Shaft-carried speed reducer having adaptable mounting arrangement

An adaptable arrangement for securing an element including a hub defining a substantially cylindrical axial bore to a shaft for rotation therewith, said arrangement comprising:

• at least one removable adapter having a substantially cylindrical axially extending outer surface and a tapered interior surface and defining an axial expansion slot, said adapter configured for insertion into said axial bore of said hub such that a lesser inner diameter end thereof, having an end surface substantially perpendicular to said outer surface, will be inserted farther therein than a greater inner diameter end thereof;
• at least one sleeve member for receipt about said rotatable shaft, said sleeve member having a flange portion at one end thereof and an exterior tapered portion defining an axial contraction slot;
• means for compressing said sleeve member and said removable adapter such that said exterior tapered portion of said sleeve member will engage said interior tapered surface of said removable adapter to effect securement of said element to said shaft;
• and
• means, removably disposed in said bore, for contacting said greater inner diameter end surface of said adapter and for maintaining said adapter in a predetermined position as said sleeve member and said removable adapter are compressed by said means for compressing.