HSS BSP(F) TAPS Rp THREAD STOCK STRAIGHT SET LEFT SPIRAL SPIRAL STRAIGHT (BSP) CODE FLUTE (THREE) HAND POINT FLUTE FLUTE 1/8.28 T5055 3.26 9.77 9.37 5.49 6.28 13.51 1/4.19 T5060 4.41 13.24 11.58 7.63 8.76 14.81 3/8.19 T5065 6.69 20.07 16.72 11.33 13.37 17.99 1/2.14 T5070 9.01 27.03 22.60 16.32 17.72 20.93 5/8.14 T5075 16.23 48.69 23.87 36.13 3/4.14 T5080 13.56 40.67 34.77 19.45 29.75 28.53 7/8.14 T5095 25.64 76.91 1"11 T5100 23.85 71.56 55.13 34.06 1.1/4.11 T5105 44.95 134.86 1.1/2.11 T5110 55.37 166.11 1.3/4.11 T5115 84.22 252.67 2"11 T5120 91.62 274.86 2.1/4.11 T5125 170.01 510.02 2.1/2.11 T5130 208.18 624.54 2.3/4.11 T5131 250.05 750.14 3"11 T5135 315.32 945.95 HSS BSPT TAPS HSS PG TAPS THREAD STOCK STRAIGHT THREAD STOCK STRAIGHT (BSPT) CODE FLUTE (PG) CODE FLUTE 1/8.28 T5005 7.07 7 T6005 12.43 1/4.19 T5010 7.88 9 T6010 13.66 3/8.19 T5015 13.29 11 T6015 17.45 1/2.14 T5020 15.20 13.5 T6020 20.26 3/4.14 T5030 20.26 16 T6025 31.13 1"11 T5040 30.78 21 T6030 40.08 1.1/4.11 T5045 57.69 29 T6035 62.29 1.1/2.11 T5050 69.07 36 T6040 86.06 2"11 T5053 101.82 42 T6045 126.13 48 T6050 143.33 HSS NPT, NPTF, NPS, NPSF TAPS SIZE/ STOCK NPT NPTF NPTF NPS NPS NPSF NPSF PITCH CODE STRAIGHT STOCK STRAIGHT STOCK STRAIGHT STOCK STRAIGHT FLUTE CODE FLUTE CODE FLUTE CODE FLUTE 1/16.27 T4000 9.52 1/8.27 T4005 7.26 T4105 7.76 T4200 5.68 T4300 6.93 1/4.18 T4010 7.94 T4110 8.60 T4205 7.99 T4305 9.75 3/8.18 T4015 12.59 T4115 16.17 T4210 11.74 T4310 15.73 1/2.14 T4020 13.80 T4120 18.97 T4215 16.07 T4315 19.61 3/4.14 T4025 17.11 T4125 24.72 T4220 23.21 T4320 28.31 1"11.5 T4030 33.62 T4130 43.58 T4225 41.67 T4325 50.84 1.1/4.11.5 T4035 54.46 T4135 68.08 1.1/2.11.5 T4040 62.07 2"11.5 T4045 101.82 All prices subject to the addition of carriage and V.A.T.

