IndiaUnbox connects you to audited foundries, forges, precision machine shops, sheet-metal fabs, gear houses and machine-tool makers across India—delivering print-to-part components and assemblies with traceability, tight tolerances and certs that travel.

What we make

• Castings (Ferrous & Non-ferrous)
  Grey & ductile iron (GG/GGG), steel (carbon/alloy), aluminium (sand/HPDC/gravity), bronze/brass; sizes from 0.2 kg to 3,000+ kg; NDT-ready.
  
• Forgings & Rings
  Open/closed die, upset, rolled rings; normalised, Q&T or induction hardened; near-net shapes to save machining.
  
• Precision Machining & Assemblies
  CNC turning/milling (3- to 5-axis), HMC/VMC, grinding (ID/OD/surface), honing, broaching, gun-drill, EDM (wire/sinker); GD&T held to spec; kitted sub-assemblies with fasteners/seals.
  
• Gears & Power Transmission
  Spur/helical/bevel/worm, shafts, splines; hobbing/shaping, carburizing/nitriding, profile grinding; AGMA/ISO grades.
  
• Sheet-Metal & Fabrication
  Laser/plasma/water-jet, turret punch, press-brake, roll-form; MIG/TIG/SAW with WPS/PQR; shot-blast, powder coat, zinc-nickel, e-coat, hot-dip galvanizing.
  
• Hydraulics & Pneumatics
  Manifolds, cylinders, valves blocks, precision tubes, hose assemblies; pressure-tested with leak certificates.
  
• Fasteners & Turned Parts
  Bolts, studs, screws (cold/hot-forged), CNC turn-mill, Jamnagar brass precision parts.
  
• Automotive/EV Sub-systems
  Housings, knuckles, brackets, control arms, hubs, carriers, engine/transmission parts; battery trays, busbars, motor mounts, charger enclosures.
  
• Jigs, Fixtures & Tooling
  Checking fixtures, weld jigs, press tools, patterns & core boxes, progressive dies.
  
• Machine Tools & Spares
  CNC lathes, VMC/HMC, special purpose machines, spindles & ballscrews; rebuilds & retrofits on request.
  

Materials & grades we work with

• Steels: AISI 1018/1045, 4140/4340 (EN19/EN24), 8620, 17-4PH; SS 304/304L/316/316L/410/420.
  
• Irons: GG20/25, SG iron GGG40/50/60.
  
• Aluminium: 6061-T6, 6082-T6, 7075-T6, ADC12/LM grades.
  
• Copper alloys: IS 319 brass, C83600/C86300 bronzes.
  
• Others: tool steels (D2/H13), duplex SS, PEEK/Delrin machining when specified.
  
• Docs: Mill Test Certificates EN 10204 3.1/3.2; heat/lot traceability.
  

Where we build (key Indian hubs)

• Pune / Pimpri-Chinchwad / Nashik / Aurangabad (MH) – auto, gears, precision machining
  
• Chennai / Sriperumbudur / Hosur / Coimbatore (TN) – foundry/forging, pumps, CNC, fabrication
  
• Rajkot / Kolhapur / Belagavi (GJ/MH/KA) – castings, diesel parts, machine tools
  
• Ludhiana / Jalandhar (PB) – fasteners, hand tools, forgings
  
• Faridabad / Manesar / Noida / Neemrana (NCR/RJ) – sheet-metal, assemblies, auto tiers
  
• Jamnagar (GJ) – brass turned parts & fittings
  
• Sanand / Ahmedabad / Halol (GJ) – auto & heavy engineering
  
• Pithampur / Indore (MP) – commercial vehicle & machining clusters
  
• Rudrapur / Haridwar (UK) – white goods, fabrication
  

Quality, testing & compliance (we manage, you approve)

• Systems: ISO 9001/14001/45001, IATF 16949 (auto lines), ISO 3834 (welding); PED/CE capable plants for pressure parts.
  
• Metrology: CMM (programmable), height gauges, surface roughness, roundness, contour, hardness (HB/HRC/HV), spectro/XRF.
  
• NDT: UT, RT, MPI, DPI, helium/air leak tests; pressure & burst tests.
  
• Heat treatment: normalise, Q&T, carbo-nitriding, vacuum hardening, induction; furnace charts supplied.
  
• Welding: WPS/PQR & welder quals (ASME IX / ISO 9606); weld maps & visual/RT reports.
  
• Automotive docs: APQP, PFMEA, Control Plan, MSA, SPC, PPAP L3, 8D on deviations.
  

Tolerances & finishes (guidance)

• Machining: ±0.005–0.02 mm typical on ground features; bores honed to IT6-IT7; Ra down to 0.2 µm on ground surfaces.
  
