Tool Sharpening, Reconditioning & Industrial Repair Services worked example

Flute Grind Time at 7.2% wheel dress & setup allowance: a worked example

This worked example runs the flute grind time numbers for a tougher week than the baseline: 7.2% wheel dress & setup allowance instead of the typical 10%. Flute grinding is the heavy-metal-removal step of reconditioning — a 5-axis CNC tool grinder restores the flute profile, primary and secondary reliefs, and cutting geometry on worn endmills, drills, and reamers.

The inputs for this scenario

  • Flutes to regrind this batch: 120 units (held at the documented default)
  • Flutes ground per hour on the CNC grinder: 12 units / hr (held at the documented default)
  • Wheel dress & setup allowance: 7.2 % (the input this scenario stresses; the baseline uses 10)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base flute grind time time = required work ÷ processing rate.
  • Adjusted run time works out to 10.72 hr at these inputs, and this is the headline figure for the scenario.
  • Base run time works out to 10 hr at these inputs.
  • Allowance applied works out to 7.2 % at these inputs.
  • Process rate works out to 12 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where wheel dress & setup allowance sits at 10% and the headline result is 11 hr, this scenario comes in 2.55% below the baseline at 10.72 hr.
  • Use it when loading the CNC grinder, quoting regrind turnaround, or checking grinder capacity against incoming volume. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Adjusted run time: 10.72 hr (headline result)
  • Base run time: 10 hr
  • Allowance applied: 7.2 %
  • Process rate: 12 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Flute Grind Time calculator, set wheel dress & setup allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.