Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Couplings
Origin	-
Material	High-Grade Aluminum Alloy
Coupling Type	Plum Jaw (Star Elastic)
Precision Level	High-Precision CNC Machined
Shaft Compatibility	Servo Motor & Leadscrew Modules
Flexibility	Elastic Star Insert for Vibration Damping
Torque Capacity	High Torque Transmission
Misalignment Compensation	Angular, Parallel, and Axial
Surface Finish	Anodized Anti-Corrosion Coating
Operating Temperature	-30°C to 80°C
Application	CNC Routers, 3D Printers, Robotics

6 reviews

Anonymous

Mar 27, 2026

Rating: 5/5

Perfect fit for my CNC upgrade

The build quality is exceptional. The aluminum feels solid and the machining is precise. It eliminated the backlash I was experiencing with my old plastic coupler.

Anonymous

Mar 22, 2026

Rating: 5/5

Sturdy and reliable

Replaced a worn-out part in my 3D printer leadscrew module. This ERSIID coupler is much sturdier and the anodized finish looks professional.

Anonymous

Mar 20, 2026

Rating: 4/5

Great value, minor shipping delay

The coupler itself works flawlessly on my servo motor setup. The star insert provides excellent vibration damping. Only giving 4 stars because shipping took a bit longer than expected.

Anonymous

Mar 19, 2026

Rating: 5/5

High precision as advertised

I use these for high-speed robotics applications. The balance is perfect, and there is no wobble even at high RPMs. Highly recommended for precision work.

Anonymous

Mar 08, 2026

Rating: 4/5

Good performance

Does exactly what it is supposed to do. The elastic element absorbs shocks well. Make sure to measure your shaft diameters carefully before ordering.

Anonymous

Mar 05, 2026

Rating: 5/5

Excellent engineering

The tolerance levels are impressive. Installation was straightforward, and the coupling has held up perfectly under continuous operation for three months now.

5 FAQ

Q: What is the maximum misalignment angle this can compensate for?

A: The plum jaw design allows for an angular misalignment compensation of up to 1.5 degrees, along with minor parallel and axial offsets.

Q: Can this handle high-speed applications above 3000 RPM?

A: Absolutely. The aluminum alloy construction and dynamic balancing make it suitable for high-speed operations typically found in servo motor applications.

Q: What shaft diameters does this coupler support?

A: This model is available in various bore sizes ranging from 5mm to 20mm. Please select the specific combination required for your motor and leadscrew from the dropdown menu.

Q: Is the star insert replaceable if it wears out?

A: Yes, the polyurethane star elastic insert is designed to be replaceable. You can purchase spare inserts separately to extend the life of the coupling.

Q: Does it come with set screws?

A: Yes, each coupler comes packaged with the necessary high-strength set screws for secure installation on both shafts.

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