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Home / Bearings & Bushings / HRB Official Flagship Store Harbin Miniature Bearings 684 685 686 687 688 689 2Z 2RZ
Bearings & Bushings

Attributes

Brand -
Category Industrial Small Parts / Bearings & Bushings
Origin -
Brand HRB
Material Chrome Steel GCr15
Seal Type 2Z (Metal) / 2RZ (Rubber)
Precision Class P0 (ABEC-1)
Cage Material Steel
Lubrication Pre-lubricated with Grease
Inner Diameter 4mm - 9mm (Model Dependent)
Outer Diameter 9mm - 19mm (Model Dependent)
Width 4mm - 5mm (Model Dependent)
Country of Origin China

5 reviews

A

Anonymous

Apr 11, 2026

Rating: 4/5

Good value bulk pack

Great price for the quantity. One bearing felt slightly stiff but the rest were perfect.

A

Anonymous

Apr 02, 2026

Rating: 5/5

Fast shipping and well packed

Arrived quickly and each bearing was individually wrapped to prevent rust.

A

Anonymous

Mar 25, 2026

Rating: 5/5

Smooth motor operation

Replaced worn bearings in my drone motors. Noise level decreased significantly.

A

Anonymous

Mar 15, 2026

Rating: 5/5

Excellent for RC Cars

Used the 688zz bearings for my RC car wheels. They spin freely and handle the dirt well.

A

Anonymous

Feb 13, 2026

Rating: 5/5

Genuine HRB Quality

Verified genuine products. Dimensions are accurate and tolerances are good for the price point.

5 FAQ

Q: What is the bore size of the 686 model?

A: The 686 model has an inner diameter of 6mm, outer diameter of 13mm, and width of 5mm.

Q: What is the maximum operating temperature?

A: Standard grease allows operation up to 120 degrees Celsius. High temp grease options may vary.

Q: Are these bearings corrosion resistant?

A: They are made of chrome steel. For high moisture environments, we recommend the 2RZ rubber sealed version.

Q: Can I use these for skateboard wheels?

A: These are miniature bearings. Standard skateboards typically use 608 series bearings, so these would be too small.

Q: Do you offer wholesale pricing?

A: Yes, please contact our customer service team for bulk order discounts on large quantities.

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