How do I decide whether to recondition a tool or scrap it for carbide value?

Compare the fully loaded reconditioning cost against the tool's remaining value. The Scrap Vs Recondition Decision calculator weighs Cost Per Restored Tool (grind time, wheel, coating, inspection) against the Carbide Recovery Value you would get by selling the worn carbide. If restoring the tool costs more than a new one minus recovery value, or the Regrind Yield on that geometry is low, scrap it. Chipped flutes and short remaining stub length usually push the decision toward recovery.

How do I price a regrind job so the margin holds?

Start with Cost Per Restored Tool, which sums Sharpening Cycle Time labor, Grind Wheel Consumption, coating, and inspection. Layer in Pickup Route Cost and Delivery Route Cost per tool across the batch. The Repair Margin calculator then shows your markup at a given price, and the Price List Calculator sets published tiers by tool type and diameter. Aim to keep the customer's regrind price well under new-tool cost so the ROI still favors reconditioning.

What sharpening cycle time should I quote for a batch of end mills?

Build it from the operations, not a guess. Edge Prep Time, Flute Grind Time, and the Sharpening Cycle Time calculator give per-tool minutes by diameter, flute count, and number of passes. Multiply across the batch and add fixture setup and Inspection Queue Time. A 1/2 inch four-flute carbide end mill typically runs a few minutes of active grind, but heavy chip damage adds passes and wheel wear that stretch both time and cost.

How do I calculate technician utilization and batch capacity in the grinding room?

Technician Utilization compares productive grind hours against paid hours, exposing idle time from setups, queue waits, and inspection bottlenecks. Batch Queue Capacity tells you how many tools your machines and staff can clear per shift given average Sharpening Cycle Time. Pair the two with Inspection Queue Time to find the real constraint. If inspection is the bottleneck, adding a grinder will not shorten Customer Turnaround Time.

How much does grinding wheel consumption add to per-tool cost?

The Grind Wheel Consumption calculator estimates wheel wear per tool from material, pass count, and infeed, then divides wheel cost across the tools it dresses. Hard carbide and heavily damaged edges wear diamond and CBN wheels faster, raising cost per tool. Track this alongside Flute Grind Time so you see both labor and consumable cost. On difficult batches, wheel cost can rival labor and materially change your Repair Margin.

How is coating rework cost handled when a reground tool needs recoating?

Reground tools usually need the old PVD or CVD coating stripped and reapplied. The Coating Rework Cost and Coating Batch Size calculators spread the coating run's fixed cost across the tools in the batch, so a full batch lowers per-tool coating cost while a half-empty run raises it. Factor Warranty/Rework Cost too, since a coating that fails adhesion after regrind means redoing the job and eats directly into margin.

Manufacturing calculator category

Tool Sharpening, Reconditioning & Industrial Repair Services calculators

This category covers the numbers behind running a cutting-tool regrind and industrial repair shop, from the grinding room to the coating batch to the pickup truck. It is for shop owners, service managers, and grinding technicians who need to price jobs, plan capacity, and decide when a tool is worth saving. Every calculator here targets the specific economics of turning a worn end mill or drill back into a sellable tool.

What this hub covers

Calculators for cutting-tool regrind and industrial repair shops covering sharpening cycle time, regrind yield, carbide recovery, coating rework, technician utilization, and repair margin.
Browse tool sharpening, reconditioning & industrial repair services calculators for manufacturing planning, quoting, quality, capacity, and operations decisions.