HSS BSW TAPS THREAD STOCK STRAIGHT SET LEFT SPIRAL SPIRAL FLUTE- (BSW) CODE FLUTE (THREE) HAND POINT FLUTE LESS 1/16.60 T3000 21.04 63.12 3/32.48 T3005 11.71 35.14 1/8.40 T3010 4.40 13.19 18.38 7.80 9.19 5/32.32 T3015 5.73 17.20 8.96 3/16.24 T3020 2.63 7.88 13.02 3.82 4.85 7/32.24 T3025 3.73 11.18 8.20 1/4.20 T3030 2.45 7.36 7.98 3.47 4.40 11.39 5/16.18 T3040 2.68 8.03 8.70 3.87 4.97 3/8.16 T3045 3.42 10.25 11.20 4.97 6.31 7/16.14 T3050 4.85 14.55 16.85 7.76 8.98 1/2.12 T3055 4.85 14.55 16.85 7.02 8.98 9/16.12 T3060 7.05 21.16 23.87 9.90 13.88 5/8.11 T3065 7.28 21.85 24.84 11.59 11/16.11 T3070 16.00 48.01 19.21 3/4.10 T3075 10.58 31.75 35.89 17.44 13/16.10 T3080 25.03 75.10 7/8.9 T3085 14.55 43.65 46.07 23.22 19.57 15/16.9 T3090 27.35 82.05 1"8 T3095 19.81 59.43 57.91 31.88 26.83 1.1/8.7 T3100 33.43 100.29 1.1/4.7 T3105 42.46 127.39 1.3/8.6 T3110 51.38 154.15 1.1/2.6 T3115 59.55 178.66 1.5/8.5 T3120 71.50 214.49 1.3/4.5 T3125 93.98 281.93 1.7/8.4.5 T3130 106.12 318.37 2"4.5 T3135 115.85 347.54 HSS BSF TAPS THREAD STOCK STRAIGHT SET LEFT SPIRAL SPIRAL FLUTE- (BSW) CODE FLUTE (THREE) HAND POINT FLUTE LESS 3/16.32 T3200 3.03 9.10 5.11 6.29 1/4.26 T3205 2.76 8.27 7.23 4.00 5.07 5/16.22 T3210 3.09 9.26 7.95 4.82 5.73 3/8.20 T3215 3.59 11.82 10.30 6.08 7.98 17.24 7/16.18 T3220 5.94 16.78 14.69 9.15 11.41 1/2.16 T3225 5.59 16.78 15.39 9.15 8.61 9/16.16 T3230 7.33 21.99 5/8.14 T3235 8.40 25.21 23.79 12.83 11/16.14 T3240 18.47 55.40 3/4.12 T3245 12.92 36.66 13/16.12 T3250 28.89 86.66 7/8.11 T3255 18.26 54.78 27.87 1"10 T3260 22.24 66.72 49.02 1.1/8.9 T3265 38.03 114.10 1.1/4.9 T3270 51.95 155.86 1.3/8.8 T3275 54.71 170.44 1.1/2.8 T3280 67.72 203.16 1.5/8.8 T3285 81.42 244.26 1.3/4.7 T3290 106.06 318.18 2"7 T3295 122.90 368.70 2.1/4.6 T3300 210.29 630.88 2.1/2.6 T3305 264.65 793.94 All prices subject to the addition of carriage and V.A.T.

Listed below is our stocked range of Metric HSS taps. This includes many sizes that are often considered 'special'. We can also supply virtually any other tap, please enquire. We also stock SCREW GAUGES, DIES, DIENUTS, TAP WRENCHES & DIE STOCKS.

HSS METRIC TAPS ISO 529 STANDARD COARSE*, FINE**, & SPECIAL SIZE/ STOCK STRAIGHT SET LEFT SPIRAL SPIRAL FLUTE- PITCH CODE FLUTE (THREE) HAND POINT FLUTE LESS 1.4x0.3 T1003 6.90 20.69 1.6x0.35* T1005 6.90 20.69 7.35 10.29 18.52 1.7x0.35 T1010 6.90 20.69 2x0.4* T1015 3.35 10.05 8.89 4.85 7.24 14.23 2.2x0.45 T1025 3.38 10.14 2.5x0.45 T1040 2.72 8.16 8.81 3.90 5.00 13.53 3x0.35** T1050 3.45 10.36 3x0.5* T1055 1.84 5.51 5.61 2.72 3.38 7.59 3x0.6 T1060 3.64 10.92 3.5x0.6 T1075 1.98 5.95 6.21 2.94 4.38 8.11 4x0.5** T1080 3.80 11.41 6.52 7.83 4x0.7* T1085 1.69 5.07 4.74 2.50 3.16 6.81 4x0.75** T1090 2.98 8.93 