Pitchlign Caged Roller Followers - With and Without Seals

Series SRF without seals

Part Number	Roller D Max	Roller D Min	Roller B	Inside Diameter Nominal	Bearing Dynamic Capacity C [lbf]	Speed Limit [rpm]	Matching Inner Rings
SRF 20	1.000	0.999	0.495	1/2	1900	10900	�
SRF 25	1.250	1.249	0.620	5/8	2700	8700	�
SRF 30	1.500	1.499	0.745	3/4	4400	7200	IR 7153, IR 7153 C
SRF 35	1.750	1.749	0.745	7/8	4700	6200	IR 7173, IR 7173 C
SRF 40	2.000	1.999	0.995	1	6900	5400	IR 7194, IR 7194 C
SRF 45	2.250	2.249	0.995	1 1/4	7800	4300	IR 7234
SRF 50	2.500	2.499	0.995	1 3/8	8300	3900	IR 7254, IR 7254 D
SRF 55	2.750	2.749	1.245	1 1/2	11500	3600	IR 7275, IR 7275 C
SRF 60	3.000	2.999	1.245	1 5/8	9400	3300	IR 7295, IR 7295 C
SRF 65	3.250	3.249	1.245	1 3/4	12500	3000	IR 7315, IR 7315 C
SRF 70	3.500	3.499	1.245	1 7/8	10100	2800	IR 7335
SRF 75	3.750	3.749	1.245	2	10600	2700	IR 7355, IR 7355 D
SRF 80	4.000	3.999	1.245	2 1/4	12700	2300	IR 8405, IR 8405 D

Normal operating loads shoud not exceed the bearing dynamic capacity.

Roller followers used without inner rings require a shaft with minimum hardness of Rc 58 and surface finish of 16 rms or better

For roller followers without seals, speed limit may be increased by 30% with oil lubricaiton.