Welded Sub-Assemblies Manufacturer in India

Robotic welding of an automotive sheet metal sub-assembly on a production line

Presco-Mec Group is a welded sub-assemblies manufacturer in India, joining stamped and formed sheet metal components into ready-to-fit sub-assemblies for automotive OEMs and Tier-1 companies. With 38+ years of manufacturing experience, IATF 16949:2016 certified processes and two production units in Faridabad, Haryana, we take a part from drawing to dispatch through tooling, pressing, welding, surface treatment and inspection in one in-house process chain, so your line receives one finished unit instead of a kit of loose parts.

A welded sub-assembly is judged by how it fits, not by how its parts look on their own. Fitment depends on how each joint is made, how part tolerances add up across the build and whether the finish survives welding. We plan for all three at the drawing stage. For the full range of assembly types by platform, see our automotive assembly manufacturer and supplier in India page.

Welded Sub-Assemblies We Manufacture

Our press shop, weld shop and inspection room produce welded units for these applications:

Brake system sub-assemblies, including back plate assemblies
Chassis and cabin sub-assemblies: structural brackets, mounts and frame members
Engine mounting and bracket sub-assemblies
Two-wheeler frame, bracket and structural sub-assemblies
Tractor and off-highway structural sub-assemblies
Custom welded sub-assemblies made to customer drawings

Where a programme needs only the stamped part, we supply it as a single component. Where it needs the joined unit, we supply the sub-assembly.

Robotic welding cell joining stamped brackets into a sub-assembly

Stamped steel components ready to be welded into sub-assemblies

Welding Processes Matched to the Joint

Our weld shop runs MIG, robotic, spot and projection welding, and the process is chosen to suit the joint, the material and the volume. Repeatable joints at production volumes are supported by purpose-built Special Purpose Machines (SPMs) that we have developed with established equipment partners for speed of operation and process consistency. Share your joint callouts and weld specifications with the drawing and we will confirm the route as part of the feasibility response.

Why Tolerance Stack-Up Decides Assembly Quality

When several parts are joined into one unit, each part's variation and each joint's distortion add together. A bracket that is within tolerance on its own can still miss its mounting position once it is welded into a sub-assembly. We manage this by reviewing the build at the drafting stage, welding in repeatable cells and checking finished sub-assemblies in our standard room with Coordinate Measuring Machines (CMM), a Profile Projector and a Faro Arm before dispatch.

Coordinate measuring machine checking a welded steel sub-assembly

Powder-coated steel sub-assemblies moving on a conveyor line

Why OEM and Tier-1 Sourcing Teams Choose Presco-Mec Group

38+ years of manufacturing experience and 200+ skilled team members
IATF 16949:2016, ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 certified systems, detailed on our Quality Profile page
Tooling development coordination, press operations, welding, surface treatment and inspection across our manufacturing operations.
Fewer supplier hand-offs: one quality system to audit and one point of accountability for fitment, finish and delivery
10+ OEM relationships and 25+ industry awards, see our featured customers
D&B D-U-N-S registered (65-006-5357) for fast vendor verification
Warehouses in Pithampur, Jamshedpur, Pune and Chennai for delivery close to your plant, see all manufacturing locations

Certified manufacturing & quality systems

Our manufacturing operations are certified to internationally recognised automotive and quality standards.

IATF 16949:2016

ISO 9001:2015

ISO 14001:2015

ISO 45001:2018

View quality profile & certificates

Our Manufacturing Process: From Drawing to Dispatch

Drawing Review: Review the drawing and bill of materials for manufacturability.
Tooling Development: Coordinate production tooling design and development using SolidWorks and CAD/CAM, in collaboration with your engineering team.
Pressing Form components in the press shop through controlled press operations.
Welding: Use MIG, robotic, spot or projection welding, depending on the joint requirements.
Surface Treatment: Process finished sub-assemblies on the PTCED line or conveyorised powder-coating line as specified in the drawing.
Inspection: Verify critical dimensions using CMM, Profile Projector and Faro Arm equipment, as required, before release.

