KEYHOLE STANDOFFS AND FASTENERS BULLETIN

Transcription

1 BULLETIN SK 814

2 PEM KEYHOLE Standoffs ( SKC ) and sheet joining fasteners ( SKC-F ) are designed so that a PC board or panel can be quickly slipped into place and then removed from an assembly by simply sliding the board sideways and lifting it off. PEM KEYHOLE fasteners can save valuable time and dramatically reduce the amount of loose hardware required. SKC can be used for spacing or mounting of replaceable components. Typically, several SKC standoffs are used with one standard PEM threaded standoff which accepts a screw to secure the board or component against any unwanted movement. SKC-F is designed so that two sheets can be quickly joined flat against each other. Typically, several SKC-F fasteners are used with one standard PEM threaded F flush nut which accepts a screw to secure the sheets against any unwanted movement. SKC - Allows detachable spacing of two sheets Clinch feature mounts fastener permanently into metal sheet. Unique barrel design allows for quick attachment and detachment. Head is flush with one side of metal sheet. Makes horizontal or vertical component mounting possible. SKC-F - Allows detachable joining of two sheets Clinch feature mounts fastener permanently into metal sheet. Unique barrel design allows for quick panel-on-panel attachment and detachment. Head is flush or sub-flush with one side of metal sheet. Can be clinched into blind hole where concealed head is required. Makes horizontal or vertical component mounting possible. PEM Dimple (Registered trademark) SKC Fastener drawings and models are available at SKC-F SK-2

3 TYPE SKC DIMENSIONAL DATA PEM dimple registered trademark. PART NUMBER DESIGNATION B A C SK C H M S L Material Body Size Sheet Thickness Length Clinching profile may vary. All dimensions are in inches. METRIC UNIFIED METRIC UNIFIED Body Length L ±.005 Size - (Length in 32nds of an inch) A B C S M H Stainless Sheet ±.003 ±.003 Max. ±.003 Max. Nom. Steel SKC All dimensions are in millimeters. Body Size - Length L ± 0.13 A B C S M H Stainless Sheet (Leng th in millimeters) ± 0.08 ± 0.08 Max. ± 0.08 Max. Nom. Steel SKC TYPE SKC-F DIMENSIONAL DATA All dimensions are in inches. Stainless Steel Face Designation Sheet A B C H M N S Thickness Max. ±.003 Max. Nom. Max. ±.003 ±.003 SKC F All dimensions are in millimeters. Stainless Steel PEM dimple registered trademark. Face Designation H B N C S M Clinching profile may vary. A PART NUMBER DESIGNATION SK C F 1.5 Sheet A B C H M N S Thickness Max. ± 0.08 Max. Nom. Max. ± 0.08 ±0.08 Material Face Sheet Thickness Designation SKC F SK-3

4 APPLICATION DATA TYPE SKC TYPE SKC-F A 3 Dia. Hole A in Panel 2 A 1 Rad. A 3 Dia. Hole A in Panel 2 A 1 Rad. Location Tolerance Max. A 4 A 2 Location Tolerance Max. A 4 A 2 Hole A C 2 PANEL 2 Hole A C 2 PANEL 2 Hole B Hole Location Tolerance C 1 Hole B Hole Location Tolerance C 1 All dimensions are in inches. UNIFIED PANEL 2 Bottom Top Hole A Sheet Hardness Thickness Hole B Sheet Distance A Max. 1 A 2 A 3 A 4 Material Distance Range Thickness C (1) 1 Nom. ±.003 ±.003 C SKC.213 HRB 70 / HB ANY SKC-F.213 HRB 70 / HB (2) ANY All dimensions are in millimeters. METRIC PANEL 2 Bottom Top Hole A Sheet Hardness Thickness Hole B Sheet Distance A Max. 1 A 2 A 3 A 4 Material Distance Range Thickness C (1) 1 Nom. ± 0.08 ± 0.08 C 2 SKC 5.41 HRB 70 / HB ANY SKC-F 5.41 HRB 70 / HB (2) ANY (1) HRB - Hardness Rockwell B Scale. HB - Hardness Brinell. (2) SKC-F may also be installed into a.043 / 1.1 mm deep blind milled hole in a.062 / 1.6 mm minimum sheet thickness. SK-4

