10 min read
Laser cutting
→Sheet metal finishing after cutting: deburr or leave
Choose the edge finish after cutting by what happens next: coat, weld, slide or show. Ra values, edge radius, method and the minutes each one adds.
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 24
Search the library →11 min read
Bending and welding
→How to calculate bend allowance and bend deduction
Bend allowance is the arc through the neutral axis: 3 mm CRCA at R3 and 90° gives 6.79 mm, a 5.21 mm deduction and a 324.79 mm flat. Formula, table and worked steps.
10 min read
Tractor and forklift
→Forklift counterweight cover design guide: DFM and tolerances
Forklift counterweight cover design: clearance to the casting, panel stiffness, hinge geometry, coating and inspection limits for a 1.5 mm CRCA shroud.
10 min read
Tractor and forklift
→Forklift guard impact: design, failure modes and fixes
Forklift guard impact design: the 662 J drop, roof bar hinge arithmetic, the failures that appear after the test and the drawing fields that prevent them.
10 min read
Standards
→ISO 12944 corrosion protection: scope, limits, film build
ISO 12944 corrosion protection explained: corrosivity categories C1 to CX, the film build each needs, durability classes, and why sheet-metal enclosures differ.
10 min read
Plant and quality
→Supplier change without requalification: the first article still
A material or process change leaves the drawing untouched and moves the part. What a first article must measure when the revision never changes.
10 min read
Design and CAD
→Hole deformation near a bend: why the hole moves
A hole near a bend fails in two ways: it goes oval from the strain gradient and it lands off position from the flat pattern. How to separate and prevent both.
11 min read
Elevators
→Elevator pit ladder manufacturing: stamping, welding, coating
How an elevator pit ladder is cut, welded and powder coated, with rung load, pitch, clearance and anchor numbers for a 1,600 mm lift pit.
9 min read
Elevators
→Laser-cut elevator frame sections: cut file to fit-up
How laser-cut elevator frame sections hold car and counterweight geometry: cut-file rules, hole-to-bend limits, weld distortion and coating checks.
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