CNC Machining calculator

Regrind Savings Calculator

Use this calculator to compare a regrind or resharpening program with buying new drills, end mills, reamers, or special cutters. It helps tool crib managers and purchasing teams see whether regrinds reduce tooling cost without creating quality or delivery risk.

What this calculator does

  • Estimate savings from regrinding cutting tools instead of buying replacement tools, after regrind cost and handling burden are included.
  • evaluating whether regrinding cutting tools saves money for a CNC tool family or production program
  • The result shows whether the regrind program is material enough to support purchasing or tool crib decisions.

Formula used

  • Net regrind savings = tools sent for regrind × savings per reground tool + fixed regrind program cost + freight, inspection, and handling burden
  • Savings per reground tool = net regrind savings ÷ tools sent for regrind

Inputs explained

  • tools sent for regrind: Count tools expected to be successfully reground and returned to production use.
  • savings per reground tool: Use new replacement cost minus regrind cost for one usable tool.
  • fixed regrind program cost: Include setup, minimum lot charge, vendor qualification, or program administration cost.
  • freight, inspection, and handling burden: Include shipping, receiving, tool inspection, crib handling, and any re-coating administration cost.

How to use the result

  • Use it when choosing between new tooling, regrind suppliers, coating options, or crib stocking policies.
  • Treat the result as a planning estimate until it is verified against the actual CNC program, machine limits, toolholder rigidity, coolant delivery, workholding, material condition, inspection data, and shop-floor trial results.

Common questions

  • What is the regrind savings calculator for? It estimates the financial benefit of using regrinds instead of new replacement tools.
  • What information should I enter? Use tool count, net savings per tool, and any program or handling costs from the same regrind scenario.
  • What does the result tell me? The result shows whether the regrind program is material enough to support purchasing or tool crib decisions.
  • When is the result only an estimate? Treat the result as a planning estimate until it is verified against the actual CNC program, machine limits, toolholder rigidity, coolant delivery, workholding, material condition, inspection data, and shop-floor trial results.

Last reviewed 2026-05-12.