Pitchlign Caged Roller Followers - With and Without Seals

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Series SRF without seals

Part Number: SRF 55
Without Seals

D. Max: 2.750
Inside Diameter Nominal: 1 1/2
Corner Radius: 0.08
Approx Weight [lbs]: 1.340
Matching Inner Rings: IR 7275, IR 7275 C
Critical Angle [deg] 2: 32.3
Speed Limit [rpm] 3: 3600
Roller D Min: 2.749
Roller B Min +.000/-.005: 1.245
Inside Dia. Min: 1.5010
Inside Dia. Max: 1.5019
Bearing Dynamic Capacity C [lbf]: 11500
Bearing Static Capacity Co [lbf] 1: 22800
Track Capacity at 40 Rc [lbf]: 9250
Max: 1.5000
Min: 1.4995

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.