What the client was solving for
The client was a metal-fabrication job-shop with 30+ years of custom and small-batch experience. They had won a contract opportunity to supply OEM steel components into an industrial customer — a long-term, repeatable order requiring tighter tolerances and higher throughput than their existing equipment could comfortably deliver. The contract was attractive, but only if it could be added without losing the custom job-shop work that paid the bills today.
Two equipment vendors had already been to site. One proposed a fully imported turnkey cell aimed at the new contract work, sized for steady-state OEM volume. The other proposed local refurbishment of older machines. Neither approach addressed the product-mix reality.
The operating constraints that shaped the design
- Product mix would shift week to week — the new OEM contract was firm but the custom work would not stop. The cell had to handle both without long changeovers, including handling different stock thicknesses and frame sizes on the press and laser.
- Tolerance step-up — the new OEM work required tighter dimensional accuracy than the shop's existing machine pool could reliably deliver. The press and laser needed to be specified for the new tolerance, not the historic one.
- Local skilled labour pool — strong operators, less depth on imported CNC programming. Controls platform had to be one the local SI pool could service and extend, not a closed proprietary system.
- Power and floor — adequate three-phase supply, building extension already underway for the new cell. Floor flatness specified for the press's level requirements.
- B-BBEE scoring — local-content contribution carried real weight in tender position with two existing key customers. Imported share had to be defensible.
- Spares and consumables — laser optics, press tooling, and welding consumables on a continent away from the OEM. Spares strategy had to be planned, not improvised.
The cell, line by line
| Element | Source | Why this side |
|---|---|---|
| Fibre-laser cutter (4 kW) | China OEM | Specialist; mature product class; clear performance/price ratio |
| Hydraulic press-brake (160 t, CNC backgauge) | China OEM | Specialist; CNC backgauge and tonnage class supports the new tolerance |
| MIG welding cell with positioner | China OEM (cell), locally sourced welders (named brand) | Welding power source local for service; cell hardware imported |
| Sheet-stock handling and bridge crane | Local fabricator + dealer | Bulky structural scope; freight-uneconomic to import; local service |
| Laser dust extraction and filtration | Local SA specialist | Local service; component spares locally supported |
| Compressed-air and nitrogen supply | Local SA dealer | Local service; standard plant scope |
| MCC and main distribution | Local panel builder | Local components; surge protection for the laser |
| Cell PLC and overarching control | Siemens via local SI | Local skill base for ongoing changes |
| CAM seat and laser nest programming | Locally trained team + OEM support | Embedded in operator team; not vendor-locked |
| Tooling kit (press dies, laser optics buffer) | Mixed: OEM-supplied + CISH-buffered | Pre-positioned spares for first 12 months |
| Job-tracking dashboard | addanode IoT platform via CISH | Per-job cycle visibility, open data, no lock-in |
Decision rule applied: for a job-shop that has to stay flexible, the wrong question is "what is the cheapest cell that can do this contract?" The right question is "what cell handles this contract and the next three different ones the business will take in year two?" Specify for the flexibility, not just the contract.
Delivery sequence — 20 weeks PO to first cutting hour
- Weeks 0–3 — Cell layout and machine specification frozen. Floor flatness, building extension scope, services brief, tooling list for the OEM contract first run.
- Weeks 3–14 — Parallel build. Laser, press-brake, and welding cell built in China. Local fabricator built handling and crane infrastructure. Building extension progressed in parallel.
- Weeks 13–14 — FAT in China. Client representative + CISH lead present. Press-brake and laser tested with steel samples shipped from SA for backgauge accuracy and laser-nest fit on the actual contract first-run files.
- Weeks 14–17 — Shipping, customs, inland transport. Two 40' containers plus break-bulk for press-brake bed.
- Weeks 17–19 — Installation. Local team plus two visiting Chinese commissioning engineers. Material handling pre-installed by the time machines arrived.
- Weeks 19–20 — Hot commissioning, operator and CAM training, first OEM contract pieces. SAT signed against agreed acceptance — dimensional accuracy on three reference parts, throughput on a mock production day.
Measurable outcome
Capex payback
Cell paid back capex inside ~22 months on the OEM contract alone. The retained custom work added a second revenue stream that was not in the original payback model.
Flexibility
Year one took on three quite different product families — the original OEM contract, a structural-steel sub-contract, and an architectural product line — without rework on the cell.
Tolerance
Dimensional rejection rate on the new OEM work was under 1% sustained through the first six months, comfortably inside the customer's acceptance band.
Local content
Local content on the project came in ~37% of total spend. Improved the client's defensible tender position with two B-BBEE-conscious customers.
What a buyer should take from this case
The single most expensive metal-fab mistake is buying for the contract on the table rather than the work-mix the business actually runs. Cells designed only for the contract become orphaned the moment the contract ends. Cells designed for the work-mix carry the business through the next three contracts.
The second lesson is that in metal fabrication, the imported scope is genuinely earned by the specialist machines — press tonnage, CNC backgauge, laser cut quality. Almost nothing else is. Handling, structural, MCC, and even most of the welding power-source scope are stronger as local — and the maintenance team thanks you in year three.
Use this filter: for a metal-fab cell, list the products you want to make over the next 5 years, not just the current contract. Specify the press tonnage, laser power, and welding capacity for the worst-case product in that list. The cell will outlast the contract.
How CISH structured the engagement
Combined Turnkey Production Lines and Local Design & Manufacturing engagement. CISH carried supplier risk on imported scope and integration risk on local scope. CAM and operator training were embedded for the first six weeks of production. Visibility layer (job tracking and cycle dashboard) via addanode. Discussion format is anonymised snapshot; OEM contract and customer detail available under NDA.
Related reading: Buy from China or fabricate locally? and Metal fabrication production lines.
Frequently asked questions
Does this approach work for stamping, deep-draw, or pure CNC cells?
Yes — the specialist-import / local-handling / locally-serviceable-controls logic generalises directly. Machine class changes; the project structure does not.
Why not refurbish older local machines?
Sometimes refurbishment is the right call. In this case the new OEM contract required tolerances and throughput beyond what the existing machine pool could deliver consistently. Refurbishment would have shifted the problem rather than solving it.
How are laser optics and press tooling spares managed?
A buffer kit was specified at contract stage and stored locally — sized to cover the first 12 months of consumption without an emergency order. Replenishment runs through CISH Johannesburg.
What about laser cutting gas — is the supply reliable?
Nitrogen supply was sized from a local industrial-gas dealer with twin-tank changeover and a service contract. Gas reliability is a project-design question, not a downstream problem.
Can CISH share the named client?
Not on a public page. NDA reference walkthrough available — including discussion with the client's production manager.