# Kolkata manufacturing cluster: castings and leather goods > Kolkata – Howrah, West Bengal, is known for foundry and engineering and leather goods. Processes, ports and nearby clusters, mapped by SourceSquid. Source: https://sourcesquid.co/india-atlas/clusters/kolkata/ Major cluster · West Bengal # Kolkata – Howrah. Foundry and engineering and leather goods. Kolkata – Howrah, in West Bengal, is a major national manufacturing cluster for castings, leather goods and machined parts. Buyers come here for foundry and engineering and leather goods. [Get a free teardown](https://sourcesquid.co/start/?cluster=kolkata) [All West Bengal clusters](https://sourcesquid.co/india-atlas/states/west-bengal/) Named shortlist from USD 390 10 km to Kolkata seaport Bengali on the factory floor 1,560 km from our Bengaluru office Locator · **Kolkata – Howrah** 22.57° N, 88.36° E * __Kolkata * __Nearby clusters * __Seaport * __Inland depot (ICD) Nearest seaport Kolkata · 10 km Nearest ICD ICD Amingaon (Guwahati) · 530 km At a glance ## Kolkata, the short version. What the cluster makes, who works there, and how goods leave. Distances are straight-line from the city centre. Known for Foundry and engineering and leather goods Processes [Casting & foundry](https://sourcesquid.co/india-atlas/processes/casting-and-foundry/), [Leather & footwear](https://sourcesquid.co/india-atlas/processes/leather-and-footwear/), [Machining & precision](https://sourcesquid.co/india-atlas/processes/machining-and-precision/) State [West Bengal](https://sourcesquid.co/india-atlas/states/west-bengal/)One of 3 clusters mapped in West Bengal Languages Bengali Scale Major clusterA major national manufacturing cluster Nearest seaport Kolkata, 10 kmKolkata, West Bengal Nearest ICD ICD Amingaon (Guwahati), 530 kmInland container depot for customs clearance and rail to port State ports Kolkata and Haldia From Bengaluru 1,560 kmSourceSquid's India office Processes ## What Kolkata does best. 3 process families, each with its own page of methods, materials and buying tips. [Process family**Casting & foundry**Investment (lost-wax) casting · Green-sand casting · No-bake (resin sand) casting · Shell moulding](https://sourcesquid.co/india-atlas/processes/casting-and-foundry/)[Process family**Leather & footwear**Chrome and vegetable tanning · Leather finishing and embossing · Clicking (cutting) · Closing (upper stitching)](https://sourcesquid.co/india-atlas/processes/leather-and-footwear/)[Process family**Machining & precision**CNC turning · CNC milling (3, 4 and 5-axis) · Turn-mill and Swiss-type machining · Cylindrical and surface grinding](https://sourcesquid.co/india-atlas/processes/machining-and-precision/) ### Materials worked in Kolkata * [Cast iron (grey and ductile)](https://sourcesquid.co/india-atlas/materials/cast-iron/) * [Jute, coir and natural fibres](https://sourcesquid.co/india-atlas/materials/jute-and-natural-fibres/) * [Leather](https://sourcesquid.co/india-atlas/materials/leather/) Product families ## Made in Kolkata, step by step. Open a product to see its process chain. Each links to the full guide with QA tests, HS heading and lead times. **Leather goods & footwear**6 steps · Samples 3–4 weeks 1. **Leather** · Finished leather from certified tanneries 2. **Clicking** · Pattern cutting 3. **Closing** · Upper stitching 4. **Lasting & sole** · Cemented, Goodyear or injected soles 5. **Finishing** · Polish, trims, QC 6. **Pack** · Boxed, tissue, labels [Full guide to leather goods & footwear →](https://sourcesquid.co/india-atlas/products/leather-goods-footwear/) **Pump and valve components** 6 steps · Samples 5–8 weeks including patterns 1. **Pattern & core** · Wood or metal patterns and sand cores 2. **Casting** · Grey iron, ductile iron, bronze or stainless steel 