Metal Bellows Couplings BK

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MODEL SERIES BK	BK1	BK2, BKC and BKL	BKH	BK3	BK4	BK5	BK6	BK7	BK8	BKM
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Series from 15 - 1500 Nm

Data table and Downloads Bellows Coupling BK6 Series 15 - 1500 Nm

Model BK6		Series
		15		30		60		150		300		500		800	1500
Rated torque (Nm)	T_KN	15		30		60		150		300		500		800	1500
Overall length (mm)	A^+0.5	58	65	68	76	79	89	97	109	113	127	132	145	140	158
Outer diameter (mm)	B	49		55		66		81		110		124		133	157
Fit length (mm)	C₁	13.5		16.5		18		23.5		27		32		42	53
Fit length (mm)	C₂	29		34		39		49.5		59		68		74	90.5
Inner diameter possible from Ø to Ø H7 (mm)	D₁	10-22		12-24		12-32		15-40		24-56		30-60		40-62	50-75
Inner diameter possible from Ø to Ø H7 (mm)	D₂	10-22		12-24		12-32		15-40		24-56		30-60		40-62	50-75
6 x ISO 4762 screw	E	M4		M5		M5		M6		M8		M8		M10	M12
Tighting torque (Nm)	E	3.5		6.5		8		12		30		32		55	110
Ø Diameter of clamping cone (mm)	F	46.5		51		60		74		102		114		126	146
Distance (mm)	G	9.5		10.5		11.5		17.5		20		23		27	32
Axial Pretensioning approx. (mm)	H	0.2-1.0		0.5-1.0		0.5-1.5		0.5-1.5		0.5-1.5		1.0-2.0		1.0-2.0	0.5-1.5
Axial recovery of coupling max. (N)		20	12	50	30	70	45	82	52	157	106	140	96	400	650
Moment of inertia (10^-3 kgm²)	J_ges	0.1	0.12	0.2	0.25	0.4	0.45	2.0	2.5	5.4	6.1	8.4	9.1	19.5	44
Approx. weight (kg)		0.3	0.32	0.5	0.52	0.82	0.84	1.6	1.7	4.1	4.2	6.0	6.3	9.4	16.2
Torsional stiffness (10³ Nm/rad)	C_T	10	8	20	14	38	28	88	55	225	175	255	245	400	650
Axial* (mm)	max.	0.5	1	0.5	1	0.5	1	1	2	1.5	2	2.5	3.5	3	2
Lateral (mm)	max.	0.15	0.2	0.2	0.25	0.2	0.25	0.2	0.25	0.25	0.3	0.3	0.35	0.35	0.35
Lateral spring stiffness (N/mm)	C_r	475	137	900	270	1200	420	1550	435	3750	1050	2500	840	2000	3600
Downloads Short Version		15		30		60		150		300		500		800	1500
2D-DXF (ZIP folder)
3D-EXE (Viewer)
3D-STEP (ZIP folder)
Downloads Long Version		15		30		60		150		300		500		800	1500
2D-DXF (ZIP folder)
3D-EXE (Viewer)
3D-STEP (ZIP folder)

Missing bellow values see Bellow Coupling BK1 Higher torques on request
(1 Nm = 8.85 in lbs) *allowed following maximum pretensioning

Last Update: 24.11.2008