OpeningYour piston drawing is the only spec we need. We machine it to your exact geometry, tolerances, and surface finish. Every part is verified before shipment — no exceptions.We run a 20-year-old f
Your piston drawing is the only spec we need. We machine it to your exact geometry, tolerances, and surface finish. Every part is verified before shipment — no exceptions.
We run a 20-year-old factory in Dongguan, China, with dedicated CNC lines for engine components. We do not cast or forge pistons. We start from bar stock or near-net blanks and finish by CNC turning, milling, and grinding.
If you need a piston that holds compression, resists heat, and fits your bore, send the drawing. We will quote it firm within 12 hours.
| Parameter | Value |
|---|---|
| Materials | Aluminum 4032, 2618, 6061, 7075; Steel 4140, 4340; Stainless 304, 316; Titanium Grade 5 |
| Machines | 5-axis CNC mills, CNC lathes with live tooling, cylindrical grinders, wire EDM |
| Process | Turning, milling, grinding, honing, drilling, tapping, deburring |
| Tolerance | ±0.005 mm on bore and pin bore; ±0.01 mm on general dimensions |
| Surface finish | Ra 0.4 µm on sealing surfaces; Ra 0.8 µm standard |
| Roundness | ≤0.003 mm |
| Cylindricity | ≤0.005 mm |
| Batch size | 1 to 100,000+ pieces |
| Inspection | CMM, air gauge, surface profilometer, hardness tester |
| Lead time | 10–15 days prototype; 20–25 days production |
| MOQ | No MOQ |
| Certifications | ISO 9001:2015, material certificates, full dimensional report |
We hold tight tolerances because pistons live in a hostile environment. Your design decides the material and coating. We handle the machining and verification.
1. Batch-traceable quality Every batch gets a unique job number. We record material heat number, machine operator, tool offsets, and inspection results. If a part fails in the field, we trace it back to the exact shift and tool. No guesswork.
2. Inspection report per batch You receive a full dimensional report with each shipment. We measure every critical feature — pin bore diameter, ring groove width, crown thickness, skirt profile. We use CMM and air gauges, not calipers. The report is signed by our QC lead and sent with the parts.
3. One factory for CNC + stamping + springs + heat sinks We run four production lines under one roof. If your assembly needs a stamped bracket, a spring retainer, or a heat sink for the electronics nearby, we make it. You deal with one supplier, one shipping point, one invoice. Fewer headaches, faster turnaround.
CNC machined pistons are not just for race cars. We supply them for:
In every case, the piston must seal, slide, and transfer force without failure. Our machining holds the geometry that makes that possible.
Looking for a different part? We also machine Custom CNC Machined Furniture Brackets | Precision Manufacturing, No MOQ in the same Dongguan factory.
Q: Do you really have no MOQ? A: Yes. We machine one prototype or a full production run. No minimum order. Prototype pricing is slightly higher per piece, but the setup fee is the same. We keep it simple.
Q: How do you guarantee tolerance and quality? A: We inspect 100% of critical dimensions on every part. For production batches, we use SPC sampling plus full CMM inspection on first articles. The inspection report is included with your shipment. If a part is out of spec, we replace it at no cost.
Q: What is your lead time for custom CNC machining? A: Prototypes ship in 10–15 working days after drawing approval. Production runs take 20–25 working days. Rush service is available for an extra fee — we can hold 7 days for simple parts.
Q: Can you provide material certificates? A: Yes. We supply mill certificates for raw material with every batch. For aerospace or automotive requirements, we also provide traceability to heat number and chemical composition.
Stop waiting for quotes that take a week. Send your piston drawing today and get a firm price in 12 hours.
Email: sc@bquq.com WhatsApp: +86 13713157787
We reply within one business hour. Include your material, quantity, and target tolerance. We handle the rest — precision manufacturing, custom CNC machining, made in China, no MOQ. Your parts, verified, on your desk.
| Parameter | Capability |
|---|---|
| Materials | AL6061/7075, SUS303/304/316, 45# steel, T2 copper, H59 brass, POM, PEEK, nylon |
| Tolerance | ±0.005mm standard, ±0.003mm on request |
| Machines | 3/4/5-axis CNC, turn-mill, Swiss lathe |
| Surface | Anodizing, nickel, zinc, passivation, sandblast, polish |
| Size Range | Max 400 x 300 x 200 mm |
| Prototype | 72 hours, no MOQ on samples |
| Inspection | Full report per batch, CMM data on request |
