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Reverse engineering a spiral bevel gearbox for a fire-water pump

Rebuilding gear data from measurements and a 3D scan, so a legacy gearbox can be remade and rated.

Measured points
Industry
Fire protection
Year
2025
Sheet
7 / 7
Client
Spare-parts manufacturer
Duration
2 weeks
Tools
KISSsoft
Standards
ISO 10300, DIN 743

Spiral bevel pair rebuilt from measured pointsSchematic, not to scale

The question

The spiral bevel gearbox of a diesel fire-water pump had no usable gear data. To produce replacement gears, the geometry had to be reconstructed and the gearbox checked under load.

What the customer received

  • Reconstructed gear data and manufacturing drawing
  • Rating of gears and shafts
  • Results presentation

Services: Failure analysis and reverse engineering, Gear and transmission calculation

What we did

  1. Reverse-engineered the spiral bevel gear data from measurements and a 3D scan.
  2. Generated the gear manufacturing drawing.
  3. Rated the bevel set under load to ISO 10300.
  4. Modelled the shafts and verified them to DIN 743.
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