Difference between revisions of "Washer"
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PorterParker (talk | contribs) (Created page with "=Types= ==Flat washer== ===Flat washer=== ===Fender washer=== ==Spring washer== ==Lock washer== these do not lock, they resist loosening with varying effectiveness. <span st...") |
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==Spring washer== | ==Spring washer== | ||
==Lock washer== | ==Lock washer== | ||
| − | + | Lock washers do not lock, they resist loosening with varying effectiveness. They're designed to be a spring between the bolt head and what it's fastened in, but they are quite weak. | |
| − | + | ===Split washer=== | |
| − | |||
| − | |||
===Serrated washer=== | ===Serrated washer=== | ||
===Wedge lock washer=== | ===Wedge lock washer=== | ||
| + | One of the few types of washer that actually do resist vibration effectively. The washers incorporate a wedge shape with a slope angle greater than the angle of the threads, meaning that any rotation of the fastener results in increased clamping rather than reduced. "Nordlock" is the main brand of wedge lock washer. <br /><br />However suitable they seem for fastener locking, they can be harder to inspect than safety wire and will generally not pass [[scrutineering]] (at [[List of competitions|FSG]] at least). | ||
| + | |||
=Further Reading= | =Further Reading= | ||
* [https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19900009424.pdf NASA Fastener Design Manual] | * [https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19900009424.pdf NASA Fastener Design Manual] | ||
* <span>Carroll Smith's<span></span></span>''Screw to Win'' | * <span>Carroll Smith's<span></span></span>''Screw to Win'' | ||
| + | ''[[category:Fasteners]]'' | ||
Latest revision as of 07:47, 26 May 2020
Contents
Types
Flat washer
Flat washer
Fender washer
Spring washer
Lock washer
Lock washers do not lock, they resist loosening with varying effectiveness. They're designed to be a spring between the bolt head and what it's fastened in, but they are quite weak.
Split washer
Serrated washer
Wedge lock washer
One of the few types of washer that actually do resist vibration effectively. The washers incorporate a wedge shape with a slope angle greater than the angle of the threads, meaning that any rotation of the fastener results in increased clamping rather than reduced. "Nordlock" is the main brand of wedge lock washer.
However suitable they seem for fastener locking, they can be harder to inspect than safety wire and will generally not pass scrutineering (at FSG at least).
Further Reading
- NASA Fastener Design Manual
- Carroll Smith'sScrew to Win
'
