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    as cold heading wire among them including Types 303 410 430 440C UNS S17400 and a number of proprietary stainless steels. Type UNS S30430 is a copper bearing stainless steel often referred to as Alloy 302 HQ which is a proprietary trade name. Type UNS S30430 is described on page 17. Disc spindle for water meter formerly screw machined

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    The wire utilized within the windings should be protected. But in some cases we can see the windings like bare copper but it’s simply coated with enamel. The most commonly used material for winding is copper. Aluminum can also be used but it should be thicker to hold a similar load securely. The copper winding allows for a tiny sized motor.

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    The spark plug is a major element of the equation. A new spark plug may require around 10 000 volts to jump a .030 gap when the engine is cold. This drops to just 4 000 when the engine is hot as electrons are more easily emitted from a hot surface. That s one of the reasons the old vacuum tubes in radios had to warm up before the radio would work.

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