Attributes

Brand	-
Category	Industrial Small Parts / Bearings & Bushings
Origin	-
Brand	HRB Harbin
Bearing Type	Deep Groove Ball Bearing
Model Series	683, 684, 685, 686, 687, 688, 689
Seal Type	ZZ (Double Metal Shield)
Material	GCr15 Chrome Steel
Precision Grade	P0 (ABEC-1)
Cage Material	Steel
Lubrication	Pre-greased
Origin	China
Warranty	1 Year Manufacturer Warranty

5 reviews

Anonymous

Apr 18, 2026

Rating: 4/5

Good Value

Works well for general machinery repair. Slightly tight at first but loosened up.

Anonymous

Mar 16, 2026

Rating: 5/5

Perfect for RC Motors

Used the 688 size for my drone upgrade. Very smooth rotation and quiet operation.

Anonymous

Feb 27, 2026

Rating: 5/5

Authentic HRB Quality

Verified the branding on the shield. Genuine product from the official store.

Anonymous

Feb 17, 2026

Rating: 5/5

Fast Shipping

Arrived well packaged. No damage to seals during transit.

Anonymous

Feb 06, 2026

Rating: 5/5

Smooth Operation

Low friction observed during testing. Will buy again for future projects.

5 FAQ

Q: Is this suitable for high-speed applications?

A: Yes, these are designed for high-speed rotation, but please check specific RPM limits for each size.

Q: What are the dimensions for the 688 model?

A: The 688 ZZ bearing dimensions are 8mm inner diameter, 16mm outer diameter, and 5mm width.

Q: Are these rust resistant?

A: They are made of chrome steel. Please keep them in a dry environment to prevent rust.

Q: Can I add more lubrication later?

A: Since these are ZZ shielded, you can add oil, but greasing is more difficult without removing shields.

Q: Do you offer bulk discounts?

A: Yes, please contact our sales team directly for orders exceeding 50 units.

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