Pitchlign Caged Roller Followers - With and Without Seals

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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
  1. All dimensions are in inches
  2. Normal operating loads shoud not exceed the bearing dynamic capacity.
  3. Roller followers used without inner rings require a shaft with minimum hardness of Rc 58 and surface finish of 16 rms or better
  4.  For roller followers without seals, speed limit may be increased by 30% with oil lubricaiton.