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BKC | Compact Clamping Hub Coupling

The BKC coupling is designed with a single ISO 4762 radial clamping screw per hub.
This is a compact, easy mount coupling with a low moment inertia rating. It's compact form makes it ideal for applications where space is limited. It has a wide operating temperature range from -30 to 100 °C There is absolutely no backlash due to the frictional clamp type connection. These couplings have an infinite lifespan and are maintenance-free if the technical ratings are not exceeded.
The bellows are made of highly flexible high-grade
 stainless steel (See table for hub materials). R+W's BKC is made to operate at speeds up to 10,000 rpm, in excess of 30,000 available with a finely balanced version. Custom designs with varied tolerances, key-ways, non-standard material, bellows and ATEX designs are available upon request.
Self opening clamp system optional: Loosening the clamping screw applies force to the pin, which will force the clamp into the open position for easy mounting and dismounting.

BKC Diagram

BKC Series Variants

*See above picture for reference

ItemTorque(Nm)Length (mm)Fit Length (mm)I.D. possible Ø - Ø H7 (mm)O.D. (mm)MomentInertiaWeight (kg)TorsionStiffnessAxial(mm)Lateral(mm)Angular(deg)AxialSpringStiffness(N/mm)LateralSpringStiffness(N/mm)Fastening screwTorque (Screw)Distance (mm) FDistance (mm) GHub Material
BKC-15154816,58-28490,050,132310,2130315M5817,56,5Aluminium

BKC-3030582112-32560,10,213110,2150366M615207,5Aluminium

BKC-6060672314-35660,260,37721,50,2167679M840239,5Aluminium

BKC-1501507827,519-42820,650,7214120,2177960M10752711Aluminium

BKC-300300943424-601106,33,2615720,211122940M121203913Steel

BKC-5005001003432-7512393,522902,50,21722200M121254513Steel



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