Ntn
NTN UC318 Insert Bearing 90x190x49mm electrician tool
Insert bearing with 90 mm bore, 190 mm outside diameter and 49 mm width for shaft support
- 90mm bore fits standard shafts
- 190mm outer diameter matches housing specs
- 49mm width supports load capacity
- NTN brand ensures manufacturing quality
- New condition guarantees full service life
NTN UC318 Insert Bearing
The NTN UC318 is a new insert bearing built for electrician tools and compatible power-tool assemblies. It suits maintenance teams and workshops that need a direct-fit replacement for worn units. The 90x190x49mm envelope matches the original mounting pattern without modification.
Replacing worn UC318 units
Swap this bearing when the original shows excess play, noise or heat under load. The jump is worth it when the tool spindle runs on a 90 mm shaft and the housing accepts a 190 mm outer diameter with a 49 mm width. It restores smooth rotation without changing the tool design.
Dimensional limits of the UC318
The bearing fits only shafts of 90 mm and housings bored to 190 mm with 49 mm of axial room. It cannot serve applications that need a larger bore, a smaller outer diameter or a different width. First listed by the manufacturer in 2026, it carries no integrated seals or locking collars beyond the standard UC318 geometry.
Highlights
- 90mm bore fits standard shafts
- 190mm outer diameter matches housing specs
- 49mm width supports load capacity
- NTN brand ensures manufacturing quality
- New condition guarantees full service life
Specifications
| Brand | NTN |
|---|---|
| Model | NTN UC318 |
Questions about this item
What shaft diameter fits the 90 mm bore of the NTN UC318 insert bearing?
The bearing accepts a 90 mm shaft diameter for a direct press fit.
Which set-screw orientation is correct when mounting the UC318 unit?
Align the set screws perpendicular to the load direction and torque them to the manufacturer specification.
How often should the NTN UC318 insert bearing be relubricated?
Relubricate through the grease nipple at intervals matched to speed, load and operating temperature.
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