Newbie- Machining MOLD MAX HH

[mxer]

Anyone had much experience with this type of material? I've been working with it for the last few days. Have also been working with a new tool in roughing of these parts. VERY, impressive.

[spock]

been machining it for years.....turns fine with carbide, gotta watch high speed drills...tapping just sucks....but it makes good mold components that can last for years and years.

[mxer]

Yes drilling with high speed and tapping really sucks. Had an 7/16" x 8" deep hole to put in. Like the material wants to shrink around the tool as it heats up with the high speed. Went to a carbide drill with not one single problem. Tapping is out of the question so all needed threads were thread milled.

[Chasswen]

high speed steel drill sharpen just alittle off center this will make it cut a tad larger.
also add neg relieve to the cutting edge this will prevent it from wanting to pull. due to the mat'l being gummy.