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Author Topic: Mach4 Lathe: Cutting a 7/24 taper for BT30  (Read 399 times)

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Mach4 Lathe: Cutting a 7/24 taper for BT30
« on: August 28, 2018, 08:43:54 AM »
I've been reading this thread for some info and ended up with the initial settings you see in the attached image. I haven't tried it yet. Does this look OK to you?

https://www.practicalmachinist.com/vb/general/what-angle-bt40-taper-272649/

Thanks,
Suat

Re: Mach4 Lathe: Cutting a 7/24 taper for BT30
« Reply #1 on: August 28, 2018, 09:15:22 AM »
OK I'm a little confused on the taper angle. Some say (half angle) 8.2971 and others say 8.1301 .

Offline RICH

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Re: Mach4 Lathe: Cutting a 7/24 taper for BT30
« Reply #2 on: August 29, 2018, 09:41:26 AM »
See the attached pic's for dimensions of a BT30 plug gage and spindle.
There is a tolerance on the basic 1.250" dimension. Doubt that you can hold it on your lathe.
Frankly should make a gage to check and refine the taper post turning. BTW, usually they are ground.

Don't use Mach4 lathe but will remark to make sure the code generated is for the mode your using
ie; diameter or radius.

Have fun,
RICH