Patent ID: 8205531

Claim:
A chuck device comprising: a tubular housing formed with an axial hole that has a hole axis; a center unit disposed in said axial hole in said tubular housing, extending along the hole axis, and having a tip extending outwardly of said tubular housing and adapted to abut against a center of an end of a workpiece; a chuck unit disposed movably in said axial hole in said tubular housing, sleeved on said center unit, and including a chuck member disposed adjacent to said tip of said center unit; and a sleeve unit disposed movably in said axial hole in said tubular housing, concentric with said tubular housing and sleeved on said chuck unit, said sleeve unit having a pushing end portion sleeved on and abutting against said chuck member of said chuck unit; wherein said sleeve unit is operable to move relative to said tubular housing along the hole axis such that said chuck member of said chuck unit is driven by said pushing end portion of said sleeve unit with movement of said sleeve unit to move away from said tubular housing and to clamp the end of the workpiece.