Attributes

Brand	-
Category	Industrial Small Parts / Connectors and Fasteners
Origin	-
Material	304 Stainless Steel
Surface Finish	Polished
Outer Diameter	50 mm
Overall Length	80 mm
Input Bore Diameter	10 mm
Output Bore Diameter	8 mm
Fixation Type	Dual Set Screws
Item Weight	245 grams
Hardness Rating	HRC 28-32
Package Includes	1 x Coupling Adapter

5 reviews

Anonymous

Mar 20, 2026

Rating: 4/5

Good but Set Screws Tight

The coupling itself is excellent quality. Only minor issue was the set screws were a bit tight to thread initially, but once loosened they work fine.

Anonymous

Mar 14, 2026

Rating: 5/5

Solid Build Quality

Heavy duty stainless steel that feels like it will last. The set screws hold tight under load. Great value for the price compared to local suppliers.

Anonymous

Mar 10, 2026

Rating: 5/5

Precise Fit for CNC Project

This coupling fit perfectly between my stepper motor and lead screw. The step-down from 10mm to 8mm was exact with no wobble. Very satisfied with the rigidity.

Anonymous

Feb 26, 2026

Rating: 5/5

Great Value

Works great for my motor mount adapter setup. The polished finish looks professional and resists corrosion in my workshop environment.

Anonymous

Feb 21, 2026

Rating: 5/5

Exactly What I Needed

Hard to find this specific bore combination locally. Shipping was fast and the part matches the description perfectly. No runout issues.

5 FAQ

Q: Are the set screws included pre-installed?

A: Yes, the dual set screws are pre-installed on the coupling for immediate use.

Q: What is the runout tolerance on the bores?

A: The runout tolerance is less than 0.05mm, ensuring precision alignment for motor shafts.

Q: Can I return this if the bore size is wrong?

A: Yes, unused items can be returned within 30 days of delivery for a full refund.

Q: What is the maximum RPM rating for this coupling?

A: This rigid coupling is rated for speeds up to 4000 RPM depending on shaft balance.

Q: Is this suitable for outdoor use without rusting?

A: Made from 304 Stainless Steel, it offers excellent corrosion resistance for most outdoor applications.

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