NA-22-8-2RS 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-22-8-2RS model number is decoded

the 24 mm outside diameter runs on the track while the 8 mm bore takes the pin or shaft; the 12 mm overall width spreads the Hertzian contact over the outer ring published ratings C 4.68 kN and C0 4.55 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 1.03 is typical for sealed support roller without flange rings, with inner ring executions fatigue load limit Pu 0.54 kN at 8 mm bore gives a specific load of 0.58 kN per mm; the limiting speed is 6,700 r/min the 12 mm width carries the load at 0.39 kN per mm of roller complement; section height 8.0 mm between bore and track surface determines the outer-ring bending stiffness mass 34 g over a 24x12 mm envelope works out to 0.118 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty with a 8 mm bore this is one of the smallest sizes listed; the reduced section height limits the outer-ring bending stiffness, so track alignment must be held closely 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 agricultural equipment cam followers, packaging machine timing cams and glass processing line conveyors this size is commonly specified for agricultural equipment cam followers and packaging machine timing cams, where the 24 mm track diameter and 8 mm bore fit standard cam and rail geometries in glass processing line conveyors the 24 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 34 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 contact seals add a small running torque; in low-power cam drives the drag can be significant
• the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed
• the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating