Polycarbonate Parts We Machine
Ten PC part families from sight glasses to impact shields.
Ten Part Families We Run Repeatedly
| Part family | Common materials | Key tolerances | Typical finish | Typical order |
|---|---|---|---|---|
| Sight glasses and windows | PC transparent | Flatness 0.05 mm, vapor polished | Vapor polish | 100 to 1,000 pcs |
| Machine guards | PC sheet | +/-0.5 mm cut, edge polished | Polished edges | 50 to 500 pcs |
| Light pipe bases | PC transparent | +/-0.05 mm optical seats | Polished faces | 500 to 5,000 pcs |
| Insulating structural brackets | PC natural | +/-0.02 mm locating features | As-machined | 200 to 2,000 pcs |
| Equipment windows with gasket seats | PC transparent | Gasket groove +/-0.05 mm | Polished | 100 to 1,000 pcs |
| Test chamber covers | PC clear | +/-0.1 mm general, polished | Polished | 50 to 500 pcs |
| Flow observation fittings | PC + 316L inserts | +/-0.02 mm ports, leak tested | As-machined | 200 to 2,000 pcs |
| Protective lens covers | PC optical grade | Scratch-safe packing, polish | Vapor polish | 500 to 5,000 pcs |
| Electrical barrier plates | PC natural | +/-0.05 mm | As-machined | 500 to 5,000 pcs |
| Fixture viewports | PC clear | +/-0.05 mm, polished bore | Polished | 10 to 100 pcs |
Material detail: PC machining. Impact alternative: ABS.
Worked examples with full measurement data: case studies.
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Frequently Asked Questions
What tolerance can you hold on plastic parts?
On stable geometries we hold +/-0.005 mm on polymer parts, matching our metal capability; minus-material behavior like moisture uptake is planned into the process. Standard tolerance is +/-0.05 mm unless the drawing calls tighter.
Do plastic parts need annealing?
Stress relief (hot oil or air annealing) is planned per material and geometry; PTFE nearly always gets an anneal before finish passes, and PC benefits on stress-sensitive features.
Can you source certified plastic stock?
Yes, stocked rods and sheets come with mill certificates; medical-grade and ESD grades are sourced per drawing callout.
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