| 摘要 |
An improved radially expandable honing mandrel construction wherein a radially extendable work engaging portion can be positively retracted into the body member of the mandrel by operation of the adjusting member in a direction opposite its direction for expanding the work engaging portion, which positively retracting feature comprises a surface adjacent one side of the work engaging portion and a tab extending from the side of the adjusting member for engagement with the surface to retract the work engaging member when the adjusting member is operated in a direction opposite from that used for expanding the work engaging member, the surface and tab also cooperating to retain the work engaging portion in the mandrel. The invention also includes structure on the mandrel engageable with the adjusting member to prevent lateral movements thereof in the body member.
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