| Process | Equipment | Typical tolerance | Size / range | Best for |
|---|
| CNC turning | CNC lathes with live tooling | ±0.01 mm standard; ±0.005 mm precision | Dia 1–200 mm | Shafts, bushings, fittings |
| CNC milling | 3/4/5-axis vertical machining centers | ±0.01 mm standard; ±0.005 mm precision | Up to 800 × 500 × 400 mm | Plates, housings, brackets |
| Swiss-type turning | Sliding-headstock lathes with guide bushing | ±0.005–0.01 mm | Dia 1–32 mm, L/D up to 20:1 | Long, thin, complex small parts |
| Metal stamping | Progressive dies and single-stroke presses | ±0.05 mm typical; tighter on request | Strip 0.1–4 mm thick | Terminals, contacts, clips, brackets |
| Spring forming | CNC coilers, torsion/extension formers | Per DIN/ISO spring classes | Wire 0.1–8 mm | Compression, extension, torsion springs |
| Heat sinks | Extrusion, CNC machining, skiving, assembly | Flatness to 0.05 mm; fin control per drawing | Custom profiles, up to 1 m | Electronics, LED, IGBT, power supplies |
| Collets and chucks | CNC grinding, heat treatment, lapping | Runout ≤0.005 mm | Auto-lathe and Swiss types | Automatic lathe workholding |
| Group | Grades | Common use |
|---|
| Aluminum | 6061, 6063, 7075, 5052, 6082 | Housings, heat sinks, brackets, prototypes |
| Stainless steel | 303, 304, 316/316L, 17-4PH | Medical, food, marine, precision parts |
| Carbon & alloy steel | 1045, 4140, 1215, spring steels (65Mn, SK5) | Shafts, springs, structural parts |
| Copper alloys | C11000 copper, C26000 brass, C5210 phosphor bronze, beryllium copper | Contacts, terminals, conductive parts |
| Titanium | Grade 2, Grade 5 (Ti-6Al-4V) | Aerospace, medical, high-strength parts |
| Engineering plastics | POM (Delrin), PA (Nylon), PEEK, PTFE, PMMA (Acrylic) | Insulators, wear parts, prototypes |
| Item | Capability |
|---|
| CNC general tolerance | ±0.05 mm (ISO 2768-mK equivalent) |
| CNC precision tolerance | ±0.01 mm, down to ±0.005 mm on well-supported features |
| Stamping tolerance | ±0.05 mm typical; ±0.02 mm on fine-blanked parts |
| Surface roughness | Ra 0.4–3.2 µm as machined; polished/tumbled on request |
| Anodizing | Type II and Type III (hard), clear or colored |
| Plating | Zinc, nickel, tin, gold (selective), silver (contacts) |
| Other finishes | Bead blasting, passivation, powder coating, laser marking |
| Item | Detail |
|---|
| Certification | ISO 9001:2015 (certificate number verifiable on request) |
| Inspection equipment | CMM, optical comparators, hardness testers, profile projector, surface roughness tester, calipers/micrometers |
| First article | FAI report per AS9102 format on request |
| Material traceability | Material test reports (MTR) available for production lots |
| Batch records | Inspection data issued with each production batch |
| Documents | PPAP packages for automotive/electronics customers on request |
| Item | Detail |
|---|
| Prototypes | From 1 piece; CNC parts commonly 3–7 days |
| Small batches | 1–500 pcs flexible, no rigid MOQ on CNC machined parts |
| Mass production | Stamping and springs from hundreds to millions of pieces |
| Lead time | Prototype 3–7 days; mass production 15–30 days depending on process and quantity |
| Quoting | Within 12 working hours on receipt of drawings/samples |
| Shipping | DHL/FedEx/UPS express, air freight, sea freight; EXW, FOB, DDP |
Get a quote or a full capability sheet
Send your drawings (STEP, IGES, DWG, DXF or PDF) or a physical sample. Our engineering team returns process advice, DFM notes and a quote within 12 working hours.
Email: sc@bquq.com | WhatsApp/Phone: +86 137 1315 7787
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