Studs, Scrapers and Hot Oil
Sep 10, 2019
5 minutes
by Jon Chabot
14mm press-in wheel studs
I am installing 14mm press-in wheel studs, to use with lug nuts for brake drums in place of the stock wheel bolts… I would like to know what size drill bit to use to drill out the existing threaded holes.
Clint Parrish Tacoma, WA 98407
Clint, the short answer is 9/16 inch, but there is a whole lot more to it than that! It’s quite technical actually. Failure to check dimensions and specs can result in cracked or crumbled cast iron around the stud holes.
First, I would like to say that all press-in studs are not created equal. Many of the “imported” studs have knurling dimensions that are all over the chart (as in “everyone different”). I prefer to use either USA-produced or
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