9 min read
Railway and infrastructure
→Coach panel flatness: why coating bows a long panel
Why a 2,500 mm coach panel bows after coating: cure temperature, weld shrinkage, stiffener balance and the flatness callout that survives the oven.
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 38
Search the library →12 min read
Genset and canopies
→DG set canopy: design, materials and manufacturing
A DG set canopy is an airflow problem before it is a box: louvre area, mass law attenuation, 1.6 mm skin, 75 dB(A) at 1 m and the cut-form-weld-coat route.
11 min read
Racks and enclosures
→Data centre cable management panel: design and manufacturing
A data centre cable management panel is a radius and load device, not a shelf. Bend limits, bundle derating, bracket stress and the finish for a 19-inch rack.
11 min read
Racks and enclosures
→How a data centre PDU bracket is manufactured
A PDU bracket is a 2 mm cantilever with a hole pattern that must line up to 0.3 mm. Cut, bend, coat and bond: the route and the limits that keep a PDU off the floor.
11 min read
Stamping
→Low-volume stamping without overbuilding tooling
Match press tooling to volume: which features to move off the die, how to split a tool so changes stay cheap, and the break-even arithmetic that decides.
10 min read
Design and CAD
→Springback in CAD for sheet metal: compensating the model
Springback in CAD: how many degrees to compensate, why the formed model should stay nominal, and where the correction belongs instead of the model.
10 min read
Racks and enclosures
→Seismic rack duty: frame, anchors and documentation
Seismic rack duty is a load path and a document, not a thicker upright. Base shear, anchor uplift, frame sway and the evidence a data centre reviewer will ask for.
10 min read
Racks and enclosures
→Box bending for electrical enclosures
How box bending fixes 19-inch enclosure width, corner relief and bend order, with tolerance limits, coating spec and a first-article inspection plan.
13 min read
Tractor and forklift
→Forklift overhead guard design: DFM rules and tolerances
Forklift overhead guard design for manufacture: 1t bend radii, holes 12–18 mm from a bend, 12 mm weld access, 0.18 mm of coating and a workable tolerance stack.
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