Specifications for Lathe L- 45/5000(for items from Sr. 01 to Sr. 22 in Indent) Annexure-1 Sr. Specification of Parameter Parameter Value 1.0 Capacity 1.1 Height of centers (nominal) (mm) 450 1.2 Type of bed Induction Hardened, Straight Gap bed 1.3 Swing over bed (mm) 900 1.4 Swing over carriage wings (mm) 900 1.5 Swing over cross slide (mm) 570 1.6 Width of bed (mm) 710 1.7 Distance between centers (mm) 5000 1.8 Swing in gap (mm) 1300 1.9 Carriage travel (mm) 4850 2.0 Head-Stock: a) The Head stock shall be made from High quality cast iron of IS: 210-1993 FG 260 of box type construction with heavy front wall to ensure stability and precision and to resist heavy cutting forces. b) All main drive gears of the head stock shall be of alloy steel hardened and profile ground. The surface hardness of these gears shall not be less than 58-62 HRC. c) Material Specification : 15 Ni 7 Cr 4 M02 as per IS: 4432-1998. d) Method of grinding : Reishauver Gear Grinding Surface finish Max. : 0.8micronsurfaceroughnessRa value e) Lubrication system shall be provided by a separate pump in headstock. The main spindle shall be free from vibration at all speeds and loads. f) The feed box shall be totally enclosed and provided with universal gear box. g) The Main spindle shall be of good quality Alloy Steel and hardened / ground to a surface hardness value of not less than 58-62 HRC. h) Spindle and other parts rotating with peripheral speed of more than 3 m/sec. shall be dynamically balanced. i) Suitable breaking system for quick stoppage of spindle shall be provided. j) Electromagnetic brake clutch used shall be of reputed make and capable of transmitting at least 1.5 times the maximum rated torque. 2.1 Spindle nose type / bore (mm) A2-11/ 110 2.2 Taper in nose Metric 120 short 2.3 Speed Range (rpm) 21 from 4.5 to 450 forward. 6 from 9 to 450 reverse. 3.0 Feeds and Threads 3.1 Feed range longitudinal(mm/rev) 77 from 0.1 to 6.4 3.2 Feed range transverse (mm/rev) 71 from 0.05 to 3.2 3.3 Lead screw pitch(mm) 6 3.4 Metric threads(mm) 51 from 1 to 112 3.5 Inch threads (tpi) 56 from ¼ to 28 3.6 Module threads(mm) 39 from 0.5 to 36 3.7 Diametrical pitch (DP) 51 from ¾ to 56 4.0 Carriage: a) Carriage guide ways shall be precision machined and hand scrapped to suit the hardened bed guide ways. b) Lead screw shall be of suitable material, thread milled and finish cut. Pitch accuracy shall be 0.03 mm or better over a length of 300 mm.
c) Automatic feeds for sliding motion shall be provided. Automatic stop for longitudinal feed shall be provided. Suitable interlocking arrangement against simultaneous engagement of feed shaft and lead screw shall be provided. d) Cross slide guide ways shall be precision machined and hand scrapped to suit the saddle guide ways. e) Cross feed screw shall be provided with backlash eliminator system for accurate machining. The cross feed screw nut is of two pieces construction with a wedge in between, to eliminate the backlash between screw and nut. f) Automatic feeds for surfacing motion shall be provided. 4.1 Cross slide travel(mm) 500 4.2 Top slide travel(mm) 225 4.3 Tool shank size (mm X mm) 40 X 40 4.4 Rapid traverse (m/min) 3 5.0 Tail-Stock: a) Tailstock casting shall be of high quality cast iron conforming to IS: 1993 FG-260. Hardness 180-230 BHN. b) Tailstock bore shall be honed to ensure easy and accurate sliding of the sleeve. c) Tailstock sleeve shall be of case hardening steel conforming to 15Ni7Cr4M02 as per IS: 4432-1988. It shall be hardened and ground to a hardness of not less than 58-62 HRC. d) Tailstock shall be movable easily on the bed in de-clamped condition, using a crank handle provided as standard accessory. 