Why PTFE Parts Often Exceed Tolerances After Machining?

Yes. Acrylic is one of the few plastics that can achieve a mirror finish directly through cutting. We use single-crystal diamond tools for precision machining, followed by flame polishing or diamond grinding. Surface roughness is consistently controlled within Ra0.4μm, delivering a high-gloss appearance free of scratches or defects, resembling a mirror. No secondary coating is required. For batch production, identical parameters are used to ensure consistent mirror finish quality.

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Appearance quality is a core strength. We use a three-stage control process: during machining, sharp tools with high RPM and shallow cuts prevent tool marks and roughness; between processes, all parts are film-wrapped and transferred in individual stations to avoid stacking scratches; before shipping, each piece is inspected under standard light sources against strict criteria for glossy, scratch-free, and blemish-free finishes. Batch consistency is guaranteed by fixed parameters and fixtures, not manual picking.

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We focus on volume production with a standard MOQ of 100 units. Unit pricing for plastic parts is highly volume-sensitive—raw materials are purchased in full sheets or bars, so material waste and setup time cannot be amortized below 100 units. Prices drop significantly above 100 units, with a standard lead time of 15-25 days for batch orders.

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The criteria for judgment are consistent: high gloss, high-shine surface, no scratches, and no defects. The difference lies in the process—aluminum parts rely on anodizing and polishing, while plastic parts use diamond cutting and flame polishing or mechanical polishing. When aluminum and plastic parts are mixed in the same batch, we standardize color swatches and gloss samples to avoid visual discrepancies between the two materials on the same product.

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This is typically caused by excessive cutting heat. Acrylic has low thermal conductivity, so slow feed rates, high speeds, or dull tools cause chips to melt and stick to the tool, resulting in haze and stress-induced whitening. Our approach uses monocrystalline diamond tools with high RPM and small depths of cut, along with air cooling or minimal lubrication to dissipate heat. We leave a 0.05-0.1mm finishing allowance before final machining to prevent heat accumulation on already processed surfaces.

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