Drawing and Fixture Review
The part drawing is checked against the casting, then fixtures and the machining sequence are set before the first piece is cut.
On-Site Machining · Coimbatore
CNC
Machine Shop
Over 40 CNC machines sit in the same Coimbatore plant that pours the castings, so parts can leave Arasur fully machined, inspected and ready to fit.
Capability Overview
Why Machine Castings
at the Foundry?
Most castings leave a foundry raw and travel somewhere else to be machined. Ours do not have to. The machine shop opened in 2011 on the same site as the foundry at Arasur, Coimbatore, and now runs more than 40 CNC machines.
That matters for two practical reasons. Handling and freight between two sites disappear. And if a dimension drifts, the people who poured the casting and the people who machined it are in the same building, so the cause gets found faster.
The shop covers milling, turning, boring, gear shaping and dynamic balancing, with two Brown and Sharpe coordinate measuring machines for inspection. Fabrication, sub-assembly, load testing and primer painting sit alongside it.
Machine shop capacity is being expanded, with further machining centres due from August 2026.
Machine List
What Machines Are
in the Shop?
Every machine installed at the Coimbatore plant, with its working envelope. Send a drawing and our engineering team will confirm the machining route for your part.
| Machine | Count | Working Envelope |
|---|---|---|
| Vertical machining centres | 20 | 1,000 × 500 × 500 mm (9), 1,200 × 550 × 550 mm (9), 1,600 × 750 × 800 mm (2) — all with 4th axis and through-coolant spindle |
| HMC — HAAS EC-400 | 1 | 600 × 600 × 500 mm, 400 × 400 mm pallet, 60-tool changer |
| HMC — MAG Specht 500X, 5th axis | 1 | 800 × 800 × 750 mm, 500 × 500 mm pallet, 108-tool changer |
| HMC — Starrag IWK 5000 with probing | 1 | 900 × 900 × 800 mm, 630 × 500 mm pallet, 60-tool changer |
| HMC — Doosan DHM 800 with probing | 1 | 1,200 × 1,200 × 900 mm, 800 × 800 mm pallet, 90-tool changer |
| Vertical turret lathes | 5 | Cutting Ø850 mm with 1,000 mm swing (2), cutting Ø700 mm with 800 mm swing (3) |
| Turning centres | 13 | Cutting Ø350 mm with 450 mm swing (7), cutting Ø250 mm with 350 mm swing (6) |
| Vertical turn mill | 1 | 1,500 mm table, cutting Ø1,750 mm, 1,100 mm height |
| Gear shaping — Fellows, Vermont USA | 1 | Up to Ø500 mm and 90 mm height |
| Dynamic balancing | 2 | Horizontal and vertical, up to Ø500 mm and 300 mm length, accuracy 1 gram |
| CMM — Brown & Sharpe, touch probe | 1 | 700 × 1,000 × 700 mm |
| CMM — Brown & Sharpe, scanning probe | 1 | 1,500 × 1,200 × 1,000 mm, with gear profile testing |
| Sheet perforation and forming | 2 | 1,000 mm working width, 2 mm thickness |
| Hydraulic press | 1 | 2,000 tonne, used for load testing and assembly work |
How It Works
How Does a Casting
Move Through Machining?
Four stages, from drawing review to a part that is packed and ready to fit.
First Article
The first piece is machined and measured on the CMM. Dimensions are signed off against the drawing before the batch is released.
Production Machining
The batch runs across the VMC, HMC, turning centre and VTL lines, with in-process checks at set frequencies.
Special Processes, Assembly and Dispatch
Gear shaping, dynamic balancing, fabrication, sub-assembly, load testing and primer painting are done as the part needs, followed by final inspection and packing.
Inside the Plant
Photographs from
the Machine Shop
Real photographs of the machining, metrology and assembly areas at Arasur, Coimbatore.
Common Questions
Machine Shop
Questions Buyers Ask
Does Technocast machine its own castings?
Yes. The machine shop opened in 2011 on the same site as the foundry at Arasur, Coimbatore, and now runs more than 40 CNC machines. Castings can be supplied fully machined rather than as-cast.
How many CNC machines are in the machine shop?
Twenty vertical machining centres, four horizontal machining centres, five vertical turret lathes, thirteen turning centres and one vertical turn mill, plus gear shaping and dynamic balancing machines.
What is the largest part you can machine?
The vertical turn mill takes a 1,500 mm table with 1,750 mm cutting diameter and 1,100 mm working height. The largest horizontal machining centre gives 1,200 x 1,200 x 900 mm travels on an 800 x 800 mm pallet.
Do your machining centres have 4th and 5th axis?
All twenty vertical machining centres have a 4th axis and a through-coolant spindle. The MAG Specht 500X is a five-axis machine, and the Starrag IWK 5000 and Doosan DHM 800 are fitted with probing.
Can you cut gears?
Yes. A Fellows gear shaping machine from Vermont, USA cuts up to 500 mm diameter and 90 mm height.
Do you offer dynamic balancing?
Yes, on horizontal and vertical machines, for components up to 500 mm diameter and 300 mm length, balanced to an accuracy of 1 gram.
How are machined dimensions checked?
On two Brown and Sharpe coordinate measuring machines. One covers 700 x 1,000 x 700 mm with a touch probe; the other covers 1,500 x 1,200 x 1,000 mm with a scanning probe and gear profile testing.
Do you do fabrication and sheet work?
Yes. The fabrication shop covers TIG, MIG and arc welding, and two machines handle sheet perforation and forming up to 1,000 mm wide and 2 mm thick.
Can you supply assembled and tested parts?
Yes. Assembly runs at low and medium batch volumes and can include steel castings, rolled steel, forgings, brass, PTFE, stainless steel and rubber parts. Load testing is done to the customer requirement, and a 2,000 tonne hydraulic press is available.
Do you offer painting and coating?
Primer painting of machined castings is done in-house. ED coating, manganese phosphating, powder coating, zinc coating and galvanising are handled through approved outside processors.
Where is your CNC machine shop in Tamil Nadu?
At 127/3B, Sangothipalayam Road, Arasur, Coimbatore, Tamil Nadu 641407, India, on the same site as the foundry. Plant visits and audits can be arranged through the contact page.
Send Us a Drawing
Want Castings
Ready to Fit?
Send the machined drawing with your annual quantity. Our team in Coimbatore will confirm the machining route, the fixtures needed and the inspection plan.
