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BKM-Bellows coupling with ultra high torsional stiffness and clamping hub

Extremely compact
High torque density
High torsional stiffness

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DetailsParameter

Features
- Extremely compact
- High torque density
- High torsional stiffness
Temperature range
- -30 °C to +100 °C (-22 °F to +212 °F)
Design
- Two clamping hubs concentrically mounted to flexible bellows
- Brief overloads of up to 1.5x the rated torque are acceptable
Material
- Bellows: high grade stainless steel
- Hubs:
  - up to 400 series – aluminum
  - from series 1000 – steel
Service life
- R+W bellows couplings are fatigue resistant and wear free for an infinite service life, as long as the technical limits are not exceeded
Fit clearance
- Overall shaft / hub clearance of 0.01 – 0.05 mm
Special solutions
- Various materials, tolerances, dimensions and performance ratings available for custom applications on request
ATEX (Optional)
- For use in hazardous zones 1/21 and 2/22, the metal bellows has been authorized under directive 94/9/EG and is available with certification

	BKM 20	BKM 200	BKM 400	BKM 1000
Model	BKM 20 40	BKM 200 59	BKM 400 75	BKM 1000 89
Rated torque (Nm)	20	200	400	1,000
Coupling length (mm)	40	59	75	89
Bore diameter from ? to ? H7 (mm)	15-28	24-35	32-42	40-60
Outside diameter (mm)	49	66	82	110
Torsional stiffness (103 Nm/rad)	41.9	138	170	570
Hub material	鋁	鋁	鋁	鋼
Speed max. with G=2.5 (rpm)	80,000	60,000	50,000	40,000

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E-mail: sales@sz -windrive. com
URL: m.seisborg.com com
Address: room 406, MaoYuan building, No. 9, Songyuan Road, Guiyuan street, Luohu District, Shenzhen

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