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MasterCAM tapered bores

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What toolpath would you guys recommend for machining a tapered wall bore (MasterCAM 2022 43/4 axis)? I have a bore roughly 5in dia at the large end on the mill and 1 in deep. the taper is 30 degrees. I know it can be done as simply as clicking "tapered walls" for a 2D path, but am looking to see if there is a better method using one of the 3D paths.


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When you ask if there's a better method what may I ask are you looking to do more easily?

Are you having issues with how your currently doing it or just looking for other peoples input?

There's a 100 different ways of doing things and that's the great thing about this forum is people will share those ideas and  you've gotten some good ones so far 😃


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  • 3 weeks later...

Thanks for the help! Ended up using an OptiRough toolpath to rough it out and finished with a 2d contour (tapered walls). I was just curious if anyone had a go-to method that was more efficient. I think gms1's method of a threadmilling toolpath is interesting. I will likely play with that in the future. The parts turned out perfect and it was a short run of non production parts. The customer was very happy with the part. Just need management to get that 5-Axis.

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