Device for removing components from shafts

A tightly fitted assembly, comprising:

• a shaft member having a free end portion provided with an axially extending tapered surface;
• a second member having a mounting hub provided with a tapered internal bore complimentary to the tapered surface of said shaft member and mounted on said shaft member with an interference fit therebetween;
• an axially extending fluid supply passage in said shaft member adapted to be connected in communication with a source of pressurized fluid;
• a first radially extending fluid passage in said shaft member providing fluid communication between said supply passage and the periphery of said tapered surface;
• stop means on said shaft member;
• axially extending piston cylinder means formed in said second member;
• piston means axially abutting said stop means reciprocably mounted within said piston cylinder means to form a fluid chamber therewithin;
• and
• a second radially extending fluid passage in said shaft member providing fluid communication between said supply passage and said chamber;
• whereby
• upon predetermined fluid pressurization of said passages, fluid pressure in said first passage acts to expand the bore in said second member to reduce the interference fit between said members while fluid pressure in said second passage and said chamber acts to urge said second member axially away from the tapered surface of said shaft member.