TC22 from BT40 to CT40

[Marty_Escarcega]

So this one but with 5/8" threads:

[cooperjm]

Yes. Dimensions C will be shorter for the CT tool holder.

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[Marty_Escarcega]

Yes. Dimensions C will be shorter for the CT tool holder.

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This is the closest I found, overall length is a bit shorter as well.

Thank you!

[Marty_Escarcega]

I'll wait until you get home. I sent an email to EMI as well.
Don't want to mess this up.
Thank you!
Marty

[Marty_Escarcega]

Here is what Aaron at EMI said about swapping from BT40 to CT40:

"There is way more involved in that. We have had our serviceman do a swap once and between parts and labor (you need a service man very familiar with this tool changer setup) it was well over a $6000.00 event and this was in 2010. That is not a project we would recommend taking on. In fact, you can buy a used Bridgeport machining center ready for CT tooling for the cost of what it would take to change from BT to CT."

[Marty_Escarcega]

Yes. Dimensions C will be shorter for the CT tool holder.

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Any news on the dimensions Cooperjm and the statement from EMI? I can't see why it wouldn't work other than the threads for the CT40 tool holder the dimensions are otherwise the same?
Thanks
Marty

[cooperjm]

Marty

I just spent 30 minutes looking for those to pull studs that I have. I cannot locate them at this time. I do apologize.

If you go look up the taper length 4bt 40 compared to a cat 40 that different should be similar to the difference in the pool stud length.


I know Aaron and Mark a EMI. I believe that they have experience with this that I do not. I do know that I put a cat 40 with a short stud and my spindle. I cannot guarantee what the drawbar pressure was though.

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[Marty_Escarcega]

Marty

I just spent 30 minutes looking for those to pull studs that I have. I cannot locate them at this time. I do apologize.

If you go look up the taper length 4bt 40 compared to a cat 40 that different should be similar to the difference in the pool stud length.


I know Aaron and Mark a EMI. I believe that they have experience with this that I do not. I do know that I put a cat 40 with a short stud and my spindle. I cannot guarantee what the drawbar pressure was though.

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I'm confused. So you did do this conversion or not?
Is the pull stud the same as the BT40 with the exception that it has the 5/8"-11 thread?

[cooperjm]

Apologize for the confusion. I never said I did the conversion. I had a cat 40 tool that I used in My BT machine. I change that to out by hand. I do not have the tool anymore but I kept the pull studs in case I ever needed them again.

I'm not sure what else you would have to change out to do the conversion. I did see a forum post that talked about doing the conversion some years ago. I know the tool change height needs to be adjusted when you switch to different tool holders.

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