4.5x0.5** T1095 4.50 10.36 7.23 4.5x0.75* T1100 2.98 8.93 9.67 3.64 3.82 5x0.5** T1105 3.80 11.41 6.81 10.28 5x0.75 T1110 3.92 11.75 5x0.8* T1115 1.79 5.38 4.76 2.60 3.38 7.29 6x0.5 T1130 10.17 30.51 6x0.75** T1135 3.10 9.31 5.61 6.69 6x1* T1140 1.76 5.29 4.76 2.65 3.38 7.40 6x1.25 T1145 8.06 24.17 7x0.5 T1150 10.69 32.06 7x0.75** T1155 3.80 11.41 7x1* T1160 3.62 10.87 8.45 5.06 5.79 7x1.25 T1165 10.83 32.48 7x1.5 T1170 12.22 36.67 8x0.5 T1175 12.93 38.80 36.71 8x0.75** T1180 4.50 13.51 13.56 5.92 8.55 8x1** T1185 3.80 11.41 10.77 6.01 7.94 8x1.25* T1190 2.03 6.09 5.62 2.94 3.75 9.34 8x1.5 T1195 10.57 31.72 9x0.5 T1200 14.33 43.00 9x0.75 T1205 12.79 38.37 9x1** T1210 8.49 25.48 32.94 9x1.25* T1215 3.53 10.58 10.71 6.84 8.23 9x1.5 T1220 10.84 32.53 10x0.5 T1225 12.93 38.80 10x0.75 T1230 7.79 23.38 32.94 10x1** T1240 4.17 12.51 15.18 9.26 10.26 10x1.25** T1245 4.17 12.51 15.18 9.26 10.25 10x1.5* T1250 2.65 7.94 6.87 3.82 4.78 10.56 11x0.5 T1255 16.66 45.77 11x0.75 T1260 15.26 45.77 11x1** T1265 15.26 45.77 11x1.25* T1270 15.26 45.77

All prices subject to the addition of carriage and V.A.T. HSS METRIC TAPS ISO 529 STANDARD COARSE*, FINE**, & SPECIAL SIZE/ STOCK STRAIGHT SET LEFT SPIRAL SPIRAL FLUTE- PITCH CODE FLUTE (THREE) HAND POINT FLUTE LESS 11x1.5 T1275 6.41 19.22 19.47 11x1.75 T1280 16.66 49.96 12x0.5 T1285 14.15 42.46 12x0.75 T1290 14.15 42.46 12x1** T1295 9.11 27.34 22.60 17.92 21.57 12x1.25** T1300 6.17 18.52 20.70 12.04 12.66 12x1.5** T1305 6.17 18.52 17.62 12.04 12.66 12x1.75* T1310 3.68 11.03 10.16 5.29 6.62 20.53 13x0.75 T1316 20.51 61.52 13x1 T1320 20.51 61.52 33.04 23.37 35.89 13x1.25 T1325 20.51 61.52 13x1.5 T1330 20.51 61.52 13x1.75 T1335 20.51 61.52 14x0.5 T1340 27.86 83.57 14x0.75 T1345 27.86 83.57 14x1** T1350 13.51 40.52 35.51 23.01 14x1.25** T1355 7.61 22.83 14.30 14.32 17.90 14x1.5** T1360 6.91 20.73 19.26 13.32 17.90 14x2* T1365 4.43 13.28 12.08 7.09 8.79 15x1 T1370 12.10 36.31 29.22 15x1.5 T1375 12.10 36.31 15x1.75 T1380 20.51 61.52 15x2 T1385 20.51 61.52 16x0.5 T1386 33.04 99.11 16x1** T1390 13.13 39.38 28.96 18.89 25.58 16x1.25 T1395 14.32 42.95 16x1.5** T1400 7.09 21.27 26.61 15.90 18.56 16x1.75 T1405 14.32 42.95 16x2* T1410 5.56 16.67 15.00 7.94 10.14 21.35 17x1 T1415 22.17 66.50 30.67 33.25 17x1.5 T1420 20.44 61.32 17x2 T1425 29.11 87.34 18x0.5 T1429 34.36 103.08 18x1** T1430 16.51 49.53 31.38 22.01 30.58 18x1.25 T1435 18.62 55.85 18x1.5** T1440 10.80 32.41 29.99 20.93 24.11 18x2** T1445 19.73 59.20 18x2.5* T1450 8.09 24.26 24.05 13.71 16.80 19x1 T1455 26.57 79.71 19x1.5 T1460 26.57 79.71 20x0.5 T1464 36.27 108.82 20x1** T1465 16.97 50.90 34.56 20.74 27.65 20x1.25 T1470 23.51 70.54 All prices subject to the addition of carriage and V.A.T.