• Casting: ISO 8062 CT8–CT10 (process-dependent); machining stock defined on drawings.
  
• Flatness/parallelism: per GD&T with CMM reports and datum schemes.
  

Customisation & engineering support

• DFM/DFA reviews, topology/thickness optimisation, gating/feeder simulation for castings.
  
• Process flow & CTQs defined before SOP; trial runs with capability (Cp/Cpk) reports.
  
• Supplier-owned or buyer-owned tooling; change-control with ECN tracking.
  

Surface treatments & coatings

• Zinc / Zn-Ni / black oxide / phosphate, anodize (Type II/III), powder coat, e-coat, passivation (SS), shot peen, electropolish. Salt-spray & adhesion tests on request.
  

Packaging & logistics

• Seaworthy + rust-safe: VCI wraps, desiccants, shrink; skids/crates with ISPM-15; part separation to protect finishes.
  
• Barcode/QR traceability, carton/crate maps, shock/tilt indicators; loading supervision with photo/video.
  
• Ports: Mundra, Nhava Sheva, Chennai, Tuticorin, Vizag; air via DEL/BOM/BLR/MAA.
  

Typical MOQs & lead times (guidance)

• Machined parts: 100–1,000 pcs/SKU; lead 3–5 weeks post PPAP.
  
• Castings (machined): 500–2,000 kg mix per heat; lead 4–8 weeks incl. tooling.
  
• Forgings (machined): 300–1,000 pcs/SKU; lead 4–7 weeks.
  
• Fabrications: project-based; 3–6 weeks after drawings/JIGs.
  
• Fasteners: 25k–200k pcs/SKU; 2–4 weeks.
  (Cross-factory consolidation available under one QC/dispatch.)
  

Our sourcing workflow (engineering edition)

1. Brief & NDA – drawings (STEP/IGES/PDF), specs/grades, annual volumes, acceptance criteria.
   
2. Shortlist – 2–4 capable plants with capacity & certification matrix.
   
3. DFM + Quote – risks, cycle time, tooling, control plan; value-engineer options.
   
4. Samples/FAI – FAIR/PPAP L3, CMM reports, NDT/HT certificates.
   
5. Pilot – capability study (Cp/Cpk), packaging trials, PFMEA freeze.
   
6. SOP & QC – in-line SPC, traceability, 100% checks on CTQs, 8D for any non-conformities.
   
7. Ship – docs pack, insurance, photos/video of loading, and after-sales support.
   

Risk controls we enforce

• Material authenticity via spectro/XRF + EN 10204 3.1/3.2 MTCs; heat-lot segregation.
  
• Dimensional drift control with SPC on CTQs; fixture calibration logs.
  
• Weld integrity: PQR-validated parameters, periodic macro-etch, RT/UT sampling.
  
• Corrosion & coating: pre-treatment audits; salt-spray/adhesion gates before dispatch.
  
• IP & data security: controlled drawing access, watermarking, tool/fixture custody.
  

Documentation you receive

• Quote pack with DFM notes, process flow, CP/CTQs; FAIR/PPAP, CMM & NDT reports, HT charts, weld maps, coating certs, packing spec & crate map, high-res QC photos/video, loading report, insurance & origin docs.
  

Case snapshots (illustrative)

• EU off-highway OEM: SG iron knuckle, machined to IT7; Q&T + magnetic particle test; PPAP L3; field claims <0.2% over 12 months.
  
• US industrial pumps: aluminium sand cast impeller, balance grade G6.3; anodized hub; Cp/Cpk >1.67 on bore.
  
• GCC fabrication: skid-mounted frames with MIG/SAW; EN ISO 3834 shop; hot-dip galvanizing; containerized with VCI—no rust on arrival.
  

Micro-FAQ

• Prototype to mass—do you support both? Yes—CNC/3D-printed soft tooling for proto, then hard tooling for SOP.
  
• Tight tolerances? Ground/honed bores to ±0.005–0.01 mm with CMM proof; discuss datum strategy early.
  
• Can I use buyer-owned tooling and gauges? Yes—stored under seal with maintenance logs.
  
• Mix SKUs per container? Yes—plant policy permitting; we also consolidate cross-factory under one QC/dispatch.
  
• Certs for EU/US? PPAP/FAIR, EN 10204 3.1/3.2, PED/CE where applicable; we align to your drawing notes and standards.
  

Ready to brief? Share drawings (STEP/PDF), specs & grades, annual/first-order volumes, acceptance standards (PPAP/FAIR/inspection levels), coating/packaging preferences, and delivery window. We’ll revert with a factory shortlist, sampling plan, and a clear route to SOP.