5.1 Sleeve diameter /taper(mm) MT6 5.2 Sleeve stroke (mm) 325 5.3 Cross traverse from center (mm) 10 6.0 General 6.1 Power of main motor (kw) 18.5 6.2 Power of coolant pump motor (kw) 0.18 6.3 Rapid traverse motor (kw) 0.75 6.4 Floor space (mm X mm) 8100 X 3000 6.5 Colour Standard Apple Green 6.6 The Machine bed shall be a casting of robust construction heavily ribbed for stability, rigidity and vibration free operation. 6.7 Casting shall be made of high quality cast iron equivalent to Mechanite Grade GD-250. The saddle slide waysshall be provided with suitable wipers to avoid entry of chips and swarf. 6.8 Guide ways shall be hardened and ground to a hardness of not less than Rockwell C-45. The maximum variation in hardness on the guide ways shall not exceed 5 RC. The design shall provide for stick slip free operation and saddle shall be provided with turcite lining. 6.9 The machine shall be provided with 4 way manually index able heavy duty square tool post for mounting of tool shank size 40 x 40 mm. The tool post shall be made of Case hardened steel 15Ni7Cr4M02 as per IS:4432-1988. The Guide ways of the tool post shall be hardened and ground to surface hardness of 58-62 HRC. 6.10 Suitable chip collecting tray for swarf disposal shall be provided. 6.11 Short spindle and shafts for maximum drive rigidity. 6.12 Straight bed and gap version with removable bridge piece. 6.13 All drive gears in headstock shall be case hardened and ground. 6.14 Dry sump lubrication for minimum thermal deformation. 6.15 Induction hardened integral guide ways on bed.
6.16 Test and Fitment certificate shall be supplied along with delivery of the material. 6.17 Material covered under thisindent/po shall be guaranteed for quality of material and workmanship for the period of 12 months from the date of receipt/inspection or 18 months from the date of dispatch whichever is earlier. List of Special Accessories for L- 45/5000: Sr. Item Description Unit Qty. 1) 3 Jaw manual chuck diameter 500 mm with chuck back plate/set of 01 hard-soft jaws. 2) 3 Jaw manual chuck diameter 800 mm with chuck back plate/set of 01 hard-soft jaws. 3) 4 jaw chuck diameter900 mm. 01 4) Rotating Centre with MT6 shank. 01 5) Cast Iron face plate diameter 900 mm. 01 6) Splash guard 01 7) Machine lamp for 24 volts 01 8) Taper turning attachment 01 9) Steady rest diameter-70-400 mm(plain) 01 10) Roller Steady rest diameter-70-400 mm 01 11) Follow rest diameter 80-300 mm 01 12) Driving Plate 01 13) Coolant equipment 01 14) Set of Normal running Spares Set 01 15) Operation, Maintenance and Spares Parts Manual Set 01 16) Foundation bolts and leveling plates with adjusting bolts Set 01 17) First Fill of Oil, Lubricant and Coolant 01 18) Commissioning Services 01
Annexure-2 SPECIFICATION FOR LATHE NH- 22/2000(for items from Sr. 23 to Sr. 66 in Indent) Sr. Specification of Parameter Parameter Value 1.0 Capacity 1.1 Height of centers (Nominal) (mm) 220 1.2 Type of bed Induction Hardened, Straight Gap bed 1.3 Swing over bed (mm) 500 1.4 Swing over carriage wings (mm) 480 1.5 Swing over cross slide (mm) 270 1.6 Distance between centers (mm) 2000 1.7 Swing in gap (mm) 720 1.8 Width of bed (mm) 415 1.9 Carriage travel (mm) 1700 2.0 Head-Stock: The Head stock is made from High quality cast iron Grade-4.The box type construction with heavy front wall to ensure stability and precision and to resist heavy cutting forces. a) All main drive gears of the head stock shall be of alloy steel hardened and profile ground. The gears shall not be less than Class-5 quality. b) Lubrication system shall be provided by a separate pump in headstock. The main spindle shall be free from vibration at all speeds and loads. c) The feed box shall be totally enclosed and provided with universal gear box. d) The Main spindle shall be of good quality C2R grade forged Steel and hardened / ground with surface finish 0.8 micron. e) Spindle and other parts rotating with peripheral speed of more than 3 m/sec. shall be dynamically balanced. f) Hydraulic operated breaking system for quick stoppage of spindle shall be provided. g) Main Spindle must be supported on pre-loaded high precision taper roller bearings of reputed make GAMET/TIMKEN and must be are of precision class not less than P6. 