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BKL | Metal Bellows Coupling

With Clamping Hubs

The BKL coupling is designed with a single ISO 4762 radial clamping screw per hub.
This is an economically priced, easy mount coupling with a low moment inertia rating. 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 are maintenance-free for life, if the technical ratings are not exceeded.
The bellows are made of highly flexible high-grade
 stainless steel (See table for hub materials) while the hubs are aluminum. The BKL operates at speeds up to 10,000 rpm, in excess of 10,000 available with a finely balanced version. Custom designs with varied tolerances, keyways, 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.

METAL BELLOWS COUPLING
WITH CLAMPING HUB

2-500 NM

BKL Diagram1 BKL Diagram2

BKL 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
BKL-223010,54-12,7250,0020,021,50,50,21850M32,384Aluminium optional Steel

BKL-4,54,540136-16320,0070,05710,2135350M44115Aluminium optional Steel

BKL-101044136-24400,0160,06910,2130320M44,5145Aluminium optional Steel

BKL-15155821,58-28490,0650,162310,2130315M58176,5Aluminium optional Steel

BKL-3030682610-32560,120,253110,2150366M615207,5Aluminium optional Steel

BKL-6060792814-35660,30,4721,50,2167679M840239,5Aluminium optional Steel

BKL-80809232,516-42820,750,78020,2144590M10702711Aluminium optional Steel

BKL-1501509232,519-42821,8 | 0,81,7 | 0,7514120,2177960M10852711Steel optional Aluminium

BKL-3003001094124-601107,5 | 3,13,8 | 1,615720,211122940M121203913Steel optional Aluminium

BKL-50050011442,535-6212311,7 | 4,94,9 | 2,12902,50,21721450M162004117Steel optional Aluminium



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