Metal Bellows Couplings BK- rigid Shaft Couplings

Please select a Metal Bellows Coupling:

MODEL SERIES BK	BK1	BK2 / BKC / BKL	BKH	BK3	BK4	BK5	BK6	BK7	BK8
	General \| Technical information \| 2D and 3D download

Series from 2 - 500 Nm

Data table and Downloads Bellows Coupling BKL Series 2 - 500 Nm

Model BKL		Series
		2	4.5	10	15	30	60	80	150		300		500
Rated torque (Nm)	T_KN	2	4.5	10	15	30	60	80	150		300		500
Overall length (mm)	A	30	40	44	58	68	79	92	92		109		114
Outer diameter (mm)	B	25	32	40	49	56	66	82	82		110		123
Fit length (mm)	C	10.5	13	13	21.5	26	28	32.5	32.5		41		42.5
Inner diameter possible from Ø to Ø H7 (mm)	D_1/2	4-12.7	6-16	6-24	8-28	10-32	14-35	16-42	19-42		24-60		35-62
Fastening screws ISO 4762	E	M3	M4	M4	M5	M6	M8	M10	M10		M12		M16
Tighting torque of the fastening screw (Nm)	E	2.3	4	4.5	8	15	40	70	85		120		200
Distance between centers (mm)	F	8	11	14	17	20	23	27	27		39		41
Distance (mm)	G	4	5	5	6.5	7.5	9.5	11	11		13		17
Mass moment of inertia (10^-3 kgm²)	J_ges	0.002	0.007	0.016	0.065	0.12	0.3	0.75	1.8	0.8	7.5	3.1	11.7	4.9
Hub material (standard) (steel on request)		Al	Al	Al	Al	Al	Al	Al	Steel optional Al		Steel optional Al		Steel optional Al
Approx. weight (kg)		0.02	0.05	0.06	0.16	0.25	0.4	0.7	1.7	0.75	3.8	1.6	4.9	2.1
Torsional stiffness (10³ Nm/rad)	C_T	1.5	7	9	23	31	72	80	141		157		290
Axial (mm)	max.	0.5	1	1	1	1	1.5	2	2		2		2.5
Lateral (mm)	max.	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20		0.20		0.20
Axial spring stiffness (N/mm)	C_a	8	35	30	30	50	67	44	77		112		72
Lateral spring stiffness (N/mm)	C_r	50	350	320	315	366	679	590	960		2940		1450
Downloads		2	4.5	10	15	30	60	80	150		300		500
2D-DXF (ZIP folder)
3D-EXE (Viewer)
3D-STEP (ZIP folder)