washer


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washer

1. a flat ring or drilled disc of metal used under the head of a bolt or nut to spread the load when tightened
2. any flat ring of rubber, felt, metal, etc., used to provide a seal under a nut or in a tap or valve seat
4. Chemical engineering a device for cleaning or washing gases or vapours; scrubber
5. Austral a face cloth; flannel
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Washer

 

a machine part mounted under a nut or bolt head. Plain washers (Figure 1, a) are used to increase the load distribution where the load-bearing surface is uneven or of a soft material, where the bolt hole is elongated, or where the hole diameter is enlarged. Bevel washers (Figure l,b) and spherical washers (Figure 1, c) are used to prevent the nut or bolt head from warping during tightening. Open, or C, washers (Figure 1, d) are quick-release types used in fixtures to save time in removing a used part and mounting a new one. Packing washers made of a soft material

Figure 1. Washers: (a) plain, (b) bevel, (c) spherical, (d) open, (e) spring lock, (f) tab lock, (g) end plate

are mounted under the heads of threaded plugs to provide a hermetic seal. Spring lock washers (Figure l,e) reduce the likelihood that a bolt or nut will loosen since the elastic force of the compressed washer acts on the connection. Tab lock washers have sections that can be bent (Figure 1, f) to prevent a nut or bolt from turning with respect to a load-bearing shaft or other part. End plates (Figure 1, g) prevent axial displacement of parts mounted on a shaft (such parts may be held fixed or rotate on the shaft).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

washer

[′wäsh·ər]
(design engineering)
A flattened, ring-shaped device used to improve the tightness of a screw fastener.
(engineering)
A device for removing dirt and soluble impurities from pulp and paper stock.
A system for washing photographic materials to remove soluble products of developing or fixing.
A power-driven machine for washing clothes and household linens. Also known as washing machine.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

washer

washers
A flat ring, usually thin, of metal, rubber, or other material, depending on its use; used to prevent leakage, to provide insulation; used as the bearing surface under the head of a fastener, such as a bolt, to assure tightness, relieve friction, improve stress distribution, or span large clearance holes.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Nowadays, there are a lot of different models and styles of washers to choose from.
Also, a high-pressure washer saves time and labor in cold regions, where washers are dumped daily to prevent freezing.
Ask a friend to hold the ends of the shoelace, one in each hand, up by his ears, so that the washers hang down his back, like in the drawing on the previous page.
One newspaper insert of six pages flagged a Frigidaire "extra-large-capacity/1 cycle, 1 speed" washer and "time-dry" dryer at $148.88 apiece.
The worldwide market for labware washers was about $55 million in 2002.
* buy one high-speed and one low-speed washer extractor.
For example, if your pressure washer needs 2-1/2 gpm, time how long it takes your garden hose to fill a 5-gallon pail.
Researchers today emphasize data acquisition (usage of continuous methods, locating cells at the ambient, round robin testing, etc.), whereas analysis at WIDL clearly shows the non-uniform state os stress within the washer used in the industry.
"We decided to get back into the pressure washer business primarily because of requests from our customers.
Leading clothes washer manufacturers support the new regulations, as they see in the mandates a chance to standardize international operations (front-loaders are de rigeur under EU regs) and increase profits and market share by squeezing out smaller manufacturers who won't be able to stay in business under the new rules.
According to Mitsui Chemicals, its Aurum thermoplastic polyimide is both tough and heat-resistant enough to replace expensive bronze cast over steel thrust washers in a mining vehicle transmission.