A
Anonymous
Apr 11, 2026
Rating: 5/5
Fast Delivery
Arrived well packaged with no damage. Genuine Wafangdian branding on the shields.
Description
Wafangdian Deep Groove Miniature Ball Bearings 684/628/4 685/618/5 685/628/5 618/6
Reviews
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
A
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.
A
Anonymous
Mar 03, 2026
Rating: 4/5
Good Value
Dimensions matched my caliper measurements perfectly. One bearing was slightly stiff initially but loosened up.
A
Anonymous
Feb 17, 2026
Rating: 4/5
Standard Spec
Matches dimensional drawings for the 685 series. Good grease fill amount.
A
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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