HSS METRIC TAPS ISO 529 STANDARD COARSE*, FINE**, & SPECIAL SIZE/ STOCK STRAIGHT SET LEFT SPIRAL SPIRAL PITCH CODE FLUTE (THREE) HAND POINT FLUTE 20x1.5** T1475 13.23 39.69 30.32 22.37 29.93 20x2** T1480 19.82 59.45 36.35 20x2.5* T1485 9.19 27.56 25.55 13.23 16.91 21x1 T1490 37.39 112.16 21x1.25 T1495 37.39 112.16 21x1.5 T1500 37.39 112.16 22x0.75 T1504 30.61 91.84 22x1 T1505 29.30 87.90 40.61 33.96 39.29 22x1.25 T1510 29.30 87.90 22x1.5** T1515 16.25 48.74 35.65 29.56 34.60 22x1.75 T1520 28.25 84.75 22x2** T1525 16.97 50.90 40.61 22x2.5* T1530 11.03 33.08 27.20 16.93 23.93 23x1 T1535 43.74 131.22 23x1.5 T1540 43.74 131.22 24x1 T1545 26.56 79.69 42.41 36.11 41.20 24x1.25 T1550 26.56 79.69 24x1.5** T1555 24.82 74.45 41.86 26.64 31.44 24x2** T1560 21.14 63.42 33.59 23.70 29.36 24x2.5 T1561 26.56 79.69 24x3* T1565 13.60 40.79 34.77 19.85 25.43 25x1 T1570 32.99 98.98 25x1.25 T1571 32.99 98.98 25x1.5** T1575 20.38 60.97 44.08 24.84 30.26 25x2 T1580 32.99 98.98 25x3 T1581 32.99 98.98 26x1 T1585 24.44 73.32 43.62 31.38 44.69 26x1.5 T1590 24.44 73.32 43.62 30.12 42.77 26x2 T1595 32.99 98.98 27x1 T1600 41.50 124.49 27x1.25 T1601 41.52 124.56 27x1.5** T1605 36.40 109.20 44.43 36.10 43.81 27x2** T1610 30.70 92.09 43.81 27x3 T1615 22.21 66.63 34.10 34.56 40.91 28x1 T1620 42.84 128.51 28x1.5 T1625 35.21 105.64 28x2 T1630 35.21 105.64 29x1 T1635 44.54 133.62 29x1.5 T1640 44.54 133.62 29x2 T1641 44.54 133.62 30x1 T1645 48.25 144.76 68.80 52.22 65.86 30x1.5** T1650 38.68 116.03 61.87 40.46 49.69 30x2** T1655 34.37 103.11 44.98 53.17 30x3** T1660 42.34 127.01 54.60

All prices subject to the addition of carriage and V.A.T. HSS METRIC TAPS ISO 529 STANDARD COARSE*, FINE**, & SPECIAL SIZE/ STOCK STRAIGHT SET LEFT SPIRAL SPIRAL PITCH CODE FLUTE (THREE) HAND POINT FLUTE 30x3.5* T1665 22.64 67.91 55.72 38.34 43.75 31x1 T1670 61.45 184.34 31x1.5 T1675 61.45 184.34 32x1 T1680 50.27 150.82 32x1.5** T1685 38.50 115.50 71.86 52.38 32x2 T1690 38.50 115.50 33x1 T1695 50.27 150.82 33x1.5 T1700 38.50 115.50 33x2** T1705 45.73 137.20 33x3** T1710 45.73 137.20 70.82 33x3.5* T1715 33.19 99.57 73.33 34x1 T1720 53.51 160.52 34x1.5 T1725 53.51 160.52 34x2 T1730 53.51 160.52 35x1 T1735 53.51 160.52 35x1.5 T1740 40.25 120.75 77.47 35x2 T1745 53.51 160.52 36x1 T1750 53.51 160.52 36x1.5 T1755 53.51 160.52 77.47 36x2 T1760 53.51 160.52 36x2.5 T1761 53.51 160.52 36x3 T1765 53.51 160.52 36x4* T1770 34.51 103.53 37x1 T1775 67.77 203.30 37x1.5 T1780 67.77 203.30 37x2 T1785 67.77 203.30 37x3 T1790 67.77 203.30 38x1 T1795 59.45 178.31 38x1.5 T1800 59.45 178.31 38x2 T1805 59.45 178.31 39x1 T1810 67.77 203.30 39x1.5 T1815 63.04 189.13 39x2 T1820 63.04 189.13 39x3 T1825 63.04 189.13 39x4 T1830 43.93 131.78 40x1 T1835 67.77 203.30 40x1.5 T1840 69.29 207.88 40x2 T1845 69.29 207.88 40x3 T1850 69.29 207.88 41x1 T1855 69.29 207.88 41x1.5 T1860 69.29 207.88 42x1 T1865 78.79 236.38 42x1.5 T1870 78.79 236.38 137.64 42x2 T1875 78.79 236.38

