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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.