Progressive Lamination Die (auto-interlock)

Selection criteria

Number of stations, regrind interval, stack-height control method.

Supply chain

Dongguan and Shenzhen have lamination die makers, including a Japanese-invested core and die specialist, while Ningbo–Taizhou remains China's largest motor-die belt. Die quality sets burr, stacking factor and core cost over millions of hits — ask for regrind intervals and sample-core reports.

Buyer FAQ

How long does a lamination die last?

Carbide punches and dies typically run 1–2 million strokes between regrinds and tens of millions over their life, depending on steel grade, thickness and lubrication. Tool-steel dies are cheaper but need regrinding far more often.

What is in-die interlocking (auto-stacking)?

Small dimples are punched into each lamination and pressed into the one below inside the die, so cores leave the press already stacked to height. Skew and rotation for stepped or skewed cores can also be done in the die.

What should I ask a die maker for?

The strip layout and material utilisation, burr guarantee and regrind interval, expected stroke rate, and a sample-core inspection report (burr, stack height, stacking factor, slot dimensions).

Where it is used