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

good

Description claims that they are heat treated steel. However they are easily drilled and produce a shaving consistent with the cast iron. Spark test also points on the cast iron. Shaft holes are not rimmed and not very accurate. Flange is OK for a non-critical application. I would not use them for a hi-RPM applications or for a powertrain.

Was only given 4 out of 8 M4 fasteners, 3 of which were not in the bag. The bag was very difficult to open without cutting. Very small lip on the ID towards the base that would have to be removed to use them as a mid shaft through mount.

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.

Ive bought multiple sizes and all have been the same quality so Im posting the same review for all. Inside diameter fits the motor shaft very well and the face is perpendicular to the shaft. The small set screws and threaded holes they go into fit perfect. Even the hex wrench thats included is strong. The parts have no burrs or sharp edges.

Fast service, quality product

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?

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

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

Le paquet est arriver avec seulement 2 flange et il manque les visses de blocage !