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BK3-Bellows coupling with conical clamping hub

High clamping pressure
High torque version
Compact design

DetailsParameter

Features
- High clamping pressure
- High torque version
- Compact design
Temperature range
- -30 °C to +100 °C (-22 °F to +212 °F)
Design
- Two conical 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: 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

	BK3 15		BK3 30		BK3 60		BK3 150		BK3 200		BK3 300		BK3 500		BK3 800	BK3 1500	BK3 4000	BK3 6000	BK3 10000
Model	BK3 15 48	BK3 15 55	BK3 30 57	BK3 30 65	BK3 60 66	BK3 60 76	BK3 150 75	BK3 150 87	BK3 200 78	BK3 200 90	BK3 300 89	BK3 300 103	BK3 500 97	BK3 500 110	BK3 800 114	BK3 1500 141	BK3 4000 195	BK3 6000 210	BK3 10000 217
Rated torque (Nm)	15	15	30	30	60	60	150	150	200	200	300	300	500	500	800	1,500	4,000	6,000	10,000
Coupling length (mm)	48	55	57	65	66	76	75	87	78	90	89	103	97	110	114	141	195	210	217
Bore diameter from ? to ? H7 (mm)	10-22	10-22	12-23	12-23	12-30	12-30	15-37	15-37	15-44	15-44	24-60	24-60	24-60	24-60	30-60	35-70	50-100	60-140	70-180
Outside diameter (mm)	49	49	55	55	66	66	81	81	90	90	110	110	124	124	133	157	200	253	303
Torsional stiffness (103 Nm/rad)	20	15	39	28	76	55	175	110	191	140	450	350	510	510	780	1,304	3,400	5,700	10,950

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