3. **Fettling & heat treatment** · Cleaning, then annealing or solution treatment 4. **Machining** · Bores, flanges and seats machined on CNC 5. **Pressure testing** · Hydrostatic test of bodies and casings 6. **Painting & packing** · Epoxy or enamel coat, flange covers fitted [Full guide to pump and valve components →](https://sourcesquid.co/india-atlas/products/pump-valve-components/) **Grey and ductile iron castings** 7 steps · Patterns and samples 4–6 weeks 1. **Pattern making** · Wood, metal or resin patterns and core boxes 2. **Moulding** · Green-sand or no-bake moulds with cores 3. **Melting & pouring** · Induction melting; inoculation and magnesium treatment for ductile iron 4. **Knock-out & fettling** · Sand removed, risers cut, grinding 5. **Heat treatment** · Annealing or normalising as specified 6. **Machining & painting** · Critical faces machined, primer applied 7. **Inspection** · Chemistry, microstructure, hardness and dimensions [Full guide to grey and ductile iron castings →](https://sourcesquid.co/india-atlas/products/iron-sand-castings/) **Leather bags, belts and accessories** 7 steps · Samples 2–4 weeks 1. **Leather selection** · Finished leather from LWG-rated tanneries 2. **Pattern & clicking** · Panels cut by press knife or by hand 3. **Skiving & edge preparation** · Edges thinned, then painted or turned 4. **Stitching & assembly** · Panels and linings assembled 5. **Hardware fitting** · Zips, buckles and rivets attached 6. **Finishing & QC** · Cleaning, polishing and inspection 7. **Packing** · Dust bags, tissue and cartons [Full guide to leather bags, belts and accessories →](https://sourcesquid.co/india-atlas/products/leather-bags-accessories/) **Leather saddlery and equestrian goods** 6 steps · Samples 3–5 weeks 1. **Leather selection** · Drum-dyed harness and bridle leather graded for thickness, grain and stretch 2. **Saddle tree** · Laminated wood or moulded fibre trees in the agreed width fitting and gullet size 3. **Cutting & skiving** · Seats, flaps and straps clicked from graded hides, edges skived 4. **Stitching & assembly** · Machine and hand stitching; seat built up on the tree, panels flocked or foam-filled 5. **Fittings & finishing** · Brass or stainless buckles, D-rings and stirrup bars fitted; edges burnished and waxed 6. **Inspection & packing** · Stitch, strength and symmetry checks; leather conditioned and bagged for sea freight [Full guide to leather saddlery and equestrian goods →](https://sourcesquid.co/india-atlas/products/leather-saddlery-equestrian/) **Leather aprons and workwear accessories** 6 steps · Samples 2–3 weeks 1. **Leather selection** · Cow softy, crazy-horse or NDM hides chosen for thickness, temper and shade 2. **Cutting** · Patterns clicked with dies or cut by hand, keeping straps out of weak belly areas 3. **Stitching** · Pockets, reinforcements and edges stitched with bonded thread 4. **Hardware & straps** · Cross-back or neck straps riveted with copper or brass rivets; buckles and D-rings fitted 5. **Edges & branding** · Edges painted or burnished; logo debossed or laser-marked 6. **Inspection & packing** · Stitching, rivet pull and shade checks; folded with tissue and moisture control [Full guide to leather aprons and workwear accessories →](https://sourcesquid.co/india-atlas/products/leather-aprons-workwear/) Within 250 km ## Clusters close to Kolkata. Useful when one trip should cover several suppliers, or when a part needs a process Kolkata does not run. [ 40 km away Major cluster **Hooghly jute belt** Jute bags, yarn & fabrics Natural fibres ](https://sourcesquid.co/india-atlas/clusters/hooghly/)[ 220 km away Established cluster **Jamshedpur** Steel, auto components ForgingAuto & EV components ](https://sourcesquid.co/india-atlas/clusters/jamshedpur/) Geographical Indications ## West Bengal's GI products. 