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Old 07-17-2018, 03:39 PM
kjoiner kjoiner is offline
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Join Date: Sep 2016
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Default Fastest way to make holes

I'm going to be cutting some parts from 3/4" thick UHMW. There are a total of 90 holes that need to be cut. The holes are .261 so I'll be using a 1/4" cutter to make them. It looks like I have two options -1. Use the pocket toolpath or 2. Use the profile path and cut inside the circles.

It seems like using the profile patch with a spiral is a lot faster ( 9 minutes) vs. doing them with the pocket (19 min). I have a lot to lean about being the most efficient.

For cabinet makers and other. who drill a lot of holes, what do you recommend?


Kyle Joiner
Duluth, GA
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Old 07-17-2018, 05:07 PM
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Gary Campbell Gary Campbell is offline
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Yes the spiral down will be much faster. I would use a 3/16 bit, andf it may even go faster yet, but you will have to play with the feeds and speeds
Gary Campbell
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Old 07-18-2018, 04:21 PM
CAMhead Legend
Join Date: Jul 2017
Posts: 102

I am not sure what kind of tolerance you need to hold but you can go on Mcmaster and get a 6.5mm 2 flute end mill and plunge cut. (.261 is 6.629mm). Sounds like it is a tight clearance for a 1/4" MS.
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Old 07-18-2018, 06:49 PM
CosmosK CosmosK is offline
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drill bits are the fastest way to make holes. Any reason not to use one? Maybe you need a flat bottom or can't break through I suppose.
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Old 07-20-2018, 01:30 PM
The real JP The real JP is offline
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yeah, drill bit

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Old 08-08-2018, 10:06 AM
guitarwes guitarwes is offline
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Join Date: Jul 2018
Location: SE Ga
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Use a .25 1-flute spiral Oflute for this with a one pass spiral profile toolpath at 200ipm at 18k rpm. I cut a good bit of UHMW and have found this works well on my machine with a 3hp spindle.
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