Metal Bellows Couplings BK- rigid Shafts Couplings

Please select a Metal Bellows Coupling:

Series from 15 - 1500 Nm

Data table and Downloads Bellows Coupling BK2 Series 15 - 1500 Nm

Model BK2		Series
		15		30		60		80		150		200		300		500		800	1500
Rated torque (Nm)	T_KN	15		30		60		80		150		200		300		500		800	1500
Overall length (mm)	A^-2	59	66	69	77	83	93	94	106	95	107	105	117	111	125	133	146	140	166
Outer diameter (mm)	B	49		55		66		81		81		90		110		124		134	157
Fit length (mm)	C	22		27		31		36		36		41		43		51		45	55
Inner diameter possible from Ø to Ø H7 (mm)	D_1/2	8-28		10-30		12-35		14-42		19-42		22-45		24-60		35-60		40-75	50-80
Fastening screws ISO 4762	E	M5		M6		M8		M10		M10		M12		M12		M16		2x M16*	2x M20*
Tighting torque of the mounting screw (Nm)	E	8		15		40		50		70		120		130		200		250	470
Distance between centers (mm)	F	17		19		23		27		27		31		39		41		2x 48	2x 55
Distance (mm)	G	6.5		7.5		9.5		11		11		12.5		13		16.5		18	22.5
Mass moment of inertia (10^-3 kgm²)	J_ges	0.06	0.07	0.12	0.13	0.32	0.35	0.8	0.85	1.9	2	3.2	3.4	7.6	7.9	14.3	14.6	16.2	43
Hub material (standard) (steel on request)		Al		Al		Al		Al		Steel		Steel		Steel		Steel		Steel	Steel
approx. weight (kg)		0.16		0.26		0.48		0.8		1.85		2.65		4		6.3		5.7	11.5
Torsional stiffness (10³ Nm/rad)	C_T	20	15	39	28	76	55	129	85	175	110	191	140	450	350	510	500	780	1304
axial (mm)	max.	1	2	1	2	1.5	2	2	3	2	3	2	3	2.5	3.5	2.5	3.5	3.5	3.5
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	0.25	0.3	0.3	0.35	0.35	0.35
axial spring stiffness (N/mm)	C_a	25	15	50	30	72	48	48	32	82	52	90	60	105	71	70	48	100	320
lateral spring stiffness (N/mm)	C_r	475	137	900	270	1200	420	920	290	1550	435	2040	610	3750	1050	2500	840	2000	3600
Downloads Short Version		15		30		60		80		150		200		300		500		800	1500
2D-DXF (ZIP folder)
3D-EXE (Viewer)
3D-STEP (ZIP folder)
Downloads Long Version		15		30		60		80		150		200		300		500		800	1500
2D-DXF (ZIP folder)
3D-EXE (Viewer)
3D-STEP (ZIP folder)