Cutters
Kerf Notes
Kerf Notes records the cut width that belongs to the actual material and tooling, not a guessed figure from an old job card. It covers sheet behaviour, heat effect, burr risk, and the allowance needed when parts must fit after bending, welding, or edge finishing.
Kerf values by material batch
Kerf Notes deals with the written side of cut width, material behaviour, and the allowances that must be carried into production. We turn those points into notes the floor can use when selecting tooling and checking finished work. It is for teams that want kerf decisions recorded clearly, not passed on by habit.
Notes start with the stock on hand, the required edge quality, and the machine settings now being used. Mild steel plate, aluminium sheet, stainless, timber composites, and plastics each carry kerf differently, especially when humidity, dust, or worn consumables are part of the day.
A useful note ties the measured cut width to one cutter, one thickness range, and one inspection method. That gives the operator something they can compare against a first-off part instead of relying on memory when the next run starts.
What the note must capture
The record should name the material grade, thickness, tool type, intended offset, and the dimension checked after cutting. Where scrap strips are narrow or hole size is critical, the note should also state the minimum acceptable result and where the measurement was taken.
Link Kerf Notes to the relevant entries under Cutters, Applications, and Edgework when the cut affects later operations. Use the contact form to send material thickness, current tool details, and the sample edge result if the note needs updating.
- Measured kerf against actual stock
- Offset noted before production quantities
Conditions that change cut width
Highveld dust can affect guides and sensor readings, while coastal air can influence corrosion on stored tooling and sheet. When a cell works around power interruptions or mixed stock from different suppliers, kerf figures need to be checked against the current batch rather than copied from a previous order.
Thin sheet may show heat pull or edge roughness long before a nominal dimension fails inspection. Plate can hold size but still leave a taper or dross line that changes fit-up later, so the note should say what to inspect and where rejection begins.
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Information needed for a usable note
Send the material type, thickness, machine process, tool size, and the dimension that is going out. Include what was measured on the first sample and whether the problem is oversize, undersize, taper, burr, or edge burn.
Keep Kerf Notes with the job record, nesting output, and inspection sheet for that part family. When the same profile returns months later, the note should show which allowance worked and which setting produced the accepted edge.
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