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Progressive die vs compound die
The progressive die vs compound die question comes down to how many stations you want inside one tool. A progressive die spreads the work along a line of stations. Each stroke moves the strip forward by one pitch. A compound die does all the work at one station in a single stroke. Therefore the choice decides your output rate, your tooling cost and your scrap plan.
The short answer
| Point | Progressive die | Compound die |
|---|---|---|
| Stations in the tool. | Several, in a line. | One, with all punches working together. |
| Strokes per part. | One per station, so several strokes. | One stroke. |
| Strip movement. | Advances one pitch each stroke. | Stays still. |
| Output rate. | High on long runs. | Lower, because each part needs a full stroke. |
| Die complexity. | Higher, and it grows with station count. | Lower station count, but heavy tonnage. |
| Tonnage. | Spread across stations. | Concentrated in one hit. |
| Flatness after the cut. | Usually easier to hold. | Harder, because cutting is simultaneous. |
| Best fit. | High-volume parts with several features. | Flat parts that need a clean outline and a hole. |
How each die works
First, a progressive die carries the strip through a sequence of stations. Station one pierces the pilot holes. Then the strip indexes forward by one pitch. Later stations notch, form, bend and finally cut the part free. Therefore each stroke completes one stage, and the tool delivers a finished part on every stroke once it is fully loaded.
By contrast, a compound die works in the opposite way. All the punches sit in one plane and strike at the same time. The outer punch cuts the outline while the inner punch makes the hole. Therefore one stroke produces one finished part.
Output rate and press tonnage
Therefore output rate follows from the station count and the stroke. A progressive die runs continuously, so it suits long, stable runs. A compound die needs one stroke for every part, so it runs slower on the same press.
However, tonnage follows the opposite pattern. A progressive die spreads the work across stations, so each station takes a share of the load. A compound die concentrates the whole cut in one hit, which pushes the tonnage up for the same part.
We run more than 40 presses from 80T to 400T, and our largest single-station press reaches 400 tonnes. In addition, we build progressive dies for high-volume runs. Therefore a die that needs a heavy single hit and a die that needs many stations can both run in our press shop. Most deep draws need 160T to 400T, and a shop limited to the 60T to 160T band cannot hold a 400T-class draw.
Tooling cost and lead time
A progressive die costs more to build, because it carries more stations and more timing. However, it pays that back on a long run through a lower cost per part. A compound die costs less to build, so it suits a shorter run or a simpler part.
Lead time follows the same logic. More stations mean more design and more tryout before the die is ready. Therefore a compound die usually reaches first article sooner. A progressive die takes longer to build but produces faster once it runs.
Flatness, tolerance and part handling
A compound die cuts the whole outline in one hit. The part then springs as the stress releases, so flatness is harder to hold. A progressive die cuts in stages, which usually makes flatness easier to control. Therefore check flatness early if your part sits against a flat face.
Tolerance follows the die, not the process choice. Stamping tolerances are die-controlled, and ISO 2768-1 sets the four general classes (fine, medium, coarse and very coarse) that many drawings rely on for linear and angular dimensions. So agree the class with your drawing before the die is cut.
Where each die wins
First, choose a progressive die when the part carries several features and the annual volume is high. It wins on output rate, on flatness and on cost per part over a long run. Brackets, housings, connectors and formed plates sit here.
By contrast, choose a compound die when the part is flat, the outline is simple, and the volume does not justify a long tool. It wins on tooling cost and on the time to first article. Simple washers, plates and flat covers sit here.
In short, the die follows the volume. A stable, high-volume part rewards a progressive tool. A simple part on a shorter run rewards a compound tool.
Die design and maintenance at our plant
In short, we design and build our dies in house, which keeps the geometry and the tryout in one place. We also maintain them in house, so a worn punch is replaced without a new supplier and a new lead time.
Our site covers 9,000 square metres and runs to ISO 9001:2015, and we have built metal parts since 1999. Monthly capacity runs above 500,000 pieces, with a typical sample lead time of 72 hours. Send the part drawing and the annual volume, and we will recommend progressive die and compound die options with the stations, the tonnage and the tool life for each.
Frequently asked questions
These are the questions buyers ask most often about this comparison.
What is the difference between a progressive die and a compound die?
A progressive die spreads the work across a line of stations and advances the strip by one pitch each stroke. A compound die does all the cutting at one station in a single stroke.
Which die gives the higher output rate?
The progressive die, on a long run. It works continuously once the strip is loaded. A compound die needs one full stroke for every part, so it runs slower on the same press.
Which die needs more press tonnage?
The compound die, for the same part. It concentrates the whole cut in one hit, while a progressive die spreads the load across its stations.
Can you build both types of die in house?
Yes. We design, build and maintain dies in house, so tryout and maintenance stay in one place. Send the drawing and the annual volume for a recommendation.
