Production of insulating washers. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Production of insulating washers. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Ham Radio Technologies

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When repairing and designing radio and electrical equipment, it sometimes becomes necessary to manufacture insulating washers or round gaskets from getinax, textolite, plexiglass and other types of plastic. Similar products can be made quite quickly using a spade drill for wood (Fig. 1).

Production of insulating washers

A set of cutting inserts will allow you to make a wide range of washers. If you are not satisfied with their inner diameter, it can be drilled to the required size. When working with plastic, it should be remembered that its melting varieties must be processed at low speeds.

Using a cutting stone or "vulcanite", you can make cutting inserts yourself from old hacksaw blades, kitchen knives, etc., as well as a special insert (Fig. 2), which, paired with a regular one, will allow you to make it in two passes (on both sides plastic sheet) a very scarce washer with two outer diameters. Most often, such a washer is used to isolate transistor heatsinks from the chassis. Usually it is made from two different washers, but this method is not suitable for mass production of identical products.

Production of insulating washers

Initially, the technology for manufacturing plastic washers using spade drills was developed for the manufacture of bearing washers for the rotors of washing machines, but it has proven itself to be very fast and high-quality, therefore it can be recommended to a wide range of amateurs.

Author: Yu.Borodaty

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