Attributes

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

5 reviews

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.

5 FAQ

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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