Description
Reviews
| 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 |
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.
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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