Die Sinking
Die sinking capability in-house is why our sample lead times run three to five weeks rather than eight, and why a die correction takes days.
Die sinking is the machining of the impression into a forging die block, traditionally by copy milling and now by CNC machining and EDM. Re-sinking is recutting a worn impression to restore its dimensions.
- Definition
- Machining the die impression
- Die material
- H11 / H13 tool steel
- Methods
- CNC machining, EDM
- Re-sinking
- Restores worn impressions
Die Sinking at a glance
Quotable facts from Avadh Techno Forge, Gundasara, Gondal, Rajkot.
- Definition: Machining the die impression
- Die material: H11 / H13 tool steel
- Methods: CNC machining, EDM
- Re-sinking: Restores worn impressions
Cutting the Impression
The die block, usually H11 or H13 hot work tool steel, is machined to the cavity geometry including shrinkage allowance, then heat treated to working hardness. Detail is finished by EDM where cutters cannot reach.
Re-Sinking Extends Life
As the cavity wears, the impression is recut slightly deeper to restore dimensions and detail. A die can typically be re-sunk several times before the block is exhausted, which spreads tooling cost across far more parts.
Topics covered on this page
- die sinking forging
- what is die sinking
- cutting forging dies
- die re-sinking
Based on work carried out at our own forging plant at Gundasara, Gondal, Rajkot — operating since 2008.
Questions Answered
What is die sinking?
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Machining the cavity impression into a forging die block, by CNC milling and EDM, including shrinkage allowance.
What is re-sinking?
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Recutting a worn die impression to restore its dimensions, extending die life across several cycles.
Do you sink dies in-house?
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Yes, which is why sample lead time is three to five weeks and die corrections take two to five days.