NA-2207-2RS 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 NA-2207-2RS model number is decoded

the 72 mm outside diameter runs on the track while the 35 mm bore takes the pin or shaft; the 23 mm overall width spreads the Hertzian contact over the outer ring published ratings C 22.4 kN and C0 35.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.63 is typical for sealed support roller without flange rings, with inner ring executions fatigue load limit Pu 4.3 kN at 35 mm bore gives a specific load of 0.64 kN per mm; the limiting speed is 2,200 r/min the 23 mm width carries the load at 0.97 kN per mm of roller complement; section height 18.5 mm between bore and track surface determines the outer-ring bending stiffness mass 510 g over a 72x23 mm envelope works out to 0.308 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 35 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads the NA 22 series with 2RS suffix denotes a compact sealed support roller for applications where relubrication access is impossible and the track environment carries dust or moisture typical applications include conveyor transfer and diverting rollers, woodworking machinery feed rollers and cam mechanisms and indexing drives this size is commonly specified for conveyor transfer and diverting rollers and woodworking machinery feed rollers, where the 72 mm track diameter and 35 mm bore fit standard cam and rail geometries in cam mechanisms and indexing drives the 72 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 510 g mass is low enough for rapid indexing cycles the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill
• the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed
• sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open