[jegero]

Hi,

Does anyone have any tips on machining epoxy tooling board? Feeds and speeds, step-over and cusp height, tooling and such.... I'm trying to get a fine surface finish to make a composite mould from.

Mick

[Eldon_Joh]

is there fiber glass in it? if not, just about anything should cut it.

[slowlearner]

Do you have a brand name for this material?

[jegero]

No fiberglass in it i don't think... From a company called base, type is 978 high temp (the blue stuff)

[CNC_Tools]

Climb mill it, Watch the corners for breakout. Spiral in towards the center. I'm not familiar with the brand you are using, but I've cut a lot of Ren 450 and Redboard for foundry patterns. The redboard is extremely hard and chippy. Ren 450 is very forgiving, similar to the old Butterboard material.