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Re: Oil Plugs - Simple Question
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Posted by Wardner on February 09, 2007 at 11:18:55 from (206.148.20.153):
In Reply to: Oil Plugs - Simple Question posted by SuperA-Tx on February 09, 2007 at 10:57:48:
It seems you have a steel plug, made from round bar, as opposed to a cast plug. The square hole was broached square after drilling. The pattern you see are the chips that were not torn out during the broaching process. I suppose a cast plug could also be broached for a better tolerance. It is likely, however, that the chips would separate from the plug and fall out. If the plug was forged steel, it is not likely to have been broached. The only machining would be the pipe thread. Each process is dependent on OEM costs and available equipment.
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