Apparatus for mounting a hollow cylindrical member

Apparatus for mounting a hollow cylindrical member, comprising in combination:

• an arbor;
• a chuck mounted longitudinally slidable on said arbor for releasably retaining said hollow cylindrical member;
• self-lock means coupled to said arbor and chuck for automatically locking said slidably mounted chuck in any position on said arbor;
• and
• means connected to said self-lock means for selectively overcoming said automatic locking action and adjusting the position of said chuck on said arbor to an axial dimension of said hollow cylindrical member.

A chuck for releasably retaining a hollow cylindrical member, comprising in combination:

• an expansible device for engaging said hollow cylindrical member;
• a pair of tensioning members having meshing threads and being coupled to said expansible device for retaining said hollow cylindrical member with said expansible device;
• and
• means on said pair of tensioning members for releasably locking said tensioning members relative to each other.

A chuck for releasably retaining a hollow cylindrical member, comprising in combination:

• an expansible device for engaging said hollow cylindrical member;
• a pair of tensioning members having meshing threads and being coupled to said expansible device for retaining said hollow cylindrical member with said expansible device;
• and
• means on said pair of tensioning members for releasably locking said tensioning members relative to each other, including a manually slidable locking member located on one of said tensioning members for selectively engaging the other tensioning member.