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Metal Bellows Couplings BK- rigid Shafts Couplings

Bellows coupling model BK2 with clamping hub

Model BK2		Series
		15		30		60		80		150		200		300		500		800		1500
Rated torque (Nm)	TKN	15		30		60		80		150		200		300		500		800		1500
Overall length (mm)	A	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)	D1/2	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)	Jges	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)	CT	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)	Ca	25	15	50	30	72	48	48	32	82	52	90	60	105	71	70	48	100		320
lateral spring stiffness (N/mm)	Cr	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)

(1Nm = 8.85 in lbs),      max. angular misalignment see Shaft Coupling BK1,      *two screws each hub, 180° apart