Technocast Foundry casts swing frames, boom and link brackets, track components, counterweights and hydraulic housings for construction and earthmoving machinery. Ductile iron, grey iron and steel up to 1,500 kg, welded, assembled and load tested at Arasur, Coimbatore, Tamil Nadu, India.
Construction and Earthmoving
Heavy machine and implement castings, welded and assembled on the same site.
Construction and earthmoving is about a tenth of what we pour. These are the working parts of the machine rather than the driveline: swing frames and turntable parts, boom and link brackets, track and roller components, counterweights, hydraulic manifolds and housings. A 300 kg earthmoving frame is in current production.
These castings take shock loading, abrasion and weather, so section thickness is generous and soundness matters more than surface finish. Most run on ARPA 450, ARPA 1300 or the Alpha-set No Bake line, in single pieces up to 1,500 kg, then stress relieved before machining so the frame stays true.
What usually decides this work is what happens after the casting. We weld in TIG, MIG and arc, perforate and form sheet to 1,000 mm width and 2 mm thickness, assemble with bought-in rolled steel, forgings, brass, PTFE, stainless and rubber, and load test on a 2,000 tonne hydraulic press. Approvals in this sector are held with global earthmoving and construction equipment makers. All of it at Arasur, Coimbatore, Tamil Nadu.
What We Make
Heavy frames, brackets and structural castings for excavator and crane builders.
Why This Work Runs Here
Weight range, welding, assembly and a proper coating. A plain foundry sends three of those four somewhere else.
ARPA 450 to 100 kg, ARPA 1300 to 550 kg, and the Alpha-set No Bake line to 1,500 kg on floor moulding at 2,000 x 2,000 x 700 mm. Thick sections need a rigid mould, which is what No Bake gives.
TIG, MIG and arc welding, plus sheet perforation and forming to 1,000 mm width and 2 mm thickness. A casting can be welded into the frame it belongs to without leaving the site.
Castings are combined with bought-in rolled steel, forgings, brass, PTFE, stainless and rubber parts, then load tested on a 2,000 tonne hydraulic press to your specification.
Primer paint is applied in house. Powder, zinc, galvanised and manganese phosphate finishes are arranged through approved partners, so machines that live outdoors leave properly coated.
Specifications
Send a drawing and we will confirm against your part. The figures below are the working envelope at Arasur, Coimbatore.
| Item | What We Offer |
|---|---|
| Materials | Ductile (SG) iron EN-GJS-400-18 to EN-GJS-900-2, grey cast iron EN-GJL-250 to EN-GJL-300, cast steel to IS 1030 and ASTM A27 / A148 / A216, alloy steel to IS 7598 and ISO 683-7 |
| Typical part weight | 1 kg to 1,500 kg in a single piece. A 300 kg earthmoving frame is in current production |
| Moulding routes | ARPA 450 (to 100 kg), ARPA 1300 (to 550 kg), Alpha-set No Bake fast loop line and floor moulding (to 1,500 kg) |
| Heat treatment | Stress relieving, normalising, annealing, hardening and tempering, and induction hardening |
| Machining | Vertical turn mill to 1,750 mm diameter, five VTL, 20 VMC with 4th axis and through-coolant, and four HMC including a MAG Specht 500X five-axis and a Starrag IWK 5000 |
| Fabrication | TIG, MIG and arc welding. Sheet perforation and forming to 1,000 mm width and 2 mm thickness |
| Assembly | Castings combined with rolled steel, forgings, brass, PTFE, stainless and rubber components |
| Testing | Ultrasonic and magnetic particle inspection, and load testing on a 2,000 tonne hydraulic press to customer requirement |
| Finishing | Primer paint in house. Powder, zinc, galvanised and manganese phosphate coatings through partners |
| Supply condition | Raw casting, machined, painted, fabricated, or fully assembled and tested |
Applications
Six part families we run for excavator, loader and earthmoving equipment builders.
Large ductile iron frames carrying slew and boom loads. Floor moulded, stress relieved, then machined flat so the turntable bearing seats true.
Pin-bore brackets under shock and fatigue loading. Ultrasonically checked before machining, because a bore that opens up on site is a warranty claim.
Abrasion-facing parts in ductile iron and cast steel, hardened and tempered where the drawing calls for it.
Heavy grey iron sections up to 1,500 kg, floor moulded, then painted or fabricated into a finished assembly.
Cored bodies that have to be leak tight. Machined here, with pressure testing where the drawing requires it.
Castings welded in TIG, MIG or arc with rolled steel and formed sheet, then load tested on the 2,000 tonne press and supplied ready to fit.
Quality Gates
Six checks between the furnace and the packing bay. A part that fails one does not move to the next.
Every heat is read on an ARL spectrometer before pouring, and the result is recorded against the batch.
Ductile iron is checked by ultrasonic velocity, then confirmed under a microscope with image analyser for graphite shape and count.
Tensile strength, elongation and hardness on samples poured from the same heat as your castings.
Large frames and brackets are measured on the 1,500 x 1,200 x 1,000 mm Brown and Sharpe CMM with a scanning probe.
Ultrasonic and magnetic particle inspection in house, with particular attention to pin bores. Radiographic inspection through an accredited partner when specified.
Assemblies are load tested on a 2,000 tonne hydraulic press where required, then primed or coated, packed and documented.
Common Questions
At 127/3B, Sangothipalayam Road, Arasur, Coimbatore, Tamil Nadu 641407, India. Foundry, machine shop, fabrication, assembly and load testing are all on one 523,200 sq ft site, so a frame is cast, welded and tested without leaving Coimbatore.
Swing frames and turntable parts, boom and link brackets, track and roller components, counterweights and ballast parts, hydraulic manifolds and housings, and welded sub-assemblies.
Up to 1,500 kg in a single piece, on floor moulding at 2,000 x 2,000 x 700 mm. ARPA 450 covers parts to 100 kg and ARPA 1300 to 550 kg. A 300 kg earthmoving frame is in current production.
Yes. TIG, MIG and arc welding are done in house, along with sheet perforation and forming to 1,000 mm width and 2 mm thickness, so a casting can be welded into the assembly it belongs to on the same site.
Yes. Castings are combined with bought-in rolled steel, forgings, brass, PTFE, stainless and rubber components, then load tested on a 2,000 tonne hydraulic press to your specification.
Primer painting is done in house. Powder, zinc, galvanised and manganese phosphate finishes are arranged through approved coating partners.
Ductile (SG) iron in EN-GJS-400-18 to EN-GJS-900-2, grey cast iron in EN-GJL-250 to EN-GJL-300, cast steel to IS 1030 and ASTM A27, A148 and A216, and alloy steel to IS 7598 and ISO 683-7.
Yes. Construction and earthmoving accounts for around a tenth of total output, and each customer in this sector audited the plant before placing a first order.
Certifications
Send a Drawing
Send the drawing with the material grade, the single-piece weight, the annual volume and whether you want it raw, machined or fully assembled. You get back the moulding route, a lead time and a price from Coimbatore.
Before you go
Our brochure and every current certificate, in PDF, for your vendor file.
Or send us a drawing