All prices subject to the addition of carriage and V.A.T. HSS METRIC TAPS ISO 529 STANDARD COARSE*, FINE**, & SPECIAL SIZE/ STOCK STRAIGHT SET LEFT SPIRAL SPIRAL PITCH CODE FLUTE (THREE) HAND POINT FLUTE 42x2.5 T1877 78.79 236.38 42x3 T1880 78.79 236.38 42x4.5* T1885 52.33 156.98 60.20 64.82 43x1 T1890 78.79 236.38 43x1.5 T1895 78.79 236.38 44x1 T1900 78.79 236.38 44x1.5 T1905 78.79 236.38 44x2 T1910 78.79 236.38 44x2.5 T1911 78.79 236.38 44x3 T1915 78.79 236.38 45x1 T1920 78.79 236.38 45x1.5 T1925 78.79 236.38 45x2 T1930 78.79 236.38 45x3 T1935 78.79 236.38 45x4.5 T1940 68.16 204.49 67.52 81.01 46x1 T1945 81.88 245.64 48x1 T1950 81.88 245.64 48x1.5 T1955 81.88 245.64 48x2 T1960 81.88 245.64 48x3 T1965 81.88 245.64 48x4 T1966 81.88 245.64 48x5* T1968 74.31 222.92 50x1 T1970 88.46 265.37 50x1.5 T1973 88.46 265.37 50x2 T1974 88.46 265.37 52x2 T1978 96.03 288.08 52x3 T1979 96.03 288.08 52x5* T1980 100.51 301.52 56x4 T1981 109.07 327.22 56x5.5 T1982 133.42 400.26 60x2 T1983 139.65 418.95 60x3 T1984 139.65 418.95 60x5.5* T1985 158.34 475.02 64x1.5 T1987 227.85 683.55 64x3 T1988 227.85 683.55 64x4 T1989 227.85 683.55 64x6 T1990 227.85 683.55 72x2 T1994 249.90 749.70 72x3 T1995 249.90 749.70 80x2 T1998 275.63 826.88 All prices subject to the addition of carriage and V.A.T.

DIN 376 (REDUCED SHANK) SIZE/ STOCK STRAIGHT SPIRAL SPIRAL PITCH CODE FLUTE POINT FLUTE 3x0.5 T1055 5.69 6.64 7.07 4x0.7 T1085 6.45 6.90 7.07 5x0.8 T1115 6.45 6.90 7.60 6x1 T1140 6.45 6.90 7.60 8x1.25 T1190 6.90 7.28 7.92 10x1.5 T1250 7.85 8.72 9.12 12x1.75 T1310 8.62 9.41 9.87 16x2 T1410 12.22 13.16 14.65 DIN 371 (REINFORCED SHANK) SIZE STOCK STRAIGHT SPIRAL SPIRAL PITCH CODE FLUTE POINT FLUTE 3x0.5 T1055 4.95 6.29 7.09 4x0.7 T1085 5.02 5.82 6.60 5x0.8 T1115 5.52 6.03 6.60 6x1 T1140 5.64 6.10 6.60 8x1.25 T1190 6.03 6.77 7.70 10x1.5 T1250 7.69 8.62 10.48 MACHINE NUT TAPS Available in bottom, second and taper leads SIZE/ STOCK STRAIGHT PITCH CODE FLUTE 3x0.5 T10559M 11.62 4x0.7 T10859M 11.34 5x0.8 T11159M 11.34 6x1 T11409M 11.34 8x1.25 T11909M 12.78 10x1.5 T12509M 16.00 12x1.75 T13109M 21.50 14x2 T13659M 27.41 16x2 T14109M 34.13 18x2.5 T14509M 46.38 20x2.5 T14859M 55.62 All prices subject to the addition of carriage & V.A.T.

