Gallery, Projects and General > How do I??

Enlarging Holes in Thick Plate

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awemawson:

--- Quote from: Manxmodder on May 14, 2014, 12:30:12 PM ---Just another thought, what about using an expanding reamer,a little labourious but I think it would get you the result....OZ.

--- End quote ---

Yes I thought about that as well ! However access is very difficult, the machine is balanced precariously, and the thought of trying to turn an adjustable reamer, keep it in line, all lying on the floor under a heavy implement doesn't appeal :)

Manxmodder:
It will be interesting to see how you solve this,please post up a couple of photos of the job in progress....OZ.

tom osselton:
Can you make a boring bar that fits the existing holes? Then just set the cutter for the 1" dia with a 1" plug to slip on  for when doing the other side to keep the holes lined up, you should be able to use a drill to power it.

BillTodd:
tom beat me to it :)

just a length of 22 mm bar with a hss or carbide single point cutter mounted in it. single point could be driven with a good battery drill if necessary.

clamp.on a couple of extra 22mm holes as  guides.

bill

DaveH:
I would go with the hole saw and plenty of cutting fluid - remember it is a round hacksaw blade.  :)
In stead of of the 1/4" drill bit use a 22 mm diameter guide. The hole will probably come out a bit bigger than 25mm - well mine always do  :Doh:
 :beer:
DaveH

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