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Home / Couplings / Aluminum Alloy Star Coupling - Elastic Star Jaw Coupler for Servo Motors, Ball Screws, and CNC Lathes

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Couplings
Origin -
Material High-Grade Aluminum Alloy
Coupling Type Elastic Star Jaw
Application Servo Motors, Ball Screws, CNC Lathes
Torque Capacity High Torsional Rigidity
Misalignment Compensation Angular, Parallel, and Axial
Spider Element Replaceable Polyurethane Elastomer
Surface Finish Anodized for Corrosion Resistance
Operating Temperature -30°C to +80°C
Maintenance Maintenance-Free Operation
Compatibility Standard NEMA and Metric Shafts

6 reviews

A

Anonymous

Mar 31, 2026

Rating: 4/5

Good quality, fast shipping

The aluminum finish is excellent and matches our other components. Took off one star because the installation instructions were a bit sparse, but standard practice applies.

A

Anonymous

Mar 19, 2026

Rating: 5/5

Exceeded expectations

Very precise machining on the bore. No runout issues detected after installation. It has been running smoothly for three months now.

A

Anonymous

Mar 03, 2026

Rating: 5/5

Great value for industrial grade

Compared to branded equivalents, this offers the same performance at a fraction of the cost. The elastic element absorbs shocks effectively.

A

Anonymous

Mar 03, 2026

Rating: 4/5

Solid component

Works exactly as described. The star jaw design makes it easy to swap out the elastomer if needed in the future. Highly recommend for hobbyist CNC builds.

A

Anonymous

Mar 03, 2026

Rating: 5/5

Reliable for high-speed servo applications

We use these in our production line for servo motor connections. They handle the speed well without overheating or losing torque transmission.

A

Anonymous

Mar 03, 2026

Rating: 5/5

Perfect fit for my CNC retrofit

Installed this on a ball screw drive for a lathe retrofit. The alignment tolerance was forgiving, and the vibration damping is noticeable. Very solid construction.

5 FAQ

Q: What is the maximum misalignment angle this can handle?

A: This coupling can typically compensate for angular misalignment up to 1.5 degrees, depending on the specific shaft size and load conditions.

Q: Does this coupling require lubrication?

A: No, the elastic star jaw design is maintenance-free and does not require any lubrication during operation.

Q: Is this suitable for outdoor machinery exposed to rain?

A: While the aluminum is anodized for corrosion resistance, we recommend additional protection or housing if the unit will be directly exposed to heavy rain or harsh chemicals.

Q: Can I replace just the rubber spider if it wears out?

A: Yes, the elastomeric star element is designed to be easily replaced without removing the hubs from the shafts.

Q: What shaft tolerances do you recommend for installation?

A: We recommend a standard H7/g6 fit for optimal performance and to prevent slippage under high torque loads.

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