HSS METRIC OVERSIZE TAPS SIZE/ PLUS STOCK STRAIGHT SPIRAL SPIRAL PITCH (INCHES) CODE FLUTE POINT FLUTE 3x0.5 0.001 T1055 7.35 3x0.5 0.002 T1055 7.35 7.88 9.19 3x0.5 0.005 T1055 7.35 7.88 9.19 4x0.7 0.001 T1085 7.35 9.19 4x0.7 0.002 T1085 7.35 7.88 9.19 4x0.7 0.005 T1085 7.35 7.88 9.19 5x0.8 0.001 T1115 7.35 7.88 9.19 5x0.8 0.002 T1115 7.35 7.88 9.19 5x0.8 0.005 T1115 7.35 7.88 9.19 6x1 0.001 T1140 7.35 7.88 9.19 6x1 0.002 T1140 7.35 7.88 9.19 6x1 0.005 T1140 7.35 7.88 9.19 8x1.25 0.002 T1190 8.40 9.19 10.24 8x1.25 0.010 T1190 8.40 9.19 10.24 8x1.25 0.015 T1190 8.40 9.19 10.24 10x1.5 0.002 T1250 9.45 10.37 10x1.5 0.010 T1250 9.45 12x1.75 0.015 T1310 10.24 12.34 14x1.5 0.004 T1360 14.96 16x2 0.015 T1410 13.91 20x2.5 0.015 T1485 25.20 14.96 24x3 0.015 T1565 33.86 27x3 0.015 T1615 46.99 30x3.5 0.015 T1665 67.20 This list is of our stocked oversize metric taps for producing threads prior to plating. We can supply any other oversized or undersized tap in any thread form. Please call for a quotation. We can also supply gauging to suit. All prices subject to the addition of carriage and V.A.T.

HSS UNC TAPS THREAD STOCK STRAIGHT SET LEFT SPIRAL SPIRAL FLUTE- (UNC) CODE FLUTE (THREE) HAND POINT FLUTE LESS 1.64 T2005 9.28 27.85 14.61 15.44 22.49 2.56 T2010 6.58 19.74 10.74 16.32 22.49 3.48 T2015 6.58 19.74 10.74 16.32 22.49 4.40 T2020 3.68 11.03 7.44 7.64 15.47 5.40 T2025 4.38 13.13 7.09 9.74 15.47 6.32 T2030 2.21 6.62 3.81 4.87 9.66 8.32 T2035 2.21 6.62 3.81 4.87 9.66 10.24 T2040 2.21 6.62 3.81 4.87 9.66 12.24 T2045 3.07 9.21 4.22 6.43 1/4.20 T2050 2.03 6.09 6.34 2.94 3.70 7.73 5/16.18 T2055 2.28 6.84 6.76 3.66 4.15 10.27 3/8.16 T2060 2.90 8.61 8.54 4.19 5.29 13.16 7/16.14 T2065 4.12 12.35 11.27 6.43 8.53 1/2.13 T2070 4.12 12.35 11.27 6.43 7.48 9/16.12 T2075 6.57 19.72 11.07 10.42 5/8.11 T2080 6.03 18.08 16.51 10.50 10.86 3/4.10 T2085 8.89 26.68 22.86 13.77 17.24 7/8.9 T2090 13.45 40.36 29.20 19.67 24.36 1"8 T2095 14.99 44.98 34.09 24.10 31.36 1.1/8"7 T2100 28.49 85.47 1.1/4"7 T2105 34.66 103.98 1.3/8"6 T2110 40.91 122.73 1.1/2"6 T2115 47.45 142.36 76.92 1.3/4"5 T2120 69.94 209.83 2"4.5 T2125 87.23 261.70 HSS UNF TAPS THREAD STOCK STRAIGHT SET LEFT SPIRAL SPIRAL FLUTE- (UNF) CODE FLUTE (THREE) HAND POINT FLUTE LESS 0.80 T2200 19.08 57.25 17.11 1.72 T2205 9.16 27.47 2.64 T2210 6.93 20.80 9.32 22.05 3.56 T2215 6.93 20.80 4.48 T2220 4.29 12.87 7.43 9.32 21.35 5.44 T2225 4.29 12.87 7.43 9.32 6.40 T2230 2.82 8.46 4.42 5.93 8.36 T2235 2.82 8.46 4.42 5.73 11.34 10.32 T2240 2.47 7.41 4.42 5.73 11.34 12.28 T2245 3.22 9.65 5.05 7.07 1/4.28 T2250 2.13 6.39 6.59 3.22 3.97 10.41 5/16.24 T2255 2.47 7.41 6.89 3.80 4.42 10.73 3/8.24 T2260 3.09 9.26 9.34 4.83 5.67 13.06 7/16.20 T2265 4.26 12.79 13.95 6.87 9.12 22.30 1/2.20 T2270 4.26 12.79 13.95 6.87 9.12 9/16.18 T2275 5.66 16.98 22.54 13.12 13.45 5/8.18 T2280 6.85 20.54 20.35 11.31 15.73 3/4.16 T2285 9.91 29.72 27.99 15.84 21.43 7/8.14 T2290 13.99 41.96 32.59 22.54 31.22 1"12 T2295 17.79 53.37 46.57 30.23 34.93 1.1/8"12 T2300 26.58 79.74 1.1/4"12 T2305 39.15 117.44 1.3/8"12 T2310 47.76 143.27 1.1/2"12 T2315 58.25 174.74 All prices subject to the addition of carriage and V.A.T.

