| 摘要 |
<p>A ball lock punch and die retainer comprises a single piece body of high strength through hardened tool steel having a relieved flat bottomed borehole for the punch. The exterior sidewall of the retainer opposite the end having the punch borehole is substantially half-cylindrical. The oblique spring hole in the retainer body includes a circumferential undercut in the wall of the spring hole. The undercut mates with an enlarged portion of the spring to prevent the spring from pushing out of the hole.</p> |
