Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Couplings
Origin	-
Material	High-Grade Aluminum Alloy
Coupling Type	Single Diaphragm Flexible
Connection Method	Keyway and Set Screw
Application	Servo Motor to Lead Screw
Flexibility	Elastic Variable Diameter
Torque Capacity	Medium Duty Precision
Misalignment Compensation	Angular and Parallel
Surface Finish	Anodized Black
Operating Temperature	-20°C to 80°C
Package Includes	1 x Coupling, 4 x Set Screws

6 reviews

Anonymous

Mar 28, 2026

Rating: 4/5

Great value for precision work

For the price, the tolerance levels are impressive. The keyway slot is cut cleanly. I deducted one star only because the included hex key was a bit flimsy, but the coupling itself is top-notch.

Anonymous

Mar 24, 2026

Rating: 4/5

Good quality, check your shaft sizes

The aluminum feels very sturdy and the machining is precise. Just make sure to measure your motor shaft and lead screw diameters carefully before ordering, as the variable diameter range is specific. Works great for my 3D printer project.

Anonymous

Mar 23, 2026

Rating: 5/5

Excellent vibration damping

I was experiencing resonance issues with my previous setup. Installing this elastic connector solved the problem immediately. The flexibility allows for smooth power transmission without transferring excessive vibration to the motor bearings.

Anonymous

Mar 23, 2026

Rating: 5/5

Solved my alignment headaches

Aligning two shafts perfectly is always a challenge. This flexible coupling forgives small errors in parallel and angular alignment, saving me hours of tweaking. Highly recommended for hobbyist and light industrial use.

Anonymous

Mar 10, 2026

Rating: 5/5

Perfect fit for my CNC upgrade

This coupling replaced a rigid connector on my Z-axis lead screw. The single diaphragm design absorbs minor misalignments perfectly, resulting in smoother motion and less motor noise. The keyway ensures zero backlash.

Anonymous

Mar 09, 2026

Rating: 5/5

Reliable industrial component

We used these in a small automation cell for connecting servo motors to ball screws. They have been running 24/7 for three months without any signs of wear or loosening. The set screws hold tight under load.

5 FAQ

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

A: For standard aluminum alloy single diaphragm couplings of this size, the safe operating limit is typically up to 4,000 RPM, depending on the specific bore diameter and load conditions.

Q: How do I install the keyway properly to avoid damage?

A: Ensure the key fits snugly in both the shaft and coupling keyways before tightening. Do not force the coupling onto the shaft. Tighten the set screws evenly using a calibrated torque wrench according to the provided specification sheet.

Q: Does this coupling support both metric and imperial shaft sizes?

A: This specific model is designed for metric shafts. Please check the product variation dropdown for imperial sizes if required, or contact us for custom bore options.

Q: Are the set screws included made of steel or stainless steel?

A: The included set screws are made of hardened alloy steel with a black oxide finish to ensure a secure grip on the shaft without stripping.

Q: Can I use this for high-torque applications like a main spindle drive?

A: This is a medium-duty coupling designed for servo motors and lead screws. For high-torque main spindle drives, we recommend our double diaphragm or bellows couplings which offer higher torque capacity.

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