| 摘要 |
<p>An improved rotary tool head (10) includes a modular embodiment having a shaft (16) with a tapered insertion end (18) to ease insertion into a handpiece (12) socket (11) and to cause self-alignment of the shaft with the socket. Another embodiment of the improved rotary tool head includes a collet (52) with nonlinear slots (56) separating the collet tangs (54). The nonlinear slots cause a wire or shaft inserted into the collet to be centralized in the collet and prevent the wire or shaft from protruding between the tangs. <IMAGE></p> |
