Attributes

Brand	-
Category	Industrial Small Parts / Bearings & Bushings
Origin	-
Brand	OKO
Country of Origin	Sweden
Material	High-Carbon Chrome Steel
Precision Class	P4 / P5
Seal Type	ZZ (Metal Shield)
Cage Material	Steel Ribbon
Lubrication	High-Speed Synthetic Grease
MR52 Dimensions	5mm x 2mm x 2.5mm
MR63ZZ Dimensions	6mm x 3mm x 2.5mm
Recommended Application	RC Models, Drones, CNC Spindles

5 reviews

Anonymous

Mar 03, 2026

Rating: 5/5

High speed capability

Running at high RPMs with no heat buildup. Excellent lubrication from the factory. Very satisfied.

Anonymous

Feb 26, 2026

Rating: 5/5

Exact fit for MR63ZZ

Dimensions were spot on. No need for shims or adjustments. Very happy with the precision grade.

Anonymous

Feb 17, 2026

Rating: 4/5

Great performance, slight delay

Bearings work flawlessly in my RC car. Shipping took a bit longer than expected but product is excellent.

Anonymous

Feb 11, 2026

Rating: 5/5

Perfect for my drone build

These bearings are incredibly smooth. Noticed less vibration immediately after installation. High quality.

Anonymous

Jan 24, 2026

Rating: 5/5

Genuine Swedish quality

You can feel the difference in precision compared to generic brands. Worth the extra cost for serious models.

5 FAQ

Q: Are these suitable for high RPM motors?

A: Yes, designed for high-speed applications up to 20,000 RPM depending on load and setup.

Q: Are these stainless steel?

A: No, these are Chrome Steel for maximum hardness and durability under high load conditions.

Q: What is the difference between P4 and P5 here?

A: P4 offers tighter tolerance than P5. We ship based on stock availability within these precision grades.

Q: Do I need to clean the grease before use?

A: No, the factory grease is optimized for performance. Cleaning may void warranty and reduce lifespan.

Q: Can I use these in wet conditions?

A: The ZZ shield offers some protection, but they are not fully waterproof. Avoid direct water exposure.

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