HSS UNEF* & UNIFIED SPECIAL TAPS Prices are for straight flute. Spiral point and Spiral flute quoted on request DIAMETER STOCK PRICE DIAMETER STOCK PRICE TPI CODE EACH TPI CODE EACH 1/4.40 T2400 7.88 1"16 T2595 25.73 5/16.40 T2401 11.58 1.3/8.16 T2598 37.67 1/4.36 T2405 7.35 1.7/16.16 T2599 40.43 VG5 0.210.36 T2410 7.35 1.1/2.16 T2600 44.10 1/4.32* T2420 5.25 1.5/8.16 T2605 53.29 5/16.32* T2425 5.78 1.3/4.16 T2610 72.03 3/8.32* T2430 5.95 2"16 T2615 88.20 1/2.32 T2431 9.19 1"14 T2620 21.51 1"32 T2434 27.01 1.1/16.12 T2625 31.24 7/16.28* T2435 6.65 1.3/16.12 T2630 41.64 1/2.28* T2440 6.65 1.5/16.12 T2635 47.10 7/16.27 T2445 14.70 1.7/16.12 T2636 49.61 1/2.27 T2446 14.70 1.5/8.12 T2640 65.80 1/4.24 T2450 11.03 1.11/16.12 T2639 77.36 7/16.24 T2455 9.10 1.3/4.12 T2645 81.13 1/2.24 T2460 9.19 1.7/8.12 T2648 87.06 9/16.24* T2465 9.74 2"12 T2650 89.40 5/8.24* T2470 9.74 11/16.11 T2655 13.41 11/16.24* T2475 14.55 1.5/16.10 T2658 44.10 3/8.20 T2480 11.03 1.1/8.8 T2660 30.06 9/16.20 T2485 12.86 1.1/4.8 T2665 40.43 5/8.20 T2490 13.78 1.3/8.8 T2670 45.94 11.16.20 T2495 13.78 1.1/2.8 T2675 49.61 3/4.20* T2500 14.82 1.5/8.8 T2680 66.38 13/16.20* T2505 13.23 1.3/4.8 T2685 82.69 7/8.20* T2510 15.99 1.7/8.8 T2690 90.87 15/16.20* T2515 17.09 2"8 T2693 91.98 1"20* T2520 20.40 2.1/4.8 T2700 156.19 1.3/16.20 T2522 34.73 2.3/8.8 T2702 165.38 1.1/8.18* T2530 33.04 2.1/2.8 T2705 178.24 1.3/16.18* T2535 34.73 2.5/8.8 T2707 189.63 9/16.16 T2580 12.86 2.3/4.8 T2710 254.31 11/16.16 T2585 13.41 3"8 T2715 301.35 13/16.16 T2590 17.46 3.1/4.8 T2717 349.13 7/8.16 T2591 17.82 3.1/2.8 T2719 523.69 HSS TRAPEZOIDAL TAPS THREAD STOCK RH RH LH LH (TR) CODE SHORT LONG SHORT LONG 8x1.5 T8005 64.68 91.14 10x2 T8010 67.62 95.55 80.85 113.93 12x3 T8015 72.03 101.43 86.36 121.28 14x3 T8020 80.85 113.19 16x4 T8025 83.79 117.60 101.06 141.49 18x4 T8030 105.84 148.47 20x4 T8035 127.89 180.81 154.35 213.15 22X4 T8040 136.71 191.10 24x5 T8045 144.06 202.86 242.55 All prices subject to the addition of carriage and V.A.T.