FafnirMUB3/4Insert Ball Bearing Unit – 3/4 in Shaft, Spherical Outer Surface, Locking Collar, Snap Ring and Shield

Product Description

What this part is

Fafnir MUB3/4 insert ball bearing unit. Bore Diameter: 3/4 in (0.7500 in). Bore Type: Straight. Rolling Elements: Ball. Number Of Rows: 1. Bearing Material: Chrome steel. Design Units: Imperial. The outer surface is spherical, so the insert self-aligns inside its housing seat.

Decoding the designation

MU — the Fafnir replacement insert unit family for SA, SAD and SADD series pillow blocks.

B — the inch bore size code, 3/4 in.

What these specs mean in practice

Bore Diameter: 3/4 in. The insert clamps onto a plain 3/4 in shaft, so no shaft machining is needed.

Locking Method: Locking collar. The collar grips the shaft and carries the drive torque, which is what allows a commercial shaft tolerance to be used.

Closure Type: Shielded, with a snap ring on the outer ring. The shield keeps swarf and coarse contamination out of the ball track; the snap ring locates the insert axially in its housing.

Housing Style: Spherical outer surface. The spherical seat lets the insert take several degrees of static shaft misalignment during mounting.

Quantity and configuration

Unit Quantity: 1 Pc. Insert unit with its locking collar, snap ring and shield. This is the rebuild part for an existing SA, SAD or SADD pillow block.

Interchange guidance

No cross-references are published for this number. The MU insert is a Fafnir housing-specific replacement rather than an ISO-numbered bearing, so an interchange has to be matched on the insert outside diameter and the housing series. Search on the MUB 3/4, MUB-3/4 and MU B 3/4 forms of the number.