Replacing a A-frame Jack, need to enlarge 2" hole to 2-1/4"

Grind away. 1/8" all the way around. That does sound unusual. They is a standard.

weld a plate over the hole and use the right bit.
bumpy

Bumpyroad wrote:
weld a plate over the hole and use the right bit.
bumpy

A 2 1/4 inch metal bit?! Does he use a 3/8 or 1/2 inch drill motor? (Sarcasm on). Grinding seems much more practical for the average DIY selfer. Someone who does not own a metal working shop anyway.

Exchange jack for one with a 2" tube.

2 1/4 hole saw is about $15 at any hardware store

Use a grinder bit in your drill....just keep going round and round until the hole is the size you need.

K Charles wrote:
2 1/4 hole saw is about $15 at any hardware store

The original hole will still have to be enlarged since the new jack will pass thru that. And I find enlarging an existing hole, with a hole saw, to be a tough job tho I'm sure there are tricks I don't know.

A good 2 1/4 in bimetallic saw blade runs about $18 plus a mandrel at $15 if you don't have one. A grinding stone is probably less than $5

I was thinking of using my sawzall with a diablo metal blade and cutting 8 cuts about 1/4 of a inch in and using a vicegrip to bend them out some and then tapping the jack into the hole. The top hole in the A frame is big enough, just the bottom hole is too small. The metal is less than 1/8"

Drill a 2-1/4" hole in plywood or steel and clamp over existing hole centering the template over existing hole. Drill away, ez-p-ze.

WhatCummins12V98 said. Piece of pie! The circle
you drill out of your guide piece is called a rountuit. Now you have a rountuit for all those things you have been putting off till you get a rountuit!