44 registered GI products come from West Bengal, with 2 more applications pending. A few of them: [See all 44 in West Bengal](https://sourcesquid.co/india-atlas/states/west-bengal/#gi) * [Baluchari Saree Handloom sarees & fabrics](https://sourcesquid.co/india-atlas/gi/handloom-sarees-and-fabrics/#west-bengal) * [Banglar Muslin Handloom sarees & fabrics](https://sourcesquid.co/india-atlas/gi/handloom-sarees-and-fabrics/#west-bengal) * [Bankura Brass & Bell Metals Utensils Metalware & bronze](https://sourcesquid.co/india-atlas/gi/metalware-and-bronze/#west-bengal) * [Bankura Panchmura Terracotta Craft Glass & ceramics](https://sourcesquid.co/india-atlas/gi/glass-and-ceramics/#west-bengal) * [Bengal Dokra Metalware & bronze](https://sourcesquid.co/india-atlas/gi/metalware-and-bronze/#west-bengal) * [Bengal Patachitra Paintings & paper crafts](https://sourcesquid.co/india-atlas/gi/paintings-and-paper-crafts/#west-bengal) * [Bishnupur Dashavatar Tash Paintings & paper crafts](https://sourcesquid.co/india-atlas/gi/paintings-and-paper-crafts/#west-bengal) * [Clay Doll of Krishnanagar Toys & dolls](https://sourcesquid.co/india-atlas/gi/toys-and-dolls/#west-bengal) * [Cooch Behar Sitalpati Natural fibre crafts](https://sourcesquid.co/india-atlas/gi/natural-fibre-crafts/#west-bengal) * [Dalle Khursani Tea, coffee & spices](https://sourcesquid.co/india-atlas/gi/tea-coffee-and-spices/#west-bengal) How SourceSquid covers Kolkata ## Your team in Kolkata. Our Bengaluru team covers Kolkata in person: factory search, audits, samples and inspections. This is what working with us there looks like. * **Factory search on the ground** Our Bengaluru team visits Kolkata to screen factories in person, then shares a named shortlist with the evidence behind it. * **Audits before you commit** On-site audits of the strongest Kolkata candidates, scored on capability, quality systems and capacity. * **Samples to golden sample** First articles measured against your drawing, then a signed golden sample that every lot is checked against. * **Inspections on every lot** In-line and pre-shipment inspections in Kolkata to your AQL, with photo and measurement reports. * **English on every document** Drawings, specifications and reports for Kolkata suppliers are handled in English, the working language of Indian export paperwork. * **Shipping via Kolkata** We plan the route to Kolkata or ICD Amingaon (Guwahati), and check export documents before the truck leaves. Kolkata questions ## Straight answers. Anything else, ask us directly. A principal replies, not a bot. [anirudh@sourcesquid.co](mailto:anirudh@sourcesquid.co) ### What is Kolkata – Howrah known for manufacturing? Kolkata – Howrah is known for foundry and engineering and leather goods. It is a major national manufacturing cluster in West Bengal, and its main product groups are castings, leather goods and machined parts. ### Which port is nearest to Kolkata – Howrah? The nearest seaport is Kolkata, about 10 km away in a straight line. The nearest inland container depot is ICD Amingaon (Guwahati), about 530 km away. Exporters in West Bengal commonly ship through Kolkata and Haldia. ### How do I find good manufacturers in Kolkata – Howrah? Send SourceSquid a short brief with a drawing, photo or sample. We return a named shortlist of Kolkata manufacturers screened on evidence, then audit the strongest on site before you place an order. Start here ## Get a named shortlist of Kolkata manufacturers. Send one drawing, photo or quote. We return how it is made, the right factories in the cluster and a realistic target price. [Get a free teardown](https://sourcesquid.co/start/?cluster=kolkata)[Talk to a principal](https://sourcesquid.co/contact/) Named shortlist from USD 390