PWTR-3072-2RS 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-3072-2RS model number is decoded

the 72 mm outside diameter runs on the track while the 30 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 39.6 kN and C0 45 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.88 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 5.6 kN at 30 mm bore gives a specific load of 1.32 kN per mm; the limiting speed is 2,000 r/min the 29 mm width carries the load at 1.37 kN per mm of roller complement; section height 21.0 mm between bore and track surface determines the outer-ring bending stiffness mass 700 g over a 72x29 mm envelope works out to 0.335 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 30 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads reading PWTR..2RS: sealed twin-row cylindrical roller support roller; the integral flanges and contact seals protect the 72 mm track roller from wash-down and dust typical applications include automotive welding jig positioners, conveyor transfer and diverting rollers and woodworking machinery feed rollers this size is commonly specified for automotive welding jig positioners and conveyor transfer and diverting rollers, where the 72 mm track diameter and 30 mm bore fit standard cam and rail geometries in woodworking machinery feed rollers the 72 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 700 g mass is low enough for rapid indexing cycles 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

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• 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
• the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life
• the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism