Attributes

Brand	-
Category	Industrial Small Parts / Bearings & Bushings
Origin	-
Material	Chrome Steel GCr15
Seal Type	ZZ (Metal Shield) / 2RS (Rubber Seal)
Precision Grade	ABEC-1 / ABEC-3
Lubrication	Pre-greased
Cage Material	Steel
Noise Level	Z1 / Z2 Low Noise
Operating Temperature	-20°C to 120°C
Load Type	Radial Load
Origin	Imported
Common Applications	RC Motors, Drones, Appliances, Skateboards

5 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Perfect Motor Fit

Ordered the 637 motor bearings. They fit my 540 motor exactly. Runs quietly and stays cool under load. Will buy again.

Anonymous

Mar 10, 2026

Rating: 5/5

Bulk Buy Winner

Stocking up for my workshop. The 639Z model is hard to find locally, so this imported set is a lifesaver. Quality matches domestic brands.

Anonymous

Feb 08, 2026

Rating: 5/5

Great for RC Car Upgrade

These bearings spin very smoothly. I used the 636 high-speed model for my RC motor and noticed less friction immediately. Good value for the price.

Anonymous

Feb 04, 2026

Rating: 3/5

Mixed Bag

Most of the bearings in the pack were great, but one 638 ball bearing felt a bit gritty out of the box. The rest work fine.

Anonymous

Jan 27, 2026

Rating: 4/5

Good value, minor packaging issue

The bearings themselves are high quality and fit perfectly. One package was slightly crushed during shipping, but the parts were intact.

5 FAQ

Q: How long does shipping usually take?

A: Standard shipping typically takes 3 to 5 business days within the continental US. Expedited options are available at checkout.

Q: Are these pre-lubricated or do I need to add oil?

A: All bearings come pre-greased from the factory. You can use them immediately without additional lubrication.

Q: What is the difference between ZZ and 2RS seals?

A: ZZ refers to metal shields which offer less friction but less protection. 2RS refers to rubber seals which offer better protection against dust and water but slightly more friction.

Q: What is the maximum RPM for the 637 model?

A: The 637 motor bearing is designed for high-speed applications, typically handling up to 20,000 RPM depending on load and lubrication conditions.

Q: Will the 636 bearing fit a standard 540 brushed motor?

A: Yes, the 636 high-speed bearing is commonly compatible with standard 540 brushed motors. Please verify your specific motor shaft diameter before ordering.

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