4Pcs 6mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors

parfait

Made new extensions for long selector, volume and tone controls when plastic coupling broke. They work well

These are listed as 4mm flanged couplers which is exactly what I need. First set I got measure in as 4.98mm and the same goes for the second set. Way too much wiggle room for my motor shaft which measures 3.98mm. I bought a set of 8mm ones from them which are perfect measuing at 8.02mm, so why cant they get these ones right?

The product is good (8mm flange) but the package is too fragile, arrived broken (the packing bag) and the lock screws were missing, they probably fell off the box because they were not screwed to the flange and since they are very small they fit between the box gap.

These are excellent! Fit and finish is perfect. Using these on 28BYJ-48 stepper motors. Great deal for the price.

All 4 couplings were not 4mm. They were about 3.6-3.7 mm, which meant my 4mm shaft didnt fit. Probably defect if others got the right size.

These are nice and easy to install. The material holds up well enough. They require a very predictable application, though. I made a tin can bot (The Ravioli-Poli) and used these to fasten the wheels. The jarring and pulling from turning loosened the set screw until both were loose and a wheel fell off. It wasnt stripped tho, hence the positive review. Just consider your application.

Works well to couple motor to connector shaft. Would recommend.

Un peu petit et les trous pas filté

The bag arrived ripped open. Now the 4 flanges and the allen key were in the bag, but all 8 screws were missing from the bag. I need 8 screws to fit those 4 flages. I sure wish someone would contact me.