RPNA 25/42

Spherical needle roller bearings without inner ring

Spherical needle roller bearings offer compact solutions in applications where space is at a premium. Due to the large number of rollers, they have a high load carrying capacity. In their internal design, the use of a convex outer ring accommodates two concave seating rings in the tensile sleeve, enabling the bearings to withstand initial static misalignment. If the shaft cannot be hardened and ground, bearings without inner rings are the best choice for compact bearing arrangements.

  • High radial load carrying capacity
  • Can withstand static initial misalignment
  • Small cross-section
  • Suitable for compact bearing arrangements

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Overview
Technical Parameters

Overview

Skim Through

Size

Needle roller full bore diameter25.0mm
Outer diameter42.0mm
Width20.0mm

Performance

Basic rated dynamic load19.0kN
Basic rated static load32.5kN
Reference speed16000.0r/min
Limiting speed18000.0r/min

Properties

Bearing parts Bearing without inner ring
Number of columns 1
Type of outer ring Pressed outer ring with open ends
Alignment function with
Cage Steel plate
Number of flanges, outer ring 2
Tolerance class Normal
Material, bearing Bearing steel
Coated without
Sealing without
Seal type Not Applicable
Lubricant None
Relubrication function Without

Logistics

Net weight0.109kg
eClass Code 23-05-09-03
UNSPSC Code 31171512

Technical Parameters

Technical Parameters

Size

Fw min.25.0mm Roller inner diameter
D42.0mm Outer diameter
C20.0mm Width
D136.5mm Spacer Shoulder I.D.
r0.8mm Chamfering dimensions of steel plate retaining sleeve

Shoulder size

Da min.35.0mm Minimum permissible bearing housing shoulder
Da max.37.0mm Bearing housing shoulder diameter
ra max.0.8mm Chamfering radius

Data calculation

Basic dynamic load rating C19.0kN
Basic rated static loadC032.5kN
Fatigue Load LimitPu4.0kN
Reference speed16000.0r/min
Limit speed18000.0r/min

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