10 min read
Bending and welding
→Controlling weld distortion in frames
Why welded frames move, the sequence and fixture rules that hold the diagonal, and the distortion allowance to put on the drawing before quotation.
Ganesh engineering library
Sheet metal, explained by the people who make it
377 guides on stamping, laser cutting, bending, welding, coating and the parts we build for lift, power, data centre, railway and farm equipment. Every article is reviewed by the engineering team before it is published.
- 377
- published guides
- 14
- topic hubs
- 3 Nov 2026
- last technical review
Browse by topic
Nine clusters, each mapped to a capability or product page.
32Stamping, presses and press toolsPressed, punched and deep drawn sheet metal parts, the tooling that makes them, and the DFM rules that decide whether a part suits a press at all.29Laser cutting and sheet metal fabricationFibre laser cutting, nesting, edge quality, tolerance and the cost drivers behind a cut part, including long panels cut on the 40 ft × 16 ft bed.38Bending, welding and finished assembliesPress brake bending, bend allowance, fixtures, robotic MIG welding, distortion control and the tolerances a finished welded assembly can actually hold.28Surface treatment and powder coatingSeven-tank pretreatment, phosphating, shot blasting, powder and wet paint selection, film thickness and the failure modes that show up two monsoons later.22Elevator and lift componentsCounterweight frames, car frames, slings, guide rail brackets, door panels and controller enclosures made to lift OEM drawings.24Genset, canopy and acoustic enclosuresDG set canopies, acoustic panels, louvres, base frames, skid bases and control panel enclosures, engineered for weather, access and noise.28Data centre racks and electrical enclosures19-inch rack frames, mounting rails, perforated doors, blanking panels, PDU brackets and the electrical enclosures around them.16Tractor, forklift and material handlingTractor panels and brackets, forklift overhead guards, counterweight covers, mast parts and material handling components built for vibration and abuse.16Railway, furniture and infrastructureRailway coach panels, underframe brackets, fittings, metal furniture frames, shelving and signage, where standards and traceability carry as much weight as the part.38Materials and gradesGrade selection for CRCA, stainless, aluminium, brass and copper: formability, thickness, corrosion and what the mill certificate actually guarantees.30Standards and complianceWhich standard applies, what it actually covers, and the evidence a buyer should ask for: ISO, IEC, EN, RDSO and material certification.44Design and CADDesign rules, CAD hand-off, bend allowances, tolerance stacks and the drawing notes that decide whether a part is made right first time.4Applications and casesApplication-led problems from lift shafts, genset sites, data halls, railway coaches, farms and warehouses, and how the part is designed around them.28Plant, quality and sustainabilityHow the plants run: quality systems, inspection, calibration, pretreatment chemistry, effluent, maintenance, energy and scrap.
All guides, page 21
Search the library →10 min read
Design and CAD
→Tolerance versus capability: setting a number the process holds
Tolerance versus capability with real spread figures: what Cp and Cpk mean on a formed part, the arithmetic for a 300 mm bracket, and how to set a number the shop can hold.
12 min read
Railway and infrastructure
→Railway underframe bracket manufacturing: plate to galvanised
How a railway underframe bracket is made in 6–12 mm IS 2062 plate: hole patterns, fillet welds, distortion control, galvanising vents and the release file.
10 min read
Racks and enclosures
→Outdoor enclosure IP rating: design and failure modes
An outdoor enclosure IP rating is earned by the assembled box, not the sheet. What IEC 60529 tests, where IP65 leaks, and the drawing fields that hold the seal.
10 min read
Coating
→Masking plugs and caps: protecting threads at scale
Which masking plugs and caps survive a 190 °C cure, how much interference a hole needs, and how to kit and count them on a production line.
10 min read
Standards
→Certificate of conformity: scope, limits and evidence
A certificate of conformity declares, it does not measure. What the CoC names, what sits behind it, and which characteristics need a record with values instead.
10 min read
Applications
→Spare parts and service: fitting the installed base
A replacement panel that will not bolt on is a specification problem, not a manufacturing one. What to dimension on the installed base, and the numbers that decide fit.
11 min read
Elevators
→Elevator controller enclosure manufacturing: route and DFM
How an elevator controller enclosure is bent, welded, masked and coated, with the door gaps, earth bonding and IP details that decide whether it passes.
10 min read
Plant and quality
→Pretreatment bath titration: what is measured and how often
Pretreatment bath titration explained: free and total alkalinity, free acid, pH, rinse conductivity and coating weight, with frequency and acceptance limits.
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