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Sunmax Casting India Private LimitedIATF CERTIFIED
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Secondary Operations · Thirumudivakkam, Chennai

CNC Machining of Aluminium Castings

Machining castings in the same plant they are cast in keeps datums, fixtures and responsibility in one place. We machine critical faces, bores and threads so your parts arrive ready to assemble.

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Operations
Drilling · tapping · facing · boring
Drilling range
Ø1.5 – Ø32 mm
Machine list
[INSERT CNC MACHINES]
Inspection
In-process gauging + CMM

Why machine castings where they are cast

A die casting is rarely finished as it leaves the die: sealing faces need flatness, bearing bores need size and position, and threads must be cut. When the foundry also machines, the casting datums, fixtures and the machining programme are designed together — so tolerances are held more reliably and problems are traced to their cause.

We machine castings from our own die casting cells. [INSERT WHETHER CUSTOMER-SUPPLIED CASTINGS ARE ACCEPTED].

Process

Machining workflow

How a cast part moves through machining:

  1. Step 01

    Fixture design

    Fixtures locate on cast datums agreed during die design.

  2. Step 02

    First-off approval

    The first machined part is fully measured before batch release.

  3. Step 03

    Drilling and tapping

    Multi-spindle drilling and pneumatic index tables for high-cadence hole preparation and tapping.

  4. Step 04

    Facing and boring

    [INSERT CNC FACING / BORING CAPABILITY]

  5. Step 05

    Deburr and wash

    Machining burrs and chips are removed before inspection.

  6. Step 06

    Gauging

    Go/no-go and variable gauges on critical features; periodic CMM audits.

Capabilities

Machining capabilities

Replace placeholders with the current machine list.

Machining capabilities
CNC machining centres[INSERT MAKE / MODEL / AXES / TABLE SIZE]
Multi-spindle drillingØ1.5 mm – Ø32 mm
Tapping[INSERT THREAD RANGE]
Achievable tolerance[INSERT TYPICAL TOLERANCE]
MeasurementGranite surface table (Grade 0), height gauges, CMM

Materials machined

We machine our own aluminium die castings in all the alloys we cast.

ADC12 / A380 / AlSi9Cu3
Free-machining die casting alloys
AlSi10Mg / LM24
Machined with appropriate tooling and coolant
Compare alloy properties

Typical machined features

Features we commonly machine on cast parts:

  • Sealing and mounting faces
  • Bearing and shaft bores
  • Threaded holes and inserts
  • Dowel and locating holes
  • O-ring grooves
Industries

Industries we supply with cnc machining

Quality

Machining quality checks

See our full quality assurance process
  • First-article inspection report
  • In-process gauge checks at a defined frequency
  • Thread gauging on tapped holes
  • Final visual and dimensional checks before packing

FAQ

CNC Machining — frequently asked questions

Do you machine castings from other foundries?

[INSERT ANSWER — confirm whether customer-supplied castings are accepted].

Can you supply parts with threaded inserts?

[INSERT ANSWER — confirm insert installation capability].

How are machined dimensions verified?

With in-process gauges at a defined frequency and periodic CMM measurement, recorded for traceability.

Related capabilities

Request for Quotation

Get a quote for cnc machining

Share your 3D model or drawing, alloy and annual quantity. Our engineering team reviews every enquiry for manufacturability before quoting.

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