Description
Reviews
| Brand | - |
| Category | Industrial Small Parts / Bearings & Bushings |
| Origin | - |
| Brand | NSK |
| Material | High Carbon Chrome Steel |
| Country of Origin | Japan |
| Bearing Type | Deep Groove Ball Bearing |
| Seal Options | ZZ (Metal), VV (Rubber) |
| Internal Clearance | C3 or Standard (CN) |
| Precision Class | ISO Class 0 (ABEC-1) |
| Cage Material | Pressed Steel |
| Lubrication | Pre-lubricated with Grease |
| Recommended Application | Motors, Robotics, Precision Machinery |
Anonymous
Apr 06, 2026
Rating: 5/5
Genuine NSK Quality
Verified the markings on the bearing. Smooth rotation and minimal noise. Perfect for my servo motor project.
Anonymous
Mar 23, 2026
Rating: 5/5
Perfect fit for 3D printer
Replaced worn bearings in my extruder. The C3 clearance handles thermal expansion well. Highly recommend.
Anonymous
Mar 11, 2026
Rating: 5/5
Smooth operation
Bought the 688ZZ variety. They spin very freely with no grit. Packaging was secure against dust.
Anonymous
Feb 16, 2026
Rating: 5/5
Reliable supply
Ordered multiple sizes (685, 686). All arrived labeled correctly. Noise levels are significantly lower than previous suppliers.
Anonymous
Feb 06, 2026
Rating: 4/5
Good but pricey
Quality is undeniable compared to generic brands. Shipping took a bit longer than expected but worth the wait for genuine parts.
Q: What is the difference between ZZ and VV seals?
A: ZZ uses metal shields for high speed, VV uses non-contact rubber seals for better dust protection.
Q: How can I verify these are genuine NSK?
A: Genuine NSK bearings have laser-etched markings and come in branded packaging with authenticity codes.
Q: Is grease pre-applied?
A: Yes, all bearings come pre-lubricated with high-quality grease suitable for general use.
Q: What are the dimensions for the 688 model?
A: The 688 bearing typically has an 8mm bore, 16mm outer diameter, and 5mm width.
Q: Are these suitable for high RPM applications?
A: Yes, especially the ZZ variant which has less friction than rubber seals.
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