PWTR-4090-2RS bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers) · extracted 2026-09-30

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.

Cross references & equivalents

Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.

How the PWTR-4090-2RS model number is decoded

the 90 mm outside diameter runs on the track while the 40 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 49.5 kN and C0 62 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.80 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 7.65 kN at 40 mm bore gives a specific load of 1.24 kN per mm; the limiting speed is 1,800 r/min the 32 mm width carries the load at 1.55 kN per mm of roller complement; section height 25.0 mm between bore and track surface determines the outer-ring bending stiffness mass 1150 g over a 90x32 mm envelope works out to 0.399 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 40 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads PWTR denotes the sealed double-row full-complement cylindrical roller support roller: integral flanges and 2RS contact seals make it a greased-for-life unit for dirty or inaccessible positions typical applications include printing press roller followers, automotive welding jig positioners and conveyor transfer and diverting rollers this size is commonly specified for printing press roller followers and automotive welding jig positioners, where the 90 mm track diameter and 40 mm bore fit standard cam and rail geometries in conveyor transfer and diverting rollers the 90 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 1150 g mass is low enough for rapid indexing cycles the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life
• the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion
• sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate