Choosing a progressive die stamping partner commits you to more than a piece price. The die will make your part for years, and the shop that designs, builds and runs it shapes your cost, your quality and how quickly a problem gets resolved. Buyers comparing stamping shops usually look for domestic reliability, volume capacity and technical competence. The less obvious question is who builds the die.
Progressive die stamping pays off when annual volume is high enough to recover the cost of the die through a lower piece price, and when the part’s features can be laid out on a strip that feeds cleanly through each station. The partner matters as much as the process: a shop that designs and builds its own dies can work through the strip layout, the DFM and the break-even math with the same people who will run the tool.
At a Glance: Outside Toolmaker vs. In-House Tooling
| Question | Dies sourced from an outside toolmaker | Perry Tool & Die (in-house tooling) |
| Who designs and builds the die | A separate tool shop | Our own toolmakers, under the same roof as the presses |
| Where a die question goes | From the stamping shop to the toolmaker and back | To the people who built the die |
| Engineering input | Depends on how the two shops divide the work | DFM review of the print and strip layout before the tool is cut |
| A change to an existing die | Typically a purchase order and a slot in the toolmaker’s schedule | A case-by-case call, made against your part and the condition of the tool |
| Who owns an out-of-spec part | Shared between two companies | One shop owns the design, the tool and the run |
1. Two Ways a Stamping Shop Can Be Set Up
Some stamping operations are built around press time. They run large volumes of identical parts and buy their progressive dies from outside toolmakers, and at the right volumes that model works well. The tradeoff is that the people who design the die and the people who run it work for different companies.
Perry Tool & Die is set up the other way. We’re a Broomfield, Colorado shop that designs and builds its own dies and runs its metal stamping on 60, 80 and 110 ton presses. Because we also run fiber laser cutting, a part can start as a laser-cut prototype and move to a progressive die without changing shops.
2. How Does a Progressive Die Make a Part?
A coil feeds into the press, and each stroke advances the strip one step, called the pitch. Stations along the die pierce, form and cut in sequence, so every stroke works on several parts at different stages and a finished part comes off the end of the strip. That’s where the economics come from: many operations per stroke, on one press, with one die.
Why the Strip Layout Drives Your Cost
The strip layout is the blueprint of a progressive die: which station makes which feature, how the part stays attached to the carrier, and how much of the coil ends up as scrap. Our precision engineering team works through grain direction and springback for your material at this stage, and nests the part to keep the scrap web small. Over a long run, scrap is paid for on every stroke, so material yield gets decided here, not on the press.
3. Why Does It Matter Who Builds the Die?
This is the biggest difference between shops that look alike on a capability list. Some stampers focus on running presses and buy the design and build of their progressive dies from outside vendors. We build the dies we run.
- Designed for the press: We design the die around the press it will run on, rather than handing a print to a toolmaker who will never run it.
- Revisions start with the people who built it: If a run turns up a problem in the die, the first conversation is with the toolmakers who designed it, not a vendor’s queue. Whether a given change is practical on the existing tool is a case-by-case call, made against your part and the condition of the tool, so contact us to discuss it.
4. What Does the Die Design Decide?
Press speed only helps if the die runs clean, and much of that is settled before the die is built:
- Slug control: When a punched slug lifts back out of the die with the punch, it can mark the next part or damage the tool. Punch geometry and clearance are the usual controls, which makes slug pulling a die design question, not just a press setting.
- Forming in the die: Forms, bends and shallow draws can happen at stations along the strip, which can remove a secondary operation. Each station adds die cost and complexity, so the real question is whether the operation it replaces costs more over the life of the program.
- Draws and springback: How metal flows into a drawn feature, and how far a bend springs back, depends on the alloy and temper. Those allowances belong in the strip layout, where they’re cheap to adjust.
5. Which Materials and Thicknesses Fit?
We stamp cold rolled steel, stainless, aluminum and copper on presses from 60 to 110 tons. In steel and stainless we run up to 10 gauge (0.1345″ and 0.1406″). Each family behaves differently in a progressive die:
- Cold rolled steel: Forgiving to