[Newbie] Cutting A Nylon Part With Many Different Holes

[mun]

Hi

Could a nylon part with many differently sized holes be easily made with CNC? Something like below:



The size differences are about just 0.02mm. Does the drill bit need to be changed to accommodate the different sizes?

Thanks

 

[Bob Korves]

To make different sized holes you should use an end mill rather than a drill, and orbit the tool for the different sizes. I am not a CNC guy, so cannot really comment on the difficulty of the project. It looks pretty straightforward, but a lot of details are left out, like what material and thickness it is made from. Tolerances as well...

Edit: Welcome to Hobby-Machinist!

 

[planeflyer21]

Easily made, yes. As Bob said, you should use an endmill and interpolate the holes within your programming.

 

[derf]

It can be done, but good luck holding the size. Nylon is not known for getting precision tolerances.

 

[kd4gij]

Is this a drill index. There may be better plastics than nylon out there..

 

[Groundhog]

0.02mm = less than 8/10,000 of an inch. That kind of accuracy might be pushing a some (bench-top or well used) CNC mills. Tool wear and tool run-out will have to be carefully accounted for. The end mill would have to be around 0.10" for the smaller holes which in turn might require a high speed spindle - depending on material (and like someone said before - nylon probably will not hold those dimensions).

Not hard to do, but there are a few things one is not normally concerned about. I make aluminum emblems/badges and regularly hold tolerances of 0.005" using end mills as small as 0.015" using a modified bench-top CNC mill.