acetal surface finish?

[aquanub]

hey guys

I'm looking to achieve a nice uniform surface finish on some acetal.

Is it safe to use a flycutter to achieve this finish? I'm only used to flycutting at much slower RPMs on industrial mills... not sure if 8000 RPM (lowest setting on the DW618) would do it...

Would a surfacing bit suffice? I have a whiteside surfacing bit I used for the wasteboard, but I'm not 100% convinced it will leave a finish like a flycutter would.

I've tried sanding / polishing the surface and I am lead to believe that that a machine finish is the best bet for acetal.

thanks!

[Bruce]

What does this finish look like that you are trying to achieve?

[aquanub]

Oct 24, 2019 4:18:39 GMT Bruce said:

What does this finish look like that you are trying to achieve?

raw stock surface finish looks like this (give or take): 4.imimg.com/data4/YE/SB/MY-719080/polyacetal-delrin-sheets-500x500.jpg

if i can get it looking like this: mycarboard.com/wp-content/uploads/2018/06/1529969825_849_AwesomeAmazingGreat-Mazda-Miata-MX-5-Delrin-CNC-Machined-Door-Bushings-1990-2018-Pair-20182018-20192019.jpg

I know I cant get it perfectly smooth, but a flycut finish would be acceptable. I also understand that I am at the mercy of the tram on my machine.

Not sure if there is a flycutter out there that is capable of spinning at the PR lowest RPM (8000)

[Derek the Admin]

I would try a surfacing bit on it personally.