Pitchlign Caged Roller Followers - With and Without Seals

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Series SRF without seals



Part Number: SRF 70
Without Seals

D. Max: 3.500
Inside Diameter Nominal: 1 7/8
Corner Radius: 0.10
Approx Weight [lbs]: 2.230
Matching Inner Rings: IR 7335
Critical Angle [deg] 2: 26.8
Speed Limit [rpm] 3: 2800
Roller D Min: 3.499
Roller B Min +.000/-.005: 1.245
Inside Dia. Min: 1.8760
Inside Dia. Max: 1.8770
Bearing Dynamic Capacity C [lbf]: 10100
Bearing Static Capacity Co [lbf] 1: 23800
Track Capacity at 40 Rc [lbf]: 11300
Max: 1.8750
Min: 1.8745

All dimensions are in inches

Normal operating loads should 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

Standard configuration of roller follower series SRF-- SS is with seal lips facing outward. To specify roller followers with seal lips facing inward, replace suffix -SS with suffix -RR. (example: SRF 30 RR)

  1. Bearing Static Capacity provided for comparison only
  2. For oscillatory application with angle of oscillation less than critical angle, consult RBC engineering department for revised fatigue calculation
  3. Speed limit of sealed roller followers is determined by maximum seal surface speed.
    For roller followers without seals, speed limit may be increased by 30% with oil lubrication.