2.1 Spindle nose/bore (mm) A2-6/53 2.2 Spindle socket taper (mm) Metric 60/53 bore 2.3 Speed Range Standard -16 from 40-2040 forward - 7 from 60-1430 reverse 3.0 Feeds and Threads 3.1 Feed range longitudinal (mm/rev) 60 from 0.04-2.24 (Indicated feeds 27 Nos.) 3.2 Feed range cross(mm/rev) 60 from 0.02-1.12 (Indicated feeds 27 Nos.) 3.3 Lead screw pitch (mm) 6 3.4 Metric threads(mm) 48 from 0.5-28 mm 3.5 Inch threads(tpi) 60 from 56-1 3.6 Module threads(mm) 40 from 0.25-14 4.0 Carriage: a) Carriage guide ways shall be precision machined and hand scrapped to suit the hardened bed guide ways. b) Lead screw shall be of suitable material, thread milled and finish cut. Pitch
accuracy shall be 0.03 mm or better over a length of 300 mm. c) Automatic feeds for sliding motion shall be provided. Automatic stop for longitudinal feed shall be provided. Suitable interlocking arrangement against simultaneous engagement of feed shaft and lead screw shall be provided. d) Cross slide guide ways shall be precision machined and hand scrapped to suit the saddle guide ways. e) Cross feed screw shall be provided with backlash eliminator system for accurate machining. The cross feed screw nut is of two pieces construction with a wedge in between, to eliminate the backlash between screw and nut. f) Automatic feeds for surfacing motion shall be provided. 4.1 Cross slide travel(mm) 300 4.2 Top slide travel(mm) 150 4.3 Tool shank size (mm X mm) 25 X 25 5.0 Tail-Stock: a) Tailstock casting is of high quality cast iron of Grade-4. b) Tailstock bore shall be honed to ensure easy and accurate sliding of the sleeve. c) Tailstock sleeve bore shall be of case hardening steel with MT5 taper. d) Tailstock shall be movable easily on the bed in de-clamped condition by manually. 5.1 Sleeve diameter/taper(mm) 90/ MT5 5.2 Sleeve Travel(mm) 200 6.0 General 6.1 Power of main motor(kw) 11 6.2 Power of coolant pump motor(kw) 0.1 6.3 Floor space (mm X mm) 1176 X 3465 6.4 Colour Standard Apple Green 6.5 The Machine bed shall be a casting of robust construction heavily ribbed for stability, rigidity and vibration free operation. 6.6 Casting shall be made of high quality cast iron equivalent to Mechanite Grade G-4. The saddle slide ways shall be provided with suitable wipers to avoid entry of chips and swarf. 6.7 Guide ways shall be hardened and ground to a hardness of minimum 48 HRC. 6.8 The machine is provided with quick change tool post with size 25 X 25 mm. 6.9 Suitable chip collecting tray for swarf disposal shall be provided. 6.10 Short spindle and shafts for maximum drive rigidity. 6.11 All drive gears in headstock shall be case hardened and ground. 6.12 Recirculating pressure lubrication for minimum thermal deformation. 6.13 Test and Fitment certificate shall be supplied along with delivery of the material. 6.14 Material covered under thisindent/po shall be guaranteed for quality of material and workmanship for the period of 12 months from the date of receipt/inspection or 18 months from the date of dispatch whichever is earlier. List of special accessories for NH- 22/2000: Sr. Item Description Unit Qty. 1) 3 Jaw Self centering chuck diameter 250 mm with one set of hardened 01 jaws reversible for external and internal chucking. 2) Universal face plate diameter 480 mm 01 3) 4 Jaw Independent Chuck diameter 400 mm 01 4) Swarf tray and coolant assembly 01 5) Splash Guard 01 6) Machine lamp 24 volt without bulb. 01
