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Drawbar forces in this document are sourced from international standards and gripper manufacturers. This information is for reference only: For specifications applicable to a specific machine, the machine builder should be contacted. Depending on the application, it is typical for a machine builder to design a machine for higher or lower forces.
Steep Taper – ASME B5.50 (CAT/ANSI)Note: ASME B5.50 is commonly referred to as CAT/ANSI. Forces shown are "Suggested Drawbar Pull Force".
• Steep Taper CAT30: 5340 N / 1200 lb-f
• Steep Taper CAT40: 10230 N / 2300 lb-f
• Steep Taper CAT45: 17790 N / 4000 lb-f
• Steep Taper CAT50: 22240 N / 5000 lb-f
• Steep Taper CAT60: 57830 N / 13000 lb-f
Steep Taper – BERG SSK GripperNote: Forces are maximum allowable for the gripper. These forces should be considered high for the machine taper.
• Steep Taper SK30: 10000 N / 2250 lb-f
• Steep Taper SK40: 18000 N / 4050 lb-f
• Steep Taper SK45: 25000 N / 5600 lb-f
• Steep Taper SK50: 35000 N / 7870 lb-f
• Steep Taper SK60: 70000 N / 15740 lb-f
HSK – ISO 12164-1Note: Forces shown are "Recommendations for use and application. Forces will ensure that the portion acting on the flange surface is never less than 75% of the total. Lower clamping forces can be sufficient when operational loads are low (e.g. cutting forces in finish machining.) Conversely, higher clamping forces can be required when high operational loads are encountered (e.g. cutting and feed forces in heavy machining)."
• HSK-A/C/E 25: N/A
• HSK-A/C 32: 5000 N / 1120 lb-f
• HSK-A/C 40: 6800 N / 1530 lb-f
• HSK-A/C 50: 11000 N / 2470 lb-f
• HSK-A/C 63: 18000 N / 4050 lb-f
• HSK-A/C 80: 28000 N / 6290 lb-f
• HSK-A/C 100: 45000 N / 10120 lb-f
• HSK-A/C 125: 70000 N / 15740 lb-f
• HSK-A/C 160: 115000 N / 25850 lb-f
HSK – BERG HK GripperNote: Forces are maximum allowable for the gripper. These forces should be considered high for the machine taper.
• HSK-A/C/E 25: N\A
• HSK-A/C 32: 6000 N / 1350 lb-f
• HSK-A/C 40: 7000 N / 1570 lb-f
• HSK-A/C 50: 15000 N / 3370 lb-f
• HSK-A/C 63: 22000 N / 4950 lb-f
• HSK-A/C 80: 35000 N / 7870 lb-f
• HSK-A/C 100: 52000 N / 11690 lb-f
• HSK-A/C 125: N/A
• HSK-A/C 160: N/A
HSK – BERG HSH GripperNote: The BERG HSH gripper is designed for very high clamping force machines. Forces shown are maximum allowable for the gripper.
• HSK-A/C/E 25: 2500 N / 560 lb-f
• HSK-A/C 32: 6000 N / 1350 lb-f
• HSK-A/C 40: 10000 N / 2250 lb-f
• HSK-A/C 50: 20000 N / 4500 lb-f
• HSK-A/C 63: 40000 N / 8990 lb-f
• HSK-A/C 80: 55000 N / 12360 lb-f
• HSK-A/C 100: 75000 N / 16860 lb-f
• HSK-A/C 125: 100000 N / 22480 lb-f
• HSK-A/C 160: 150000 N / 33720 lb-f
Useful InformationDrawbar forces are typically measured in Newtons (N), kilo Newtons (1000 N), and pounds-force (lb-F). It is incorrect to refer to drawbar force in pounds (lb) or kilograms (kg) (forces due to gravity), or foot-pounds (a torque).
Conversion factors:
Newtons (N) x 0.001 = kN (kilonewton)
Newtons (N) x 0.2248 = lb-f (pounds force)
Newtons (N) x 0.102 = kp (kilopond)
We represent Berg Spanntechnik in the Americas. However, we can identify many different grippers. Contact us directly if more information is needed.
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