Marks DTM Calib wrote on 01. Apr 2011 at 13:12:
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1.2505 to 1.2525 (31.763mm to 31.788mm) to be precise.
I have a 1.25 inch reamer here and will be having a crack with it (its a machine one) tonight. I also have an adjustable reamer (hand) but lack the knowledge to use it.
The big issue is that the engine machine shop I use cant do little ends that large! (although its only a small rod)
Ah! We definitely won't have anything that specific.
A man of your calibre will soon work out how to work an adjustable reamer.
As you slacken & tighten the screwed collar at each end, the blades slide up & down a sloping groove which makes the blades increase or decrease the dia of the reamer. If you're altering it over it's full size range, do it a bit at a time otherwise you can end up with all the blades falling out.
I've had varying degrees of success with adjustable reamers as you can end up with a bore full of chatter marks.
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