Wide
variety of methods which will depend on the component: drive collar,
seal face and sleeve.
Drive
mechanisms transmits torque from the shaft to the rotating face, keep
the stationary seal face from spinning in the pump flange and fix
the drive collar to the shaft.
In cartridge
seals the sleeve will have an axial force from the hydraulic piston
effect. Its drive mechanisms is used to keep the sleeve from moving
axially.
Space
in the pump may be an important factor.
Shaft
material hardness may be critical.
Drive
mechanisms can wear out prematurely if excessive run out occurs in
the seal area of the pump.