5 INSTALLATION TYPE SKC 1. Prepare properly sized mounting hole in Panel Place the barrel of the fastener through (punched side of) mounting hole and into anvil as shown in figure With installation punch and anvil surfaces parallel, apply only enough squeezing force to embed the head flush with the panel. Figure 1 PUNCH HEAD PEMSERTER Installation Tooling UNIFIED Body Size Anvil Dimension (in.) Sheet D Anvil Part Punch Part Number Number (L+M) / (L+M) +3.2 mm ANVIL METRIC Body Size Anvil Dimension (mm) Sheet D Anvil Part Punch Part Number Number For L and M see page 3. D TYPE SKC-F Through Hole Installation Procedure Figure 2 PUNCH 1. Prepare properly sized mounting hole in Panel Place the fastener into anvil hole as shown in Figure Place the (punch side of) mounting hole over the shank of the fastener. 4. With installation punch and anvil surfaces parallel, apply only enough squeezing force until flange is flush with panel. L ANVIL FLANGE Blind Hole Installation Procedure D 1. Mill a properly sized blind hole to.043 / 1.1 mm minimum depth. 2. Place the fastener into anvil hole as shown in Figure Place the panel mounting hole over the shank of the fastener. 4. With installation punch and anvil surfaces parallel, apply only enough squeezing force to embed the flange flush with the panel. Figure 3 PUNCH PEMSERTER Installation Tooling UNIFIED Sheet Anvil Dimensions (in.) Thickness L D Anvil Part Punch Part Number Number L ANVIL FLANGE METRIC Sheet Anvil Dimensions (mm) Thickness L D Anvil Part Punch Part Number Number PEMSERTER PRESSES For best results we recommend using a PEMSERTER press for installation of PEM s SKC and SKC-F fasteners. Please check our website for more information. D End Mill Information Double-ended, two-flute H.S.S. center-cutting end mills are available from stock. PennEngineering does not manufacture center-cutting end mills, but we do keep a supply in stock for your convenience. Fastener Required Size PEM End Mill Part No. SKC-F.213 CHM-213 SK-5

6 PERFORMANCE DATA (1) TYPE SKC Installation and Pushout METRIC UNIFIED METRIC UNIFIED METRIC UNIFIED H34 Aluminum.060 Cold-Rolled Steel Body Size - Installation Pushout Installation Pushout Sheet (lbs.) (lbs.) (lbs.) (lbs.) mm 5052-H34 Aluminum 1.52 mm Cold-Rolled Steel Body Size - Installation Pushout Installation Pushout Sheet (kn) (N) (kn) (N) Side-Load H34 Aluminum Cold-Rolled Steel Test Sheet Thick..040 (2) (2).060 Length s Length s Body Size - Sheet 6060 Body Size - Sheet 61.5 TYPE SKC-F Side-Load Force Max. (lbs.) Side-Load Force Max. (lbs.) Installation, Pushout and Side-Load H34 Aluminum.060 Cold-Rolled Steel Installation Pushout Side-Load Force Max. Installation Pushout Side-Load Force Max. (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) SKC-F H34 Aluminum Test Sheet Thick. 1 mm (2) 1.5 mm Length s 1.52 mm 5052-H34 Aluminum 1.52 mm Cold-Rolled Steel Installation Pushout Side-Load Force Max. Installation Pushout Side-Load Force Max. (kn) (N) (N) (kn) (N) (N) SKC-F Length s Side-Load Force Max. (N) Pushout Side Load Cold-Rolled Steel 1 mm (2) 1.5 mm Side-Load Force Max. (N) Installation Force Installation Force Side Load Pushout (1) Published installation forces are for general reference. Actual set-up and confirmation of complete installation should be made by observing proper seating of fastener as described in the installation steps. Other performance values reported are averages when all proper installation parameters and procedures are followed. Variations in mounting hole size, sheet material, and installation procedure may affect performance. Performance testing this product in your application is recommended. We will be happy to provide technical assistance and/or samples for this purpose. (2).040 / 1 mm test sheet material thickness was used for the -2 and -4 SKC standoffs due to the short length of the parts. Regulatory compliance information is available in Technical Support section of our website PennEngineering. Specifications subject to change without notice. See our website for the most current version of this bulletin. SK-6 Technical support techsupport@pemnet.com