File:Spiral-screwdriver.jpg
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Summary
<a href="//commons.wikimedia.org/wiki/Screwdriver#Ratcheting_screwdrivers" title="Screwdriver">push drill</a>, one of the very few mechanisms that use a screw in the "backwards" sense, to convert linear motion to rotational motion. It has helical screw threads with a very large pitch along the central shaft. When the handle is pushed down, the shaft slides into pawls in the tubular stem, turning the bit. Most screws are "self locking" and axial force on the shaft will not turn the screw.
Licensing
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 08:37, 9 January 2017 | | 1,088 × 118 (110 KB) | 127.0.0.1 (talk) | <i><a href="//commons.wikimedia.org/wiki/Screwdriver#Ratcheting_screwdrivers" title="Screwdriver">push drill</a></i>, one of the very few mechanisms that use a screw in the "backwards" sense, to convert linear motion to rotational motion. It has helical screw threads with a very large pitch along the central shaft. When the handle is pushed down, the shaft slides into pawls in the tubular stem, turning the bit. Most screws are "self locking" and axial force on the shaft will not turn the screw. |
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