Needle Roller Bearings

Roller Clutches

Manufactured similarly to the drawn cup bearings, roller clutches utilize the same low profile sectional height. The units are compact, light weight and operate directly on a hardened shaft. Proper mounting is easily accomplished with a simple press fit in the housing. Each unit consists of a thin-walled, drawn outer ring with a series of ramps on the inside diameter, plastic cages, springs and needle rollers.

Drawn cup roller clutches transmit torque between the shaft and the housing in one direction and allow free overrun in the opposite direction. When transmitting torque, the shaft or the housing can be the input member. The individual spring retention of the needle rollers ensures constant contact between the shaft, the needle rollers and the ramps. Applications are generally described as indexing, backstopping or overrunning.

ROLLER CLUTCH INTERCHANGE
						INA		Koyo
DIMENSIONS						Clutch Designtation
F_w		D		C		Plastic Springs	Steel Springs	Plastic Springs	Steel Springs
inch	mm	inch	mm	inch	mm	Plastic Springs	Steel Springs	Plastic Springs	Steel Springs
0.118	3	0.256	6.5	0.236	6	HF0306KF
0.118	3	0.256	6.5	0.315	8	HFL0308KF
0.118	3	0.256	6.5	0.315	8	HFL0308KFR
0.157	4	0.315	8	0.236	6	HF0406KF
0.157	4	0.315	8	0.315	8	HFL0408KF
0.236	6	0.394	10	0.472	12	HF0612KF	HF0612		FCS-6
0.236	6	0.394	10	0.472	12	HF0612KFR	HF0612R		FC-6
0.236	6	0.394	10	0.591	15	HFL0615KF	HFK0615	HFL0615
0.236	6	0.394	10	0.591	15	HFL0615KFR		HFL0615R
0.250	6.35	0.437	11.112	0.500	12.7	HFZ040708KF	HFZ040708		RC-040708
0.315	8	0.472	12	0.472	12	HF0812KF	HF0812		FCL-8-K
0.315	8	0.472	12	0.472	12	HF0812KFR	HF0812R
0.315	8	0.551	14	0.472	12				FC-8
0.315	8	0.551	14	0.787	20				FCB-8
0.315	8	0.472	12	0.236	6	HFL0806KFR
0.315	8	0.472	12	0.866	22	HFL0822KF	HFL0822
0.315	8	0.472	12	0.866	22	HFL0822KFR	HFL0822R
0.375	9.525	0.625	15.875	0.500	12.7		HFZ061008		RC-061008
0.375	9.525	0.625	15.875	0.875	22.22		HFLZ061014		RCB-061014
0.394	10	0.551	14	0.472	12	HF1012KF	HF1012		FCL-10-K
0.394	10	0.551	14	0.472	12	HF1012KFR	HF1012R
0.394	10	0.630	16	0.787	20				FCB-10
0.394	10	0.551	14	0.866	22	HFL1022KF	HFL1022
0.394	10	0.551	14	0.866	22	HFL1022KFR	HFL1022R
0.394	10	0.630	16	0.472	12				FC-10
0.472	12	0.709	18	0.630	16		HF1216		FC-12
0.472	12	0.709	18	1.024	26		HFL1226		FCB-12
0.500	12.7	0.750	19.05	0.500	12.7		HFZ081208		RC-081208
0.500	12.7	0.750	19.05	0.875	22.22		HFLZ081214		RCB-081214
0.551	14	0.787	20	0.630	16		HF1416		FC-14-K
0.551	14	0.787	20	1.024	26		HFL1426
0.625	15.875	0.875	22.225	0.625	15.88				RC-101410
0.625	15.875	0.875	22.225	1.000	25.4		HFL101416		RCB-101416
0.630	16	0.866	22	0.630	16		HF1616		FC-16
0.630	16	0.866	22	1.024	26		HFL1626		FCB-16
0.709	18	0.945	24	0.630	16		HF1816
0.709	18	0.945	24	1.024	26		HFL1826
0.750	19.05	1.000	25.4	0.625	15.88				RC-121610
0.750	19.05	1.000	25.4	1.000	25.4				RCB-121616
0.787	20	1.024	26	0.630	16		HF2016		FC-20
0.787	20	1.024	26	1.024	26		HFL2026		FCB-20
0.984	25	1.260	32	0.787	20		HF2520		FC-25
0.984	25	1.260	32	1.181	30		HFL2530		FCB-25
1.000	25.4	1.313	33.338	0.625	15.88				RC-162110
1.000	25.4	1.313	33.338	1.063	26.99				RCB-162117
1.181	30	1.457	37	0.787	20		HF3020		FC-30
1.181	30	1.457	37	1.181	30		HFL3030		FCB-30
1.378	35	1.654	42	0.787	20		HF3520		FCS-35
1.378	35	1.654	42	1.181	30		HFL3530
***This chart is intended as a reference only. The users should consult with the listed manufacturers’ catalogs to establish dimensional interchangeability. NPB cannot be held responsible for any errors contained herein.