Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Couplings
Origin	-
Material	High-Strength Aluminum Alloy
Coupling Type	Flanged Step Diaphragm
Configuration	Single/Double Coupling
Connection Method	Elastic Keyway
Compatible Motors	Servo and Stepper Motors
Driven Component	Lead Screw
Torque Capacity	High Torsional Rigidity
Misalignment Compensation	Angular, Parallel, and Axial
Surface Finish	Anodized Black
Application Range	CNC Machinery and Robotics

6 reviews

Anonymous

Mar 30, 2026

Rating: 5/5

Reliable for high-precision tasks

Using these on a custom robotics arm. The torsional rigidity is impressive for an aluminum component. It handles the servo motor torque without any flex under load.

Anonymous

Mar 28, 2026

Rating: 5/5

Sturdy and well-machined

The machining quality on the keyway is precise. No wobble or play detected after weeks of continuous operation. Highly recommend for DIY CNC projects.

Anonymous

Mar 27, 2026

Rating: 4/5

Solid performance, slight sizing note

Great aluminum alloy construction that feels durable. Just ensure you measure your shaft diameters carefully before ordering. Once installed, it runs smoothly with zero backlash.

Anonymous

Mar 25, 2026

Rating: 5/5

Excellent vibration damping

I was experiencing some vibration issues with my previous rigid coupling. Switching to this diaphragm type solved the problem immediately. The elastic keyway absorbs shocks effectively.

Anonymous

Mar 19, 2026

Rating: 4/5

Good value for money

Does exactly what it says on the tin. The double coupling option provided the flexibility I needed for my misaligned shafts. Delivery was fast too.

Anonymous

Mar 14, 2026

Rating: 5/5

Perfect fit for my CNC upgrade

The LK3 coupling installed seamlessly on my stepper motor and lead screw setup. The flanged design made alignment much easier than standard couplings. Very satisfied with the build quality.

5 FAQ

Q: Does this coupling come with set screws or clamps?

A: The LK3 series typically utilizes an elastic keyway design for secure connection, but specific mounting hardware may vary by bore size. Please check the detailed specification sheet for your selected size.

Q: Can this handle high RPM applications?

A: Yes, the aluminum alloy diaphragm design is balanced for high-speed rotation, making it suitable for most servo and stepper motor applications within standard industrial RPM ranges.

Q: Is this compatible with metric and imperial shafts?

A: We offer bore sizes in both metric and imperial measurements. Please select the specific combination required for your motor and lead screw during the ordering process.

Q: How do I maintain this coupling?

A: The LK3 aluminum coupling is maintenance-free under normal operating conditions. Periodically inspect for physical damage or excessive wear, but no lubrication is required for the diaphragm element.

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

A: The single diaphragm version generally allows up to 1 degree of angular misalignment, while the double coupling configuration can accommodate slightly more depending on the specific model dimensions.

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