Apologies for what is no doubt a simple question but I have to increase the hole in the bearing below from 2mm to 3mm. Is the best tool a 3mm drill or a reamer to take the hole out to 3mm?
Best tool for the job
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Re: Best tool for the job
I would use a drill slightly smaller than 3mm (in a vertical drill if you have one) and then finish off with a reamer.
Philip
Philip
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Re: Best tool for the job
Thanks Philip, don't have one but I can get access to a vertical drill.
John
John
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Re: Best tool for the job
John,
Doesn’t have to be a vertical drill, it’s just a bit easier to hold the bearing flat on a drilling pad (posh name for a bit of wood). The drill should follow the hole. Don’t run the reamer all the way through at first, because the fit on your chosen axle might not warrant it. Then again, you might have to run it through all the way several times to get a running clearance rather than a sliding fit.
Philip
Doesn’t have to be a vertical drill, it’s just a bit easier to hold the bearing flat on a drilling pad (posh name for a bit of wood). The drill should follow the hole. Don’t run the reamer all the way through at first, because the fit on your chosen axle might not warrant it. Then again, you might have to run it through all the way several times to get a running clearance rather than a sliding fit.
Philip
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Re: Best tool for the job
Thanks again Philip. Now that I’m progressing from RTR conversions to etched kits, I suspect that there is a lot to learn.
John
John
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Re: Best tool for the job
From what I’ve seen so far, John, you have no need to worry...
Philip
Philip
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Re: Best tool for the job
I can't see a 'safe' way of holding that small an item to drill it.
I would use broaches from each side to enlarge the hole, trying for fit along the way.
I would use broaches from each side to enlarge the hole, trying for fit along the way.
Tim V
(Not all railways in Somerset went to Dorset)
(Not all railways in Somerset went to Dorset)
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Re: Best tool for the job
I would use a 5 sided cutting broach to take it from 2mm to reaming dia and then a 3mm reamer.
regards
Alan
regards
Alan
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Re: Best tool for the job
A toolmakers clamp would hold the bearing flat on the deck?
Philip
Philip
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Re: Best tool for the job
Philip Hall wrote:A toolmakers clamp would hold the bearing flat on the deck?
Tack soldering the small piece to a piece of scrap etch will give you something to hold on to or clamp.
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Re: Best tool for the job
Thank you all for the suggestions.
John
John
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