CNC Machining of ABS
ABS is the workhorse plastic for functional prototypes, housings and shop fixtures: inexpensive, easy to bond and quick to machine into a real, testable part.
Why it is hard to machine
ABS has a low melting point and softens quickly, so the main risk is heat: friction at the edge melts and smears the surface instead of cutting it. It also marks easily under clamping and burrs on sharp exits.
Process controls that matter
Melting and smearing
Low melt point means heat builds fast. Sharp geometry, high rake and controlled feeds cut rather than rub.
Clamping marks
ABS dents under pressure. Soft jaws and low-force workholding keep cosmetic surfaces clean.
Burrs on exits
Edges fray where the tool leaves. Controlled speeds and light finishing leave defined edges.
Tolerances, inspection and documentation
Typical applications
Functional prototypes, enclosures and covers, jigs and fixtures, panels and non-structural components.