Pitchlign Caged Roller Followers - With and Without Seals

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Series SRF without seals



Part Number: SRF 50
Without Seals

D. Max: 2.500
Inside Diameter Nominal: 1 3/8
Corner Radius: 0.08
Approx Weight [lbs]: 0.860
Matching Inner Rings: IR 7254, IR 7254 D
Critical Angle [deg] 2: 32.3
Speed Limit [rpm] 3: 3900
Roller D Min: 2.499
Roller B Min +.000/-.005: 0.995
Inside Dia. Min: 1.3760
Inside Dia. Max: 1.3769
Bearing Dynamic Capacity C [lbf]: 8300
Bearing Static Capacity Co [lbf] 1: 15700
Track Capacity at 40 Rc [lbf]: 6450
Max: 1.3750
Min: 1.3745

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.