OPENTECHNICAL PUBLICATION
OT-2026-000003437

Torque driving tool and retainer for driven member

Published: 2026-09-15T20:27:30.428561Z
Permanent URL: https://opentechnical.org/p/OT-2026-000003437
Categories: Tools & Tooling > Clamping Tools

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ABSTRACT

A rotatable driving tool for imparting torque to a driven member, such as a
threaded fastener having an axial recess in the head thereof, comprises a
circularly cylindrical body with a plurality of substantially circularly
helical driving portions projecting laterally therefrom and equiangularly
spaced about the cylindrical axis, each of the driving portions having a small
helix angle, preferably between one and three degress. The driving portions
mate with lobes of the fastener recess but are slightly inclined with respect
thereto to provide a wedge fit to retain the fastener in engagement with the
tool body.

1. Drawings

[0001] Sheet 1.

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OpenTechnical publication OT-2026-000003437
Published 2026-09-15T20:27:30.428561Z
https://opentechnical.org/p/OT-2026-000003437