Sr. Item Description Unit Qty. 7) Steady rest 8-145 mm 01 8) Follow rest 8-80 mm 01 9) Rotating centre with MT5 shank 01 10) Longitudinal stop 01 11) Stop roll 01 12) Taper turning attachment 01 13) Star Delta Starter 01 14) Set of Spares 01 15) Special tool kit consisting of turning tools, parting tools, external 01 threading tools with a set of corresponding inserts. 16) Change gear for DP threads Set 01 17) Normal Running Spares for 5 years. Set 01 18) Operation, Maintenance and Spares Parts Manual Set 01 19) Foundation bolts and leveling plates with adjusting bolts Set 01 20) First Fill of Oil, Lubricant and Coolant 01 21) Commissioning Services 01 Set of normal running spares for 5 years for NH- 22 / 2000 Sr. Description Unit Qty. 1) V Belt - B72" for NH 22(for 50 cycles supply). One set consists of four Set 01 belts. 2) Oil Seal 16 / 28 X 7 01 3) Oil Seal 55 / 80 X 10 01 4) Oil Seal 45 / 60 X 7 01 5) Oil Seal 30 / 42 X 7 01 6) Oil Seal 35 / 62 X 10 01 7) Packing HO 75 02 8) Felt 5 X 4 X 1000 01 9) Stop 01 10) Compression Spring 0.8 X 6 X 25 01 11) Pin B3 01 12) Special Spring 01 13) Pinion Shaft 01 14) V Seal Ring V85A 01 15) U Packing NA 150 (50 X 40 X 7) 01 16) O Ring R159 02 17) O Ring diameter 12 X 2 01 18) O Ring diameter 65 X 3 01 19) A.B.Contactor 9A 01 20) A.B. Contactor 2NO+2NC 01 21) A.B.Contactor 12A 01 22) Limit Switch LTPR 01 23) Aux. Contactor Block 2NO 01 24) Aux. Contactor Block 2NC 01 25) Bulb PE 28W 02 26) Bulb 24 V /2W 02
Annexure-3 SPECIFICATION FOR LATHE NH 32/3000 (for items from Sr. 67 to Sr. 110 in Indent) Sr. Specification of Parameter Parameter Value 1.0 Capacity 1.1 Height of centers (nominal) (mm) 320 1.2 Type of bed Induction Hardened, Straight Gap bed 1.3 Swing over bed (mm) 640 1.4 Swing over carriage wings (mm) 615 1.5 Swing over cross slide (mm) 420 1.6 Width of bed (mm) 415 1.7 Distance between centers (mm) 3000 1.8 Swing in gap (mm) 870 1.9 Carriage travel (mm) 2700 2.0 Head-Stock: The Head stock is made from High quality cast iron Grade-4.The box type construction with heavy front wall to ensure stability and precision and to resist heavy cutting forces. a) All main drive gears of the head stock shall be of alloy steel hardened and profile ground. The gears shall not be less than Class-5 quality. b) Lubrication system shall be provided by a separate pump in headstock. The main spindle shall be free from vibration at all speeds and loads. c) The feed box shall be totally enclosed and provided with universal gear box. d) The Main spindle shall be of good quality C2R grade forged Steel and hardened / ground with surface finish 0.8 micron e) Spindle and other parts rotating with peripheral speed of more than 3 m/sec. shall be dynamically balanced. f) Hydraulic operated breaking system for quick stoppage of spindle shall be provided. g) Main Spindle must be supported on pre-loaded high precision taper roller bearings of reputed make GAMET/TIMKEN and must be are of precision class not less than P6. 2.1 Spindle nose/bore (mm) Standard A2-8/80 2.2 Spindle socket taper ASA 350 2.3 Speed Range Standard 16 from 32-1632 forward and 7 from 48-1150 reverse 3.0 Feeds and Threads 3.1 Feed range longitudinal(mm/rev) 60 from 0.04-2.24 (Indicated feeds 27 Nos.) 3.2 Feed range cross(mm/rev) 60 from 0.02-1.12 (Indicated feeds 27 Nos.) 3.3 Lead screw pitch(mm) 6 3.4 Metric threads(mm) 48 from 0.5-28 3.5 Inch threads(tpi) 60 from 56-1 3.6 Module threads(mm) 40 from 0.25-14 4.0 Carriage: a) Carriage guide ways shall be precision machined and hand scrapped to suit the hardened bed guide ways. b) Lead screw shall be of suitable material, thread milled and finish cut. Pitch accuracy shall be 0.03 mm or better over a length of 300 mm.
