SEALMASTER RB-12 insert bearing

SEALMASTER RB-12 belongs to insert bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for RB-12 and any equivalents.

The SEALMASTER RB series is a single row ball bearing with an extended inner ring, made to sit inside split plummer block housings as well as wall and pillow block units. It fits equipment where the shaft turns while the housing stays put, and it can be aligned and locked onto the shaft without any machining of the seat. This makes it a common choice in industrial plants, workshops and agricultural machinery.

Reading the code: the letters RB come first, followed by a number that identifies the insert size, as in RB-8, RB-10, RB-12, RB-14, RB-15, RB-16, RB-18 and RB-19. That number is a size identifier rather than a diameter or a direct measurement, so it has to be checked against the manufacturer's table to find the matching shaft. For a replacement, the complete code is the safest thing to send, and the shaft measurement helps confirm it.

Typical applications include conveyors, elevators, mixers, pumps, fans and process lines. They also turn up on agricultural equipment and on older machines where the original housing is no longer available and a compatible option is needed. Maintenance teams often replace just the insert when the housing is still serviceable.

Selection comes down to three things: shaft diameter, locking method (set screw, eccentric or adapter) and the sealing the environment calls for. Dusty, wet or frequently washed areas point to a more closed seal, while a standard seal is enough in clean conditions. During mounting, check the shaft for burrs, lubricate the seat and tighten the locking device without hammering the insert. Good alignment and regular lubrication go a long way toward bearing life.

On equivalents: the SEALMASTER RB series can be matched to inserts from other makers that share the same shaft diameter and locking type, but no universal table exists because each manufacturer uses its own nomenclature. Compare shaft dimensions, inner ring width and locking system instead. If the exact code is hard to pin down, MR Industrial Accessories can point you to a compatible alternative.

To request a quote on an RB insert, send the full code (RB-8, RB-12, etc.) or the shaft measurement plus the housing type via WhatsApp or email. MR Industrial Accessories LLC supplies SEALMASTER along with bearings, housings and power transmission components, and our team replies promptly.