variety of methods which will depend on the component: drive collar,
seal face and sleeve.
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.
seals the sleeve will have an axial force from the hydraulic piston
effect. Its drive mechanisms is used to keep the sleeve from moving
in the pump may be an important factor.
material hardness may be critical.
mechanisms can wear out prematurely if excessive run out occurs in
the seal area of the pump.