The BS series Cam Clutches are intended for applications where reverse rotation of the slow speed conveyor head shaft is to be prevented (backstopping) .

Catalogue of freewheel backstop Clutch for your choice

BS160HS-BS450HS backstop Clutch Data Sheet

Model	Torque	Max.	Drag	A	B	C	PCD	E	S	H-M Size× Pitch× No.of Tapped HoleS	Grease	Q’ty
	Capacity	Overrunning	Torque				D				Filler Hole	Grease
	(N·m)	(r/min)Inner Race	(N·m)								(Size)	(kg)
	(N·m)	(r/min)Inner Race	(N·m)								(Size)
BS160HS	39200	350	34.3	180	360	175	315	220	40	M20×P2.5×10	PT 1/4	0.23
BS200HS	61700	250	44.1	205	430	200	380	260	40	M22 ×P2.5×8	PT 1/4	0.31
BS220HS	102000	200	73.5	330	500	325	420	290	40	M20 ×P2.5×16	PT 1/4	1.3
BS250HS	147000	170	93.1	370	600	365	530	330	50	M24 ×P3.0×16	PT 1/4	1.7
BS270HS	204000	160	98	385	650	380	575	370	50	M24 ×P3.0×16	PT 1/4	2
BS300HS	294000	150	108	425	780	420	690	470	60	M30 ×P3.5×16	PT 1/4	3.6
BS350HS	392000	110	157	440	930	480	815	535	70	M36 ×P4.0×16	PT 1/4	4.1
BS425HS	735000	85	216	570	1030	580	940	635	70	M36 ×P4.0×18	PT 1/4	6.9
BS450HS	980000	80	245	570	1090	600	990	645	80	M42 ×P4.5×18	PT 1/4	7.2

BS30-BS135 backstop Clutch Data Sheet

Model	Torque	Max overrunning	Drag Torque (N-m)	A	B	C	PCD	E	S	H-M Size× Pitch ×No.of Tapped Holes
Model	Capacity (Nm)	(r/min) Inner race	Drag Torque (N-m)	A	B	C	D	E	S	H-M Size× Pitch ×No.of Tapped Holes
BS30	294	350	0.58	64	90	64	80	45	13	M 6 ×P1.0×4
BS50	784	300	0.98	67	125	67	110	70	16	M 8 ×P1.25×4
BS65	1570	340	3.92	90	160	85	140	90	20	M10 ×P1.5×6
BS75	2450	300	5.88	90	170	85	150	100	20	M10 ×P1.5×6
BS85	5880	300	7.84	115	210	110	185	115	30	M12 ×P1.75×6
BS95	7840	250	9.8	115	230	110	200	130	30	M14 ×P2.0× 6
BS110	10800	250	14.7	115	270	110	220	150	30	M16 ×P2.0× 6
BS135	15700	200	19.6	135	320	130	280	180	30	M16 ×P2.0× 8

Bore size and Weight of backstop Clutch

New JIS	OldJIS	Bore Diameter
Keyway	Keyway	Range	W. Min	W.Max
JISB1301-1996	JISB1301-1959	(mm)	(kg)	(kg)
ISO R773
BS30-30J	BS30-30E	20to30	2.3	2.1
BS50-45J	BS50-45E	30to50	4.7	4
BS50-50J	BS50-50E	30to50	4.7	4
BS65-40J	BS65-40E	40to65	13	11.5
BS65-45J	BS65-45E
BS65-50J	BS65-50E
BS65-55J	BS65-55E
BS65-60J	BS65-60E
BS65-65J	BS65-65E
BS75-60J	BS75-60E	50to75	14.7	13.1
BS75-65J	BS75-65E
BS75-70J	BS75-70E
BS75-75J	BS75-75E
BS85-70J	BS85-70E	60to85	27.2	24.7
BS85-75J	BS85-75E
BS85-80J	BS85-80E
BS85-85J	BS85-85E
BS95-80J	BS95-80E	70to95	32.2	29.4
BS95-85J	BS95-85E
BS95-90J	BS95-90E
BS95-95J	BS95-95E
BS110-85J	BS110-85E	80to110	38.6	34.2
BS110-95J	BS110-95E
BS110-100J	BS110-100E
BS110-105J	BS110-105E
BS110-110J	BS110-110E
BS135	BS135	90to135	76.1	68
BS160HS	BS160HS	100to160	120	103
BS200HS	BS200HS	100to200	200	163
BS220HS	BS220HS	150to220	390	338
BS250HS	BS250HS	175to250	760	689
BS270HS	BS270HS	200to270	850	774
BS300HS	BS300HS	230to300	1,400	1,300
BS350HS	BS350HS	250to350	2,300	2,120
BS425HS	BS425HS	325to425	3,300	2,960
BS450HS	BS450HS	350to450	3,700	3,400