Best calculators in this category

Sharpening Cycle Time: Sharpening Cycle Time tells a tool room how many hours a batch of drills, end mills or inserts will actually tie up a CNC grinder once handling and setup are folded in.
Tool Life Extension ROI: Tool Life Extension ROI answers the capital question behind any reconditioning or coating program: how fast does spending on regrinding, recoating or an in-house grinder pay for itself.
Grind Wheel Consumption: Grind Wheel Consumption estimates how many grinding wheels a reconditioning run will actually burn through once real-world losses are included.
Coating Rework Cost: Coating Rework Cost totals what it costs to strip and recoat a batch of tools after regrinding, loading a per-tool rate for coating rejects and adding a fixed setup charge.
Inspection Queue Time: Inspection queue time tells a reconditioning shop how many hours a backlog of returned tools will sit before it clears the incoming-inspection station.
Pickup Route Cost: Pickup route cost captures what it actually costs a sharpening service to collect used tools from customer sites and bring them back to the shop.
Delivery Route Cost: Delivery route cost is the return leg of a reconditioning service's logistics: what it costs to get sharpened, coated tools back to the customer's floor.
Scrap Vs Recondition Decision: The scrap-versus-recondition decision score helps a sharpening shop decide, tool by tool, whether a worn cutter is worth regrinding or should be scrapped.
Technician Utilization: Technician utilization measures how much of a sharpening technician's paid time is spent on billable reconditioning work, grinding endmills, regrinding drills, re-tipping saw blades, versus setup, waiting on incoming freight, or idle bench time.
Repair Margin: Repair margin is the profit left after you subtract the full cost of reconditioning a tool from the price you charge the customer.
Cost Per Restored Tool: Cost per restored tool is the fully loaded cost of bringing one worn cutting tool back to spec, including per-tool grinding cost adjusted for how much of that variable cost actually applies, plus the fixed setup and overhead spread across the run.
Carbide Recovery Value: Carbide recovery value is the money reclaimed from worn and broken carbide tooling by selling scrap tungsten carbide to a reclaimer, after accounting for the clean-yield percentage that survives sorting and the fixed cost of collecting it.

Common manufacturing problems solved

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Category questions

How do I decide whether to recondition a tool or scrap it for carbide value? Compare the fully loaded reconditioning cost against the tool's remaining value. The Scrap Vs Recondition Decision calculator weighs Cost Per Restored Tool (grind time, wheel, coating, inspection) against the Carbide Recovery Value you would get by selling the worn carbide. If restoring the tool costs more than a new one minus recovery value, or the Regrind Yield on that geometry is low, scrap it. Chipped flutes and short remaining stub length usually push the decision toward recovery.
How do I price a regrind job so the margin holds? Start with Cost Per Restored Tool, which sums Sharpening Cycle Time labor, Grind Wheel Consumption, coating, and inspection. Layer in Pickup Route Cost and Delivery Route Cost per tool across the batch. The Repair Margin calculator then shows your markup at a given price, and the Price List Calculator sets published tiers by tool type and diameter. Aim to keep the customer's regrind price well under new-tool cost so the ROI still favors reconditioning.
What sharpening cycle time should I quote for a batch of end mills? Build it from the operations, not a guess. Edge Prep Time, Flute Grind Time, and the Sharpening Cycle Time calculator give per-tool minutes by diameter, flute count, and number of passes. Multiply across the batch and add fixture setup and Inspection Queue Time. A 1/2 inch four-flute carbide end mill typically runs a few minutes of active grind, but heavy chip damage adds passes and wheel wear that stretch both time and cost.
How do I calculate technician utilization and batch capacity in the grinding room? Technician Utilization compares productive grind hours against paid hours, exposing idle time from setups, queue waits, and inspection bottlenecks. Batch Queue Capacity tells you how many tools your machines and staff can clear per shift given average Sharpening Cycle Time. Pair the two with Inspection Queue Time to find the real constraint. If inspection is the bottleneck, adding a grinder will not shorten Customer Turnaround Time.
How much does grinding wheel consumption add to per-tool cost? The Grind Wheel Consumption calculator estimates wheel wear per tool from material, pass count, and infeed, then divides wheel cost across the tools it dresses. Hard carbide and heavily damaged edges wear diamond and CBN wheels faster, raising cost per tool. Track this alongside Flute Grind Time so you see both labor and consumable cost. On difficult batches, wheel cost can rival labor and materially change your Repair Margin.

Last reviewed 2026-05-12.