Flexible Coupling OD:20mm x L:25mm Bore: 5x8mm

This flexible type motor coupling can connect your driving shaft with the driven shaft while it is very efficient in eliminating any misalignment to the possible extent. Minimum backlash is another great advantage of this Flexible Coupling OD:20mm x L:25mm Bore: 5x5mm.

This Flexible coupling with the outer diameter of 20mm and the length of 25mm is machined aluminum coupling.

The screws that clamp the shafts will be tightened, but not too much. These types of clamping couplings will not damage the shafts. 

It comes with the spiral cut in the middle along its length which makes it flexible so they can be fit to two shafts even if they are not perfectly co-linear and will help reduce binding effects. Such couplings are also known as Beam coupling, helical coupling, Flexible coupling.