PWTR-40-2RS 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-40-2RS model number is decoded

the 80 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 41.8 kN and C0 49 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.85 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 6 kN at 40 mm bore gives a specific load of 1.04 kN per mm; the limiting speed is 1,800 r/min the 32 mm width carries the load at 1.31 kN per mm of roller complement; section height 20.0 mm between bore and track surface determines the outer-ring bending stiffness mass 820 g over a 80x32 mm envelope works out to 0.320 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty with a 40 mm bore this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity reading PWTR..2RS: sealed twin-row cylindrical roller support roller; the integral flanges and contact seals protect the 80 mm track roller from wash-down and dust typical applications include linear guide and track systems, robotic arm track guidance and paper mill web guide rollers this size is commonly specified for linear guide and track systems and robotic arm track guidance, where the 80 mm track diameter and 40 mm bore fit standard cam and rail geometries in paper mill web guide rollers the 80 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 820 g mass is low enough for rapid indexing cycles sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring
• sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate
• the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life