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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Bellows Coupling Model BK5 with tapered press-fit connection

Series from 15 - 1500 Nm

Data table and Downloads Bellows Coupling BK5 Series 15 - 1500 Nm

Model BK5		Series
		15		30		60		80		150		300		500		800	1500
Rated torque (Nm)	T_KN	15		30		60		80		150		300		500		800	1500
Overall length (mm)	A^+0.5	60	67	71	79	85	95	94	106	95	107	114	128	136	149	150	172
Outer diameter (mm)	B	49		55		66		81		81		110		124		133	157
Fit length (mm)	C₁	22		27		32		36		36		43		51		45	55
Fit length (mm)	C₂	28		33		39		43		43		52		61		74	94
Inner diameter possible from Ø to Ø H7 (mm)	D₁	8-28		10-30		12-32		14-42		14-42		24-60		35-60		40-75	50-80
Inner diameter possible from Ø to Ø H7 (mm)	D₂	8-22		10-25		12-32		14-38		14-38		24-58		35-60		40-62	50-75
ISO 4762 screw	E	M5		M6		M8		M10		M10		M12		M16		2x M16*	2x M20*
Tighting torque (Nm)	E	8		15		40		50		70		130		200		250	470
Distance between centers (mm)	F	17		19		23		27		27		39		41		2x 48*	2x 55*
Distance (mm)	G	6.5		7.5		9.5		11		11		13		16.5		18	22.5
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		0.5-1.5		1.0-2.0		1.0-2.5	0.50-1.50
Axial recovery of coupling max. (N)		20	12	50	30	70	45	48	32	82	52	157	106	140	96	200	650
Mass moment of inertia (10^-3 kgm²)	J_ges	0.07	0.08	0.14	0.15	0.23	0.26	0.65	0.67	2.2	2.4	7.4	7.9	13.7	14.4	26.2	51.4
approx. weight (kg)		0.1	0.1	0.3	0.3	0.4	0.4	0.9	0.9	1.8	1.8	4	4	6.5	6.7	8.2	15.3
Torsional stiffness (10³ Nm/rad)	C_T	10	8	20	14	38	28	65	43	88	55	225	175	255	245	400	650
Axial* (mm)	max.	0.5	1	0.5	1	0.5	1	1	2	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	0.2	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	920	290	1550	435	3750	1050	2500	840	2000	3600
Downloads Short Version		15		30		60		80		150		300		500		800	1500
2D-DXF (ZIP folder)
3D-EXE (Viewer)
3D-STEP (ZIP folder)
Downloads Long Version		15		30		60		80		150		300		500		800	1500
2D-DXF (ZIP folder)
3D-EXE (Viewer)
3D-STEP (ZIP folder)

(1 Nm = 8.85 in lbs) *allowed following maximum pretensioning *two screws each hub, 180° apart
Higher toques on request max. angular misalignment see Bellow Coupling BK1

Last Update: 24.11.2008