| 摘要 |
A core chuck 30 includes "lock and key" or "key and keyhole" interfaces 65, 60 between the central cam 34 and the mounting plate 32 and the central cam 34 and the end cap 36. The central cam 34 includes central region having a multi-faceted camming surface 40 adapted to expand and retract a plurality of jaws 48 as is well known. Unlike known core chucks, the first end 22 of the central core 34 has a non-circular perimeter and the mounting plate 32 includes a cavity 56 sized and shaped to substantially correspond to the non-circular perimeter of the central core 34 and form a "lock/key" or "key/keyhole" arrangement. A plurality of fasteners 44 secure the central cam 34 to the mounting plate 32 with their heads disposed proximate the second end region 50 of the central cam 34. The end cap 36 includes a second cavity 60 sized and shaped to form a "lock/key" or "key/keyhole" arrangement with the heads of the fasteners 44. |
