The needles in these bearings roll freely in one direction, but lock to transmit torque when the rotation of the shaft is reversed. Also known as drawn-cup roller clutches. An arrow on the lip indicates the rotational direction that locks the bearings.
Single-row bearings do not support loads from any direction. To support radial loads, use with our Needle-Roller Bearings.
Triple-row bearings support radial loads.
Radial Load
Cap., lbs.
For Shaft
Dia.For
Housing IDWd.Ring
MaterialDynamicStaticMax.
Speed, rpmMax. Torque,
ft.-lbs.LubricationFor Shaft Surface
Smoothness (Ra), microinchTemp.
Range, °F Each
Single Row
Acetal Plastic Springs
1/8"9/32"1/4"Steel____34,0000.2Required16-20° to 200°2489K21$14.041/4"7/16"1/2"Steel____20,0001.5Required16-20° to 200°2489K2210.723/8"5/8"1/2"Steel____18,0004Required16-20° to 200°2489K2311.041/2"3/4"1/2"Steel____17,0006.5Required16-20° to 200°2489K2411.175/8"7/8"5/8"Steel____14,00012Required16-20° to 200°2489K511.963/4"1"5/8"Steel____12,00017Required16-20° to 200°2489K613.761"1 5/16"5/8"Steel____8,70035Required16-20° to 200°2489K718.00
301 Stainless Steel Springs
1/4"7/16"1/2"Steel____20,0001.5Required16-20° to 250°2489K2813.693/8"5/8"1/2"Steel____18,0004Required16-20° to 250°2489K2922.931/2"3/4"1/2"Steel____17,0006.5Required16-20° to 250°2489K3126.745/8"7/8"5/8"Steel____14,00012Required16-20° to 250°2489K1229.983/4"1"5/8"Steel____12,00017Required16-20° to 250°2489K1333.501"1 5/16"5/8"Steel____8,70035Required16-20° to 250°2489K1441.31
Steel Springs
6mm10mm12mmSteel____23,0001.3Required1610° to 150°6392K4119.938mm12mm12mmSteel____17,0002.3Required1610° to 150°6392K4219.7010mm14mm12mmSteel____14,0003.9Required1610° to 150°6392K4320.8812mm18mm16mmSteel____11,0009Required1610° to 150°6392K4423.2414mm20mm16mmSteel____9,50012Required1610° to 150°6392K4522.3716mm22mm16mmSteel____8,50015Required1610° to 150°6392K4622.8318mm24mm16mmSteel____7,50017Required1610° to 150°6392K4724.9720mm26mm16mmSteel____7,00021Required1610° to 150°6392K4827.1325mm32mm20mmSteel____5,50045Required1610° to 150°6392K4931.8330mm37mm20mmSteel____4,50065Required1610° to 150°6392K5138.7935mm42mm20mmSteel____3,90085Required1610° to 150°6392K5244.45
Triple Row
301 Stainless Steel Springs
3/8"5/8"7/8"Steel1,3501,10018,0004Required16-20° to 250°1553N2128.441/2"3/4"7/8"Steel1,6001,45017,0006.5Required16-20° to 250°1553N2233.005/8"7/8"1"Steel1,8001,80014,00012Required16-20° to 250°1553N2338.183/4"1"1"Steel2,0002,20012,00017Required16-20° to 250°1553N2442.561"1 5/16"1.063"Steel3,4503,9508,70035Required16-20° to 250°1553N2549.428mm14mm20mmSteel94068021,0003.2Required16-20° to 250°1553N1134.2410mm16mm20mmSteel1,05085019,0004.2Required16-20° to 250°1553N1235.1612mm18mm26mmSteel1,4001,30019,00010Required16-20° to 250°1553N1336.1216mm22mm26mmSteel1,4501,60014,00016Required16-20° to 250°1553N1438.4820mm26mm26mmSteel1,8002,10011,00024Required16-20° to 250°1553N1555.1025mm32mm30mmSteel2,5002,9008,70050Required16-20° to 250°1553N1669.6630mm37mm30mmSteel2,5503,3507,30070Required16-20° to 250°1553N1779.98
