OPENTECHNICAL PUBLICATION
OT-2026-000000874

Impact power tool

Published: 2026-09-15T19:03:31.586571Z
Permanent URL: https://opentechnical.org/p/OT-2026-000000874
Categories: Tools & Tooling > Powered Hand Tools

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ABSTRACT

An impact power tool includes a transmission output shaft, a rotary impact
assembly with a cam shaft, hammer, and anvil, and a tool output shaft
rotatable with the anvil. A coupler removably couples the cam shaft to the
transmission output shaft. When torque on the tool output shaft is less than
or equal to a first threshold, the transmission output shaft, cam shaft,
hammer, and anvil rotate together to transmit torque to the tool output shaft.
When torque on the tool output shaft is above the first threshold, the hammer
moves along the cam shaft away from the anvil by a first distance and applies
rotary impacts to the anvil. When the hammer moves along the cam shaft away
from the anvil by a second distance greater than the first distance, the
coupler decouples the transmission output shaft from the cam shaft,
interrupting torque transmission to the tool output shaft.

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OpenTechnical publication OT-2026-000000874
Published 2026-09-15T19:03:31.586571Z
https://opentechnical.org/p/OT-2026-000000874