Attributes

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

5 reviews

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.

5 FAQ

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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