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
Custom CNC Machined Pistons Engine Parts | Precision Manufacturing
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
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
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.
Tolerance: ±0.005 mm on critical diameters
Surface finish: Ra 0.4 µm achievable
Lead time: 10–15 working days for prototypes
No MOQ — one piece or ten thousand
Material certs and full inspection report included per batch
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.
±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.
Three reasons buyers send us their drawings
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.
Where these parts are used
CNC machined pistons are not just for race cars. We supply them for:
High-performance automotive engines — forged aluminum pistons for turbo and NA builds
Motorsport and marine — lightweight pistons for endurance racing and outboard engines
Compressors and pumps — precision pistons for hydraulic and pneumatic systems
Hydraulic cylinders — steel pistons with hard-chrome or nitrided surfaces
Research and development — one-off prototype pistons for engine testing
Small engines — pistons for generators, lawn equipment, and two-stroke engines
In every case, the piston must seal, slide, and transfer force without failure. Our machining holds the geometry that makes that possible.
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.
Send your drawing
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.
