Attributes

Brand	-
Category	Industrial Small Parts / Bearings & Bushings
Origin	-
Material	Stainless Steel 440C
Inner Diameter	8 mm
Outer Diameter	22.5 mm
Width	14.5 mm
Shaft Compatibility	12 mm Round Rail
Profile Shape	U-Shaped Arc
Precision Grade	ABEC-7
Dynamic Load Capacity	1.2 kN
Package Quantity	2 Pieces
Surface Finish	Mirror Polished

5 reviews

Anonymous

Apr 11, 2026

Rating: 4/5

Good Value

Solid build quality for the price. Shipping took a bit longer than expected but the product is fine.

Anonymous

Apr 10, 2026

Rating: 3/5

Okay Product

Works as intended but requires frequent lubrication in my specific application.

Anonymous

Mar 04, 2026

Rating: 5/5

Smooth Motion

Very quiet operation under load. I use these for a CNC axis and they perform reliably.

Anonymous

Mar 02, 2026

Rating: 5/5

Great Fit

Works perfectly on my linear rail setup. The dimensions were exact and installation was straightforward.

Anonymous

Feb 12, 2026

Rating: 5/5

Exact Specs

Dimensions matched the description exactly. No issues with fitting on the 12mm shaft.

5 FAQ

Q: Can I use these for vertical motion?

A: Yes, provided the load does not exceed the dynamic load capacity listed.

Q: Are replacements available?

A: Yes, please search for model U22 in our store for compatible replacements.

Q: Is this compatible with 10mm rails?

A: No, this model is specifically designed for 12mm shafts.

Q: What is the hardness rating?

A: The stainless steel is heat-treated to approximately HRC 58-60.

Q: Do I need to grease these before use?

A: They come pre-lubricated from the factory, but regular maintenance is recommended.

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