FafnirMUOB7/8Ball Bearing Insert – 7/8 in Bore, Spherical OD, Eccentric Locking Collar, Shielded, Snap Ring

Product Description

What this part is

Fafnir MUOB 7/8, a ball bearing insert with a spherical outside diameter. Bore Diameter: 0.8750 in (7/8 in). Rolling Elements: Ball. Number Of Rows: 1. Bore Type: Straight. Locking Method: Eccentric locking collar. Closure Type: Shielded. Snap Ring Included: Outer ring snap ring supplied. Bearing Material: Chrome steel.

Decoding the designation

MU — Fafnir wide inner ring ball bearing insert with a spherical outer ring, sized on the shaft rather than on a metric bore code.

O — the outer ring carries a snap ring groove, and the ring is supplied with the insert.

B — shielded execution.

7/8 — the shaft size in inches, which is how this range is numbered.

What these specs mean in practice

The spherical outside diameter seats in a matching housing socket and lets the insert swivel, so the bearing takes up shaft misalignment on a bolted-in-place pillow block or flange without edge-loading the raceways. The eccentric locking collar grips the shaft by cam action when it is turned against the extended inner ring and set with its grub screw, which holds the insert on a plain drawn shaft with no shoulder, threaded nut or keyway. The snap ring in the outer ring groove locates the insert axially in a through-bored cartridge housing.

Quantity and configuration

Unit Quantity: 1 Pc. One complete insert with its collar, shield and snap ring, as recorded on the condition note.

Interchange guidance

Bearing inserts are numbered to each maker’s own housing and collar system and the shaft-size numbering does not map cleanly onto the metric UC insert range, so no like-for-like interchange is published for this part. Match a replacement on shaft size, outside diameter, outer ring width, locking method and snap ring groove. Searchable variants include MUOB7/8, MUOB 7/8, MUOB-7/8, MU0B 7/8 and MUOB78.