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Old 01-08-2007, 07:18 PM
VW cat VW cat is offline
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Default Repairing a worn pin hole

There's got to be a better way I said to myself, after welding inside a 1 1/2"pin hole on my machine and trying to resize it with a round stone. My new Dewalt grinder doesn't sound right now after the stone shuddered and broke in the hole. It was doing a good job when it broke. After 3 stones, I was trying to visualize a homemade lineboring machine, even a china one would look good. I knew I had to turn here for help. Is there a reasonably priced tool out there to do this job or am I missing an easier way.Phil
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Old 01-08-2007, 07:27 PM
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some good reading

http://www.shopfloortalk.com/forums/...ght=lineboring
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  #3  
Old 01-08-2007, 07:31 PM
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Do a search on line bore. There are several lines related including one homade one.
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Old 01-08-2007, 07:32 PM
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Can't you drill it out and bush it?
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Old 01-08-2007, 08:21 PM
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A picture is worth a thousand words. Do you have one ?

Take a block of steel 4-1/2" long and drill a 1-1/2" hole thru it. weld it to your machine and use it as a drill guide and drill your 1-1/2" hole.
Grind off the block after your finished. or make a second one if you have a second flange. weld it to the second flange BUT use a long 1-1/2" dia pin to line up the second bushing thru the first hole you just drilled.
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Old 01-08-2007, 08:25 PM
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when repairing whopped out holes i will turn down a carbon plug and weld it up, after it cools chip the carbon out and you have a perfectly round hole. if you don't have carbon large enough or don't have access to carbon stock i have used carbon gouging rods also, just have to stuff in as many as you can get to fit, weld up and grind out the small ridges.
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Old 01-09-2007, 01:23 AM
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I have cut out the bushings or bosses and had new ones made up at a machine shop and then weld them back in

On the lineboring heres about the cheapest ones I've found for sale on the net
American Machine Tools

Lineboring Tools

Or if you want to go all out heres some of the best (I think)

York machine

Climax Machine Tools

James
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Old 01-09-2007, 05:56 PM
VW cat VW cat is offline
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I got the machine back together this morning, job had to get finished and it was acceptable the way it turned out . I didn't want to cut the bosses off but that would have been the best way due to the tight spot I was in. Thanks for all the good ideas and the links, sorry no pics. I've made it a goal to make one of these line-boring machines, the end result is so accurate. Phil
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