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BK1 | Metal Bellows Coupling

The BK1 Flange Mount coupling is intended for special design applications. The hubs have six threaded metric mounting holes and the I.D. and O.D. are concentrically machined to ISO H7 tolerances. Hubs with custom bore size, mounting threads and bolt circles are available upon request.
It has a broad operating temperature range of -30 to 12 °C There is absolutely zero backlash due to the fixed bolted connection. These couplings are maintenance-free for life if the technical limits are not exceeded. The bellows are made of highly flexible high grade stainless steel and the hubs are made from steel or aluminum (See table)
The high level of quality inherent to the BK1 make it able to tolerate overloads up to 1.5 times the value specified. Speeds up to 10,000 rpm are acceptable (In excess of 10,000 with finely balanced version).
*Custom designs with varied tolerances, key-ways, non-standard material, bellows and ATEX designs are available upon request.

METAL BELLOWS COUPLINGS WITH FLANGE
MOUNTING FOR SPECIAL DESIGN
APPLICATION

15 - 10,000 NM

BK1 Diagram

BK1 Series Variants

*See above picture for reference

ItemTorque(Nm)LengthOD Bellows(mm)FitLength/ThreadDepth(mm)I.D. H7(mm)FasteningThreadsBoltCircleDiameterO.D. F7MomentInertia 10-3Weight(Kg)TorsionStiffnessAxial(mm)Lateral(mm)Angular(deg)AxialSpringStiffness(N/mm)LateralSpringStiffness(N/mm)
BK1-151530 | 37497,5256 x M535490,07 | 0,080,1520|151 | 20,15 | 0,21 | 1,525 | 15475|137

BK1-303036 | 445510286 x M537550,14 | 0,150,239|281 | 20,2 | 0,251 | 1,550 | 30900|270

BK1-606043 | 536611386 x M646660,30 | 0,320,376|551,5 | 20,2 | 0,251 | 1,572 | 481200|420

BK1-15015050 | 628113506 x M662810,90 | 0,950,6175|1102 | 30,2 | 0,251 | 1,582 | 521550|435

BK1-20020053 | 659014,5586 x M670901,30 | 1,400,8191|1402 | 30,25 | 0,31 | 1,590 | 602040|610

BK1-30030056 | 7011015656 x M8801101,95 | 2,101,35450|3502,5 | 3,50,25 | 0,31 | 1,5105 | 713750|1050

BK1-50050064 | 7712416706 x M8941243,0 | 3,41,8510|5002,5 | 3,50,3 | 0,351 | 1,570 | 482500|840

BK1-8008008113318756 x M10901334,31,97803,50,351,51002000

BK1-1500150010015722856 x M1611015710,63,313043,50,351,53203600

BK1-40004000145200301006 x M20140200468,934003,50,41,55656070

BK1-60006000138253301458 x M2019025313213,9570030,41,5103019200

BK1-1000010000150303361908 x M2423430335023,71095030,41,598521800



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