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Old 15th Mar 2021, 12:30 pm   #4
Join Date: Jan 2007
Location: Bristol, UK.
Posts: 1,186
Default Re: Enlarging an existing hole in a steel chassis.

I would use a taper reamer like this obtainable from most of the usual suspects. ebay, Amazon etc.
Other options might include a step drill but that will usually cut in 2mm intervals so 22mm is nearest.
Good luck
Chris Wood
BVWS Member
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