Made-to-Drawing UHMWPE Parts: A Buyer's Guide to CNC Custom Fabrication (2026)

• 1. The full JSLT custom-fabrication chain (and why it matters)
• 2. Drawing file formats we accept (and what you should send)
• 3. Realistic tolerances on UHMWPE (and why they're different from steel)
• 4. Surface finishes — what each one costs
• 5. The 7-step workflow from PO to ocean container
• 6. MOQ, sample policy, and small-batch pricing
• 7. Common mistakes that delay your order (and how to avoid them)

Most overseas buyers source UHMWPE in one of three ways:

• Trader → sub-contracts to factory → sub-contracts to job shop. Cheapest quote, longest lead time, lowest accountability. Tolerance complaints disappear into a chain of finger-pointing.
• Factory makes sheet, buyer machines locally. Predictable for big shops in Germany, USA, Australia. But shipping a 4×2 m sheet across the Pacific only to cut 60% of it into chips is wasteful.
• Single-source factory does sheet AND machining (JSLT's model). One PO, one inspection, one BL, one warranty owner. The price premium vs raw sheet is typically 15-35% — less than overseas machining cost on every job we've benchmarked.

Our chain runs in one building in Dezhou:

We open and quote from virtually any 2D or 3D format, but the file you send shifts both the price and the lead time:

• STEP (.step / .stp) — preferred for parts. Native 3D solid; we can extract every dimension, tolerance, and surface needed for CAM. Quote in 4 hours.
• DWG / DXF (2D drawings). Perfectly fine for sheet cutting, hole patterns, and prismatic parts. Make sure dimensions, tolerances, and units (mm vs inch) are explicitly noted. Quote in 6-8 hours.
• IGES (.igs). Acceptable; occasional surface healing required.
• PDF or hand-sketch. Yes — we will redraw it, but expect a 24-hour quote turnaround and one round of confirmation emails. For one-off prototypes a clear photo with dimensions written on it is fine.
• SolidWorks (.sldprt) / Inventor (.ipt). Native files welcome — we run SolidWorks 2024 and Mastercam 2024.

Always include: material (UHMWPE / HDPE / PA6 / POM / PTFE / PEEK), color, quantity, surface finish if critical, and any edge-radius requirements. Missing these adds at least one email round-trip.

UHMWPE has a coefficient of thermal expansion 15-20× higher than carbon steel. A part dimensioned at 20 °C will measurably grow at 40 °C and shrink at -10 °C. We design and inspect at 23 °C ± 2 °C per ISO 291. Demanding ±0.05 mm tolerance on a 1-meter UHMWPE part is physically impossible across temperature swings — if your application sees them, design with clearance instead.

Realistic, achievable tolerances for our shop:

UHMWPE machines like soft butter — long, stringy chips. Standard finish off the saw is fuzzy and edge-burred. Our standard QC step removes burrs and breaks all sharp edges. Beyond that, customers can specify:

• As-sawn, deburred (default) — included.
• CNC-routed edge, Ra 3.2 µm — standard for visible parts; +5–10% on small jobs.
• Skim-milled face, Ra 1.6 µm — for sealing surfaces, sliding surfaces; +15–25%.
• Polished (cloth + non-abrasive paste) — cosmetic only, request only if needed; +30–50%.
• Edge chamfer 0.5×45° / radius R3 — widely requested for safety on handling parts; +5%.
• Laser-marked part number — 1-line, up to 50 mm long, included for orders >100 pcs.

Every custom job, sample or 5-ton order, follows the same 7 steps:

1. Drawing review & manufacturability (4-8 h). Engineer flags impossible tolerances, thin walls, sharp internal corners. We propose changes if needed.
2. Quote with material certificate (4-12 h). Per-piece price, MOQ if applicable, lead time, packing.
3. 30% T/T deposit + DI-PI exchange. Production starts the next morning.
4. Sheet stock allocation (1-2 days). Either pulled from finished stock (PE1000 standard) or pressed to order (specialty grades).
5. CNC machining (3-10 days). Depends on quantity and complexity.
6. QC + photo report (1 day). Per-piece dimensional check on request, photo of every batch sent before shipment.
7. Packing & shipment (2-3 days). Wooden crates, fumigated, with shipping marks; DDP or FOB Qingdao.

Total: 10-20 days ex-factory for 95% of orders. Air freight available for samples and emergency replacements.

We deliberately keep MOQ low to support engineers in their prototyping phase:

• 1 piece for full-machined custom parts — sample fee may apply if bespoke tooling needed (refundable on first production order).
• 50 kg for cut sheets and standard plates.
• 500 kg for custom-color or specialty-grade UHMWPE (UV-stabilized, antistatic, fire-retardant).

Pricing breaks: roughly 15% off at 100 pcs, 25% off at 500 pcs, 35% off at 2000 pcs vs single-piece price. Material is roughly 40% of total part cost — the rest is machining time, QC, packing, and freight.

Patterns we see weekly:

• Drawing in inch, dimensions in mm — always state units explicitly in the title block.
• No tolerance specified — we default to ISO 2768-m (medium); state H8/h8 fits if critical.
• Demanding steel-grade tolerances on a 2-meter part — see Section 3, the part will simply grow with temperature.
• Specifying "UHMWPE" without grade — PE500 / PE1000 / PE9000 are very different in price (1× / 1.4× / 2.5×) and performance.
• Forgetting color requirements — natural white is standard; black, green (FDA), or custom adds 8-15%.
• Asking for "mirror finish" — UHMWPE cannot mirror-polish; surface stays slightly waxy. We can deliver Ra 0.8 µm max.

❓ Frequently Asked Questions

Need a quote on these materials?

Email Claire — full pricing, samples, CIF delivery to your nearest port within 12 hours.