- Plastics generally have a high thermal expansion coefficient, up to a factor
twenty higher than that of metals. The dimensions of machined parts should
therefore be measured after allowing the parts to cool down.
- Internal stresses are built up in the plastic part during machining.
Annealing may therefore be considered in critical cases, where
environmental stress cracking can be expected. This can be critical for
- Skin contact and inhalation of dust must be avoided, as dust may cause
irritation. Please check the material safety data sheets for required
There are a number of machining methods:
Drilling and reaming, Threading and tapping
Punching, blanking, and die cutting
Sanding and grinding
Polishing and buffing