Attributes

Brand	-
Category	Industrial Small Parts / Bearings & Bushings
Origin	-
Brand Name	Wafangdian
Bearing Type	Deep Groove Ball Bearing
Material	Chrome Steel GCr15
Model Series	684, 685, 618, 628
Seal Configuration	ZZ (Metal) or 2RS (Rubber)
Precision Class	P0 / ABEC-1
Lubrication	Pre-greased for Life
Cage Material	Steel
Primary Application	Robotics, Drones, Machinery
Package Quantity	10 Pieces per Pack

5 reviews

Anonymous

Apr 11, 2026

Rating: 5/5

Fast Delivery

Arrived well packaged with no damage. Genuine Wafangdian branding on the shields.

Anonymous

Mar 04, 2026

Rating: 5/5

Perfect for Arms

Used in robotic joint assembly. The load capacity is sufficient for my lightweight arm design.

Anonymous

Mar 03, 2026

Rating: 4/5

Good Value

Dimensions matched my caliper measurements perfectly. One bearing was slightly stiff initially but loosened up.

Anonymous

Feb 17, 2026

Rating: 4/5

Standard Spec

Matches dimensional drawings for the 685 series. Good grease fill amount.

Anonymous

Feb 17, 2026

Rating: 5/5

Excellent Quality

Smooth spin right out of the box. Used them for a 3D printer upgrade and the noise level dropped significantly.

5 FAQ

Q: What is the inner diameter of model 684?

A: The 684 model has a 4mm Inner Diameter, 9mm Outer Diameter, and 4mm Width.

Q: Do you offer bulk discounts for larger orders?

A: Yes, please contact our sales department directly for quotes on orders over 100 packs.

Q: Are these bearings corrosion resistant?

A: They are made of Chrome Steel. For wet environments, we recommend applying additional protective coating.

Q: What type of grease is pre-filled in these bearings?

A: Standard lithium based grease suitable for general purpose mechanical applications.

Q: Can I use these in submerged water applications?

A: Not recommended for continuous submersion unless using stainless steel variants with 2RS seals.

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