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

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?

Utiliser pour ma sableuse a tambour que j ai fabriquer,

parfait

I needed a way to mate a small 5V motor to a ROKR Marble Run puzzle. These coupling flanges fit the 3.5mm shaft of the motor and offered a simple way to attach itself to the crank. They came with two set screws for each of the four flanges, although one was missing. That didnt matter, because I didnt need them all anyway. I have three unused flanges if anyone needs one.

8mm shaft - perfect fit - thread tolerances are good.

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

Exactly what I wanted, and it arrived two weeks early.

It is a perfect little coupler.

Good quality material and built as it should be. Worked as needed.

Just tried to use my 6 mm shaft only to realize that its 5.9 mm and doesn’t fit. Super lame, if anything it should be 6.1mm , that’s what the set screws are for!!!!