NA-2206-2RS 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-2206-2RS model number is decoded

the 62 mm outside diameter runs on the track while the 30 mm bore takes the pin or shaft; the 20 mm overall width spreads the Hertzian contact over the outer ring published ratings C 17.9 kN and C0 25.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.70 is typical for sealed support roller without flange rings, with inner ring executions fatigue load limit Pu 3.05 kN at 30 mm bore gives a specific load of 0.60 kN per mm; the limiting speed is 2,800 r/min the 20 mm width carries the load at 0.89 kN per mm of roller complement; section height 16.0 mm between bore and track surface determines the outer-ring bending stiffness mass 320 g over a 62x20 mm envelope works out to 0.258 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 NA 22..2RS: sealed yoke-type track roller with inner ring — the 2RS suffix means integral contact seals, making it the maintenance-free counterpart of the open STO typical applications include textile machine cam drives, agricultural equipment cam followers and packaging machine timing cams this size is commonly specified for textile machine cam drives and agricultural equipment cam followers, where the 62 mm track diameter and 30 mm bore fit standard cam and rail geometries in packaging machine timing cams the 62 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 320 g mass is low enough for rapid indexing cycles the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating
• the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill
• NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals