Custom tooling and regrinding: how to specify the request
Exactalloy · Updated
Custom tools are quoted from a dimensioned drawing or a sample, and regrinding is quoted from the tool's condition. Sending the right information first avoids a quotation that cannot be manufactured.
What a custom tool enquiry must contain
A photograph alone cannot be manufactured from. Provide a dimensioned drawing or a physical sample together with the application.
- Drawing in DWG, PDF or STEP, with units and tolerances.
- Critical features, form angles and any clearance limits.
- Workpiece material, measured hardness and target tool life.
- Machine and holder interface, and required quantity.
Feasibility and lead time
Feasibility depends on form complexity, tolerance and batch size. Complex forms and tight tolerances need more process steps and therefore longer lead time.
- Samples typically require around 5–10 working days.
- Batch production typically follows 12–18 working days after sample approval.
- Very fine tolerances or unusual forms may need a feasibility review first.
- Sample charges may be credited against the batch order depending on process.
What regrinding can restore
Regrinding renews the cutting edge, but it removes material. Which dimensions can be recovered depends on the remaining flute length and the extent of damage.
- Describe the tool type, material and original dimensions.
- Describe the wear: even wear, chipping, coating loss or breakage.
- State the quantity and whether mixed sizes can be processed together.
- Typical cost is 30–50% of a new tool, with several regrinds possible per tool.
Acceptance and documentation
Agree what will be measured before the work starts, so the result can be checked objectively.
- Agree the restored dimensions and the acceptance criteria up front.
- Request inspection data for runout, edge radius and any coating work.
- Keep the approved drawing or sample as the reference for repeat orders.