Description
Reviews
| Brand | - |
| Category | Industrial Small Parts / Bearings & Bushings |
| Origin | - |
| Brand | Ruinyuan |
| Model Number | FL760203 / DH7203B |
| Bore Diameter | 17 mm |
| Outer Diameter | 40 mm |
| Width | 12 mm |
| Seal Type | 2RS (Double Rubber Seal) |
| Precision Grade | P4 |
| Material | GCr15 Chrome Steel |
| Cage Material | Steel |
| Mounting Type | Flanged |
Anonymous
Apr 01, 2026
Rating: 5/5
Perfect for CNC Upgrade
These bearings fit perfectly on my lead screw setup. The P4 precision grade really reduced the vibration in my machine. Highly recommend for hobbyist CNC builds.
Anonymous
Mar 31, 2026
Rating: 5/5
High Precision as Advertised
Noticed less noise immediately after installation. The flanged design makes mounting much easier compared to standard bearings. Will buy again.
Anonymous
Mar 10, 2026
Rating: 4/5
Good Quality, Tight Fit
Quality seems genuine for Ruinyuan brand. The fit was slightly tight on the shaft initially but smoothed out after running. Good value for the price.
Anonymous
Feb 23, 2026
Rating: 4/5
Great for Machine Tools
Using these on a lathe modification. They handle the speed well. Only giving 4 stars because the packaging could be a bit more robust for international shipping.
Anonymous
Feb 10, 2026
Rating: 5/5
Genuine Product
Packaging was secure and the bearings came well-oiled. Checked the markings and they match the official Ruinyuan specifications. Fast shipping too.
Q: What does the P4 precision grade mean?
A: P4 indicates a high precision class suitable for machine tools, offering tighter tolerances than standard P0 or P6 grades.
Q: Are these bearings pre-lubricated?
A: Yes, they come pre-lubricated with standard grease suitable for general machine tool applications.
Q: What is the maximum RPM these bearings can handle?
A: For standard grease lubrication, these P4 grade bearings can typically handle up to 10,000 RPM depending on load and mounting conditions.
Q: Can these be used for high temperature applications?
A: Standard grease is rated up to 120 degrees Celsius. For higher temperatures, special lubrication or material variants may be required.
Q: Will this fit a 17mm lead screw shaft exactly?
A: Yes, the bore diameter is precisely 17 mm, designed to fit standard 17mm shafts with appropriate tolerance.
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