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BS One Way Sprag Clutch

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BS One Way Sprag Clutch

The BS One Way Sprag Clutch is a highly reliable and compact mechanical component that serves as a robust one way sprag clutch. Its design utilizes precision-engineered sprags to allow completely free and smooth overrunning in one direction, while delivering immediate and rigid lockup for torque transmission in the opposite direction, effectively preventing any reverse rotation. This bs one way sprag clutch is engineered for seamless integration into various drive systems and is widely employed in industrial applications such as heavy-duty gearboxes, printing presses, and material handling conveyors, where dependable backstopping and precise motion control are critical for operational safety and efficiency.

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BS One Way Sprag Clutch

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Product Detail

Features:

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

1. For prevention of rotation in the reverse direction at slow speeds on conveyors or pumps.
2. Before installation, verify that the direction of rotation of the inner race of the BS Cam Clutch (shown by the arrow on the inner

race) is the same as the direction of rotation of the conveyor.
3. Securely install the torque arm to the BS Cam Clutch using bolts of strength 10.9 or higher. Make sure that the contact between

the surface of the torque arm and the side of the outer race is level and free of dust.
4. Recommended shaft tolerance is h7 or h8.

Dimensions and Capacities:

One Way Sprag Clutch Dimensions and Capacities

Model	Torque Capacity (Nm)	Max. Overrunning (r/min) Inner Race	Drag Torque (Nm)	A	B	C	PCD D	E	S	H-M Size× Pitch × No.of Tapped Holes	Weight (kg)
BS30	294	350	0.58	64	90	64	80	45	13	M 6 ×P1.0×4	2.1
BS50	784	300	0.98	67	125	67	110	70	16	M 8 ×P1.25×4	4.0
BS65	1570	340	3.92	90	160	85	140	90	20	M10 ×P1.5×6	11.5
BS75	2450	300	5.88	90	170	85	150	100	20	M10 ×P1.5×6	13.1
BS85	5880	300	7.84	115	210	110	185	115	30	M12 ×P1.75×6	24.7
BS95	7840	250	9.8	115	230	110	200	130	30	M14 ×P2.0× 6	29.4
BS110	10800	250	14.7	115	270	110	220	150	30	M16 ×P2.0× 6	34.2
BS135	15700	200	19.6	135	320	130	280	180	30	M16 ×P2.0× 8	68

Type	Torque Capacity (Nm)	Max. Overrunning (r/min) Inner race	Drag Torque (Nm)	A	B	C	PCD D	E	S	H-M T.H.S.XP-Q'ty	G.F.H. (Size)	Q. of G. (kg)
BS 160	24,500	100	34.3	135	360	130	315	220	40	M20xP2.5-10	PT 1/4	0.12
BS 200	37,200	100	44.1	150	430	145	380	265	40	M22xP2.5- 8	PT 1/4	0.14
BS 220	49,000	80	73.5	235	500	230	420	290	40	M20xP2.5-16	PT 1/4	0.8
BS 250	88,200	50	93.1	295	600	290	530	330	50	M24xP3.0-16	PT 1/4	1.1
BS 270	123,000	50	98	295	650	290	575	370	50	M24xP3.0-16	PT 1/4	1.2
BS300	176,000	50	108	295	780	290	690	470	60	M30xP3.5-16	PT 1/4	1.3
BS335	265,000	50	137	305	850	320	750	495	70	M36xP4.0-16	PT 1/4	1.4
BS350	314,000	50	157	320	930	360	815	535	70	M36xP4.0-16	PT 1/4	1.5
BS425	510,000	50	216	440	1,030	450	940	635	70	M36xP4.0-18	—	Oil 6,000ml
BS450	686,000	50	245	450	1,090	480	990	645	80	M42xP4.5-18	—	Oil 7,000ml

Mounting and Coupling:

One Way Sprag Clutch Mounting and Coupling

1. When inserting the BS Cam Clutch on the shaft, apply pressure only on the inner race. Do not tap the inner race directly with a

hammer or exert any force upon the outer race, dust seal, or dust plate.
2. Always use a parallel key for installation onto the shaft and then fix the BS Cam Clutch to the shaft with the end plate. Never use

a tapered key.
3. When installing models above BS160 (grease lubricated types), place one of the four oil plugs in
The direct bottom location. This will allow for easy drainage of the grease for cleaning.
4. While the shaft is rotating, the end of the torque arm will swing to some extent in the direction of rotation. Support the torque arm

end only in the direction of rotation, but be sure to allow it a certain amount of free swing. If the torque arm end is fixed securely

(see installation diagram), the inside of the clutch becomes twisted, and this can result in damage to the components.
5. For models BS30 to BS200, a single torque arm on one side is sufficient, but for models 220 to BS450, use two torque arms, one

on each side. Install the torque arms evenly so the force is transmitted through the center of the clutch.
6. Torque arms for the BS Cam Clutch are standardized.

Product display:

One Way Sprag Clutch