Progressive vs Transfer Dies for Stamped Parts
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Most stamped metal parts need several operations: blanking, piercing, forming, trimming. The die type decides how the part moves between them.
Progressive dies
A coil of strip feeds through one die with a series of stations. Each press stroke advances the strip one step and performs every station's operation at once, and the part stays attached to the strip by a carrier until the last station cuts it free. One part comes off every stroke.
- Fast: small parts can run at very high stroke rates.
- One die, one press, little handling.
- Best for small to medium parts like brackets, clips and terminals at high volume.
- Limited by the carrier: deep draws and large parts are hard to keep attached to the strip, and the carrier is scrap.
Transfer dies
The blank is cut free first, and transfer fingers or rails move it from station to station inside the press. Because the part isn't tied to a strip, it can be turned, drawn deeply and formed from more directions.
- Handles larger and deeper parts than a progressive die.
- Can use material better on some parts, since blanks are nested on the coil instead of sharing a carrier.
- Slower than a progressive die, and needs a transfer press or a transfer system.
Line dies
For large parts like body panels, each operation is a separate die in its own press, with robots or automation moving the panel down the line. It's the most flexible setup and the most expensive, and it's standard for large automotive panels.
Single-station and compound dies
For low volumes, a compound die blanks and pierces in one hit, and simple dies can be run one operation at a time. The tooling is cheap; the labor per part is high.
How to choose
| Die type | Part size | Volume | Notes |
|---|---|---|---|
| Progressive | small to medium | high | fastest, carrier scrap |
| Transfer | medium to large, deep draws | medium to high | more forming freedom |
| Line dies | large panels | high | most expensive setup |
| Single or compound | any | low | cheap tooling, slow |
Strip layout matters as much as die type. How parts nest on the coil decides how much material becomes scrap, and material is usually the largest cost in a stamped part. Ask for the strip layout and material utilization with the quote.
We design and build stamping dies, with forming simulation during die design. See tooling.