material options for high precision machining

[rmetzger]

We are looking for alternate material for an application where a glass filled PEI (ultem) is currently used. There are a few high precision features in the finished part so I am looking for a material that has good dimensional stable during and after machining (.0005 hole tolerances). Other important characteristics would be low water absorption, compatible epoxies for bonding, operating temps of 85+ C, and chemical resistance to common household cleaning solvents (such a wide range that I hesitate to list them all). The material cannot be electrically conductive.

Peek is being explored but I'd appreciate any suggestions.

thanks

 

[btrueblood]

PPO (Noryl) might be an option. PPSU or some of its sisters are another possibility, but I've never machined it.