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Will this work?

K

Kestrel

New Member
I was looking for more tool holders for my quick change tool post and found some on marketplace. I have accusize 250-111 tool post but didn't realize that 250-201 has larger dove tail and do not fit with my tool post. If I place copper shim, like pictured, will it cause and issues?
 

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I thought the 201 series were for a BXA toolpost which is a fair bit larger than a 100 series AXA. I can't imagine that that copper strip is enough to deal with the difference in size.
 
David said:
I thought the 201 series were for a BXA toolpost which is a fair bit larger than a 100 series AXA. I can't imagine that that copper strip is enough to deal with the difference in size.
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It does seem to fit securely but I don't know if it's going to be as repeatable or cause issues when tool pressure is included.
 
Kestrel said:
It does seem to fit securely but I don't know if it's going to be as repeatable or cause issues when tool pressure is included.
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I'm honestly shocked as a BXA post is .5" larger than an AXA. I had no idea the dovetails were so similar in size.
 
There is a fair gap between the two faces but the dovetail does engage well
 

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The other consideration is tool height. An AXA holder is typically designed for 12mm or 1/2" tooling max whereas a BXA I think is 1.125" max so check if you can get your tooling on centre without crazy amounts of shims.
 
David said:
The other consideration is tool height. An AXA holder is typically designed for 12mm or 1/2" tooling max whereas a BXA I think is 1.125" max so check if you can get your tooling on centre without crazy amounts of shims.
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Thanks for that consideration. It does seem to work for tool hight, but I'm second guessing if it's going to be able to deal with cutting forces. I think I will just play it on the safe side and eat the $$.
 
I bought a bunch of tool holders from some reseller/importer of cheap Asian made tools and in the bunch of holders was one that was machined oversize on the dovetail and would lock on my tool post. I glued in an aluminum shim and have used it ever since.
 
DPittman said:
I bought a bunch of tool holders from some reseller/importer of cheap Asian made tools and in the bunch of holders was one that was machined oversize on the dovetail and would lock on my tool post. I glued in an aluminum shim and have used it ever since.
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That gives me some confidence to just go with it! lol
 
DPittman said:
I bought a bunch of tool holders from some reseller/importer of cheap Asian made tools and in the bunch of holders was one that was machined oversize on the dovetail and would lock on my tool post. I glued in an aluminum shim and have used it ever since.
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I made some and screwed up my dimensions. I further cut down the toolpost side and then riveted on some 3/16" ish shims. Problem solved.
 
If the heights are similar enough that you can get tools on center, then I could see a shim than small being a reasonable solution. I would use steel though, not copper, and I would either rough up both surfaces and bond with a quality epoxy, or lightly tig tack it in a few spots to stay put. I would also put it on the rear dovetail, as that is the one not directly responsible for repeatability, just holding.

It may just be my eyes, but it looks like there is a gap in the flat bottom of the female in your second pic?
 
Shouldnt be any concern about using shims. It's no different than the gibs on your lathe crossslide.
 
Dan Dubeau said:
If the heights are similar enough that you can get tools on center, then I could see a shim than small being a reasonable solution. I would use steel though, not copper, and I would either rough up both surfaces and bond with a quality epoxy, or lightly tig tack it in a few spots to stay put. I would also put it on the rear dovetail, as that is the one not directly responsible for repeatability, just holding.

It may just be my eyes, but it looks like there is a gap in the flat bottom of the female in your second pic?
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There is a gap its about 1.5mm. The correct tool holder has about a 1mm gap
 
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