Process steps from tooling to inspection for a welded sub-assembly

Vehicle platforms that use welded sheet metal sub-assemblies

Consolidating Several Parts Into One Sub-Assembly

Moving from loose parts to a welded sub-assembly takes fit-and-weld work off your own line and reduces the number of part numbers you receive, store and track. It also gives you one supplier answerable for the joined unit. If you currently buy the components of an assembly from separate vendors, send us the drawings and we will tell you whether they can be consolidated.

The same process covers brake, chassis, engine, two-wheeler, tractor and off-highway programmes, so procurement teams can consolidate several commodities with one audited vendor.

What to Include in Your Welded Sub-Assemblies RFQ

To assess manufacturing feasibility and prepare an accurate quotation, share as much of the following information as available:

Part drawings and CAD data: 2D drawings, 3D models and assembly drawings showing component interfaces and joint locations.
Material specifications: Material grade, thickness and applicable material standards.
Welding requirements: Specified joint types, weld locations, weld symbols and any customer-defined acceptance criteria.
Dimensional requirements: Critical dimensions, tolerances, GD&T and fitment requirements for the finished assembly.
Surface finish: PTCED, powder coating or other specified finishing requirements, where applicable.
Production volumes: Estimated annual quantities, expected ramp-up and recurring order requirements.
Quality and approval requirements: Applicable inspection plans, validation requirements and PPAP/APQP documentation, where required by the customer.
Project timelines and delivery location: Target SOP date, sample requirements and intended delivery schedule.

Our engineering team can review the available information to assess feasibility, identify tooling and process requirements, and clarify any additional details needed for quotation.

Share your drawings and requirements through our Business Enquiry page to start a sourcing discussion.

Reviewed by Sunil Goyal, Chief Operating Officer

Welded metal sub-assembly RFQ requirements

FAQ

What information is required to request a quotation for welded sub-assemblies?

Share 2D drawings or 3D CAD models, material specifications, welding and finishing requirements, expected annual volumes, quality documentation requirements and target timelines. Our engineering team can review the information and identify any additional inputs required for feasibility assessment.

Can Presco-Mec support new welded sub-assembly development?

Presco-Mec can review customer drawings and manufacturing requirements to assess feasibility. Confirm the availability and scope of prototype development, tooling, sample validation and PPAP/APQP support with the engineering team before publishing a more specific commitment.

How can buyers confirm whether a welded sub-assembly meets their quality requirements?

Quality verification should be based on the approved drawing, applicable weld acceptance criteria and the customer's inspection plan. Confirm which dimensional reports, weld inspection records and other quality documents Presco-Mec can provide for the specific programme.

Can you consolidate loose parts we buy from several vendors into one sub-assembly?

Often, yes. Send us the drawings and bill of materials, and we will confirm whether the parts can be pressed, welded, finished and inspected as one sub-assembly, and what tooling it needs.

Do you develop tooling and special purpose machines for a new sub-assembly?

We support production tooling design and development using SolidWorks and CAD/CAM, in coordination with your engineering team. Depending on project requirements, tooling development and manufacture may involve our internal capabilities and external equipment or tooling partners. We also deploy purpose-built Special Purpose Machines (SPMs), developed with established equipment partners, to support repeatable joint quality at production volumes.

What surface treatment is applied to finished sub-assemblies?

Finished sub-assemblies can be processed on our PTCED (cathode electro deposition) line or our conveyorised powder-coating line, depending on the corrosion protection and finish specified in the drawing.

Can you support new-platform development as well as series production?

Yes. Our in-house tool design and development, combined with CMM-based inspection, supports a programme from first samples through to series production.

Do you supply individual stamped components as well as welded sub-assemblies?

Yes. Where a programme needs only the stamped part we supply it as a single component, and where it needs the joined unit we supply the sub-assembly. Both come from the same press, weld and inspection process.

How can we verify Presco-Mec Group as a vendor?

Our IATF 16949:2016, ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 certificates are shown on our Quality Profile page. We are also D&B D-U-N-S registered (65-006-5357), and our customer list and manufacturing locations are published on the website.

Last updated: October 15, 2026