c) Automatic feeds for sliding motion shall be provided. Automatic stop for longitudinal feed shall be provided. Suitable interlocking arrangement against simultaneous engagement of feed shaft and lead screw shall be provided. d) Cross slide guide ways shall be precision machined and hand scrapped to suit the saddle guide ways. e) Cross feed screw shall be provided with backlash eliminator system for accurate machining. The cross feed screw nut is of two pieces construction with a wedge in between, to eliminate the backlash between screw and nut. f) Automatic feeds for surfacing motion shall be provided. 4.1 Cross slide travel(mm) 300 4.2 Top slide travel(mm) 150 4.3 Tool shank size (mm X mm) 25 X 25 5.0 Tail-Stock: a) Tailstock casting is of high quality cast iron of Grade-4. b) Tailstock bore shall be honed to ensure easy and accurate sliding of the sleeve. c) Tailstock sleeve bore shall be of case hardening steel with MT5 taper d) Tailstock shall be movable easily on the bed in de-clamped condition by manually. 5.1 Sleeve diameter/taper(mm) 90 / MT5 5.2 Sleeve Travel(mm) 200 6.0 General 6.1 Power of main motor(kw) 11 6.2 Power of coolant pump motor(kw) 0.1 6.3 Floor space (mm X mm) 1176 X 4465 6.4 Colour Standard Apple Green 6.5 The Machine bed shall be a casting of robust construction heavily ribbed for stability, rigidity and vibration free operation. 6.6 Casting shall be made of high quality cast iron equivalent to Mechanite Grade G-4. The saddle slideways shall be provided with suitable wipers to avoid entry of chips and swarf. 6.7 Guideways shall be hardened and ground to a hardness of minimum 48 HRC. 6.8 The machine is provided with quick change tool post with size 25 x 25 mm. 6.9 Suitable chip collecting tray for swarf disposal shall be provided. 6.10 Short spindle and shafts for maximum drive rigidity. 6.11 All drive gears in headstock shall be case hardened and ground. 6.12 Recirculating pressure lubrication for minimum thermal deformation. 6.13 Test & Fitment certificate shall be supplied along with delivery of the material. 6.14 Material covered under thisindent/po shall be guaranteed for quality of material and workmanship for the period of 12 months from the date of receipt/inspection or 18 months from the date of dispatch whichever is earlier. List of Special Accessories NH 32/3000: Sr. Item Description Unit Qty. 1) 3 Jaw Self centering chuck diameter 250 mm with one set of hardened 01 jaws reversible for external and internal chucking. 2) Universal face plate diameter 550 mm 01 3) Swarf tray and coolant assembly 01 4) Splash Guard 01 5) Machine lamp 24 volt without bulb. 01 6) Steady rest 135-250 mm 01 7) Rotating centre with MT5 shank. 01
Sr. Item Description Unit Qty. 8) Special tool kit consisting of turning tools, parting tools, external Set 01 threading tools with a set of corresponding inserts 9) Longitudinal stop 01 10) Stop Roll 01 11) Taper turning attachment 01 12) Star Delta Starter 01 13) Follow rest 8-80 mm 01 14) Normal Running Spares for 5 years Set 01 15) Operation & Maintenance &spares Parts Manual Set 01 16) Foundation bolts and leveling plates with adjusting bolts Set 01 17) First Fill of Oil, Lubricant & Coolant 01 18) Commissioning Services 01 Set of normal running spares for 5 years for NH 32/3000 Sr. Description Unit Qty. 1) V Belt - 42" (for NH 22/26 and NH32 low speed). One set consists of four Set 01 belts. 2) Oil Seal 16 / 28 X 7 01 3) Oil Seal 55 / 80 X 10 01 4) Oil Seal 45 / 60 X 7 01 5) Oil Seal 30 / 42 X 7 01 6) Oil Seal 35 / 62 X 10 01 7) Packing HO 75 Nos. 02 8) Felt 5 X 4 X 1000 01 9) Stop 01 10) Compression Spring 0.8 X 6 X 25 01 11) Pin B3 01 12) Special Spring 01 13) Pinion Shaft Nos. 02 14) Shear Pin Nos. 05 15) Pick off gear 30 teeth 01 16) Pick off gear 60 teeth 01 17) Pick off gear 72 teeth 01 18) Half round Rivet Nos. 06 19) Aluminium Key Nos. 04 20) V Seal Ring V85A 01 21) U Packing NA 150 (50 x 40 x 7) 01 22) O Ring R159 Nos. 02 23) O Ring diameter 12 x 2 01 24) O Ring diameter 65 x 3 01 25) A.B.Contactor 9A 01 26) A.B. Contactor 2NO+2NC 01 27) A.B.Contactor 12A 01 28) Limit Switch LTPR 01 29) Aux. Contactor Block 2NO 01 30) Aux. Contactor Block 2NC 01
Sr. Description Unit Qty. 31) Bulb PE 28W 01 32) Bulb 24V/2W 01