Attributes

Brand	-
Category	Industrial Small Parts / Bearings & Bushings
Origin	-
Brand Name	BJK
Country of Origin	Japan
Material	Chrome Steel GCr15
Seal Type	ZZ (Metal) / 2RS (Rubber)
Precision Rating	ABEC-7
Inner Diameter Range	2mm - 9mm
Outer Diameter Range	5mm - 19mm
Width Range	2.5mm - 5mm
Cage Material	Steel
Lubrication	Pre-lubricated with Light Oil

5 reviews

Anonymous

Mar 18, 2026

Rating: 5/5

Quiet bearings

Replaced noisy fans in my RC car with these. The noise reduction is significant. They spin freely and handle high RPMs without heating up.

Anonymous

Mar 18, 2026

Rating: 4/5

Good value

Quality is good and they seem genuine. Packaging was a bit basic but the bearings themselves are well protected in individual sleeves. Would buy again.

Anonymous

Mar 13, 2026

Rating: 5/5

Smooth operation for drones

Used these F688Z bearings for my drone motor upgrades. The rotation is incredibly smooth and there is virtually no lateral play. Definitely noticed a difference in flight stability.

Anonymous

Jan 30, 2026

Rating: 5/5

Genuine Japan import feel

You can tell the difference in machining quality. The flanges are straight and the tolerances are tight. Fast shipping too.

Anonymous

Jan 24, 2026

Rating: 5/5

Great fit for 3D printer

F685Z matched perfectly on my extruder fan shaft. Quality feels superior to the generic Chinese bearings I used before. Highly recommend for precision tasks.

5 FAQ

Q: What is the maximum RPM rating for the F689Z?

A: While specific RPM depends on load and lubrication, these ABEC-7 bearings are suitable for high-speed applications typical in RC and drones.

Q: Which size bearing fits the Tamiya Mini 4WD gearbox?

A: It depends on the specific model and modification, but F683 and F685 are commonly used in Mini 4WD builds. Please check your manual.

Q: Are these bearings made of stainless steel?

A: No, these are made of high-carbon Chrome Steel GCr15 for durability and load capacity. They are not stainless steel.

Q: Do you sell single pieces or only in lots?

A: These are sold in lots of 10 pieces per size to ensure you have spares. We do not currently offer single unit sales.

Q: Can I return them if the size is wrong?

A: Yes, we accept returns within 30 days provided the package is unopened and the bearings are unused.

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