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BK2-Bellows coupling with clamping hub

Easy to mount
Optional: bolt tensioning system in size 800 and up
Light weight and low moment of inertia

DetailsParameter

Features
- Easy to mount
- Optional: bolt tensioning system in size 800 and up
- Light weight and low moment of inertia
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 series 80 – aluminum, optionally steel
  - from series 150 – 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

	BK2 15			BK2 30			BK2 60			BK2 80			BK2 150			BK2 200			BK2 300			BK2 500			BK2 800		BK2 1500		BK2 4000	BK2 6000	BK2 10000
Model	BK2 15 59	BK2 15 66	BK2 15 99	BK2 30 69	BK2 30 77	BK2 30 113	BK2 60 83	BK2 60 93	BK2 60 130	BK2 80 94	BK2 80 106	BK2 80 143	BK2 150 95	BK2 150 107	BK2 150 144	BK2 200 105	BK2 200 117	BK2 200 163	BK2 300 111	BK2 300 125	BK2 300 200	BK2 500 133	BK2 500 146	BK2 500 169	BK2 800 140	BK2 800 179	BK2 1500 166	BK2 1500 230	BK2 4000 225	BK2 6000 252	BK2 10000 288
Rated torque(Nm)	15	15	15	30	30	30	60	60	60	80	80	80	150	150	150	200	200	200	300	300	300	500	500	500	800	800	1,500	1,500	4,000	6,000	10,000
Coupling length(mm)	59	66	99	69	77	113	83	93	130	94	106	143	95	107	144	105	117	163	111	125	200	133	146	169	140	179	166	230	225	252	288
Bore diameter from ? to ? H7(mm)	8-28	8-28	8-28	10-30	10-30	10-30	12-35	12-35	12-35	14-42	14-42	14-42	19-42	19-42	19-42	22-45	22-45	22-45	24-60	24-60	24-60	35-60	35-60	35-60	40-75	40-75	50-80	50-80	50-90	60-140	70-180
Outside diameter(mm)	49	49	49	55	55	55	66	66	66	81	81	81	81	81	81	90	90	90	110	110	110	124	124	124	134	134	157	157	200	253	303
Torsional stiffness(103 Nm/rad）	20	15	14	39	28	27	76	55	54	129	85	84	175	110	97	191	140	135	450	350	340	510	500	400	780	711	1,304	1,180	3,400	5,700	10,950

Next：BKH-Bellows coupling with split clamping hub

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