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Precision machining · Shenzhen, China · since 2018 中文站 · mxy@djsjwj.com
+86 137 2879 3168

Capabilities

What the machines and the inspection can hold

Numbers below are what we quote day to day. A tighter tolerance is possible on many features, but it is confirmed at drawing review — geometry, material and set-up decide, not a catalogue.

Processes

CNC milling

T5 three-axis centres plus four-axis VMCs for housings, brackets, heat sinks and plates. One set-up for mounting holes, pockets and sealing grooves keeps the position relationship between features under control.

  • 10 × CNC T5 centres + 4 four-axis VMCs
  • Aluminium, steel, brass, plastics
  • Vacuum and soft-jaw fixturing for thin walls

CNC turning

Slide-type and turret CNC lathes for shafts, flanges, motor housings and connectors. Concentricity between bore, face and thread is the parameter we control first.

  • Bar capacity up to Ø 46 mm
  • Chucker work up to Ø 350 mm
  • Threads, grooves, cross holes in one set-up

Automatic lathe

Cam and CNC automatic lathes for small turned parts in volume — pins, spacers, pen barrels, inserts. Lower piece price once the set-up is amortised.

  • Bar capacity Ø 3–20 mm
  • Ideal for 5,000+ piece runs
  • Short cycle times for simple geometry

Tolerance guide

Typical values for production, and what is achievable after review. Both assume a stable set-up and a drawing that does not stack tolerances across operations.

FeatureTypicalAchievable on review
Milled dimensions±0.02 mm±0.01 mm on review
Turned diameters±0.02 mm±0.005 mm on review
Hole position±0.03 mm±0.01 mm
Surface roughnessRa 1.6Ra 0.4 by grinding/lapping
Concentricity0.02 mm0.005 mm with one set-up
Flatness0.02 mm / 100 mm0.01 mm after stress relief

Materials we machine

GroupGradesFinishing
Aluminium6061-T6, 6063, 6082, 7075, 5052, 1050/1070Anodising, hard anodising, sandblasting
Stainless steel303, 304, 316L, 17-4PHPassivation, brushing, electropolishing
Carbon steel45#, 40Cr, 4140, SPCCBlack oxide, zinc/nickel plating, heat treatment
Copper and brassC1100, H59, H62, beryllium copperNickel plating, tinning, passivation
TitaniumTC4 (Ti-6Al-4V), TA2Anodising, passivation; slower cutting, quoted accordingly
PlasticsPOM, PC, PEEK, ABS, acrylicMachined only; no solvent polishing in-house

Material certificates are available for the grades we purchase. If a grade is not listed, ask — supply is quoted per order.

Finishing

  • Anodising (clear, black, colour) — type II and hard anodising
  • Passivation and electropolishing for stainless
  • Zinc, nickel and tin plating for steel and copper
  • Black oxide, sandblasting, bead blasting
  • Laser marking and silkscreen through partners

Finishing is carried out by qualified partners we manage. Lead time and colour batches are confirmed with the quote, because anodising colour matching is the most common cause of a delayed shipment.

Equipment

GroupTypeNote
CNC machining centres10 × T5 three-axis + 4 four-axisSmall to medium parts; envelope confirmed at drawing review
CNC lathes16 slide-type + 5 turret lathesBar work and chucking work
Automatic lathes16 × model 1525 cam-typeSmall turned parts in volume
Inspection2D vision, CCD sorter, salt spray, hardness, RoHSReports issued per lot on request
SecondaryTapping, deburring, polishing, assemblySub-contracted finishing managed by us

Inspection

First article inspection

Full dimensional report on the first part, with the critical characteristics marked on the drawing.

In-process checks

Operator checks at fixed intervals; critical dimensions measured with the same instrument used for the FAIR.

Final inspection

2D vision measurement, CCD optical sorting, salt spray, hardness and RoHS testing, plus gauges, depending on the feature class.

Traceability

Material certificate, batch number and inspection records retained so a repeat order matches the first.

Send a drawing, get a price within 24 hours

STEP, IGES, DWG, PDF or a dimensioned sketch — plus material, quantity and finishing. We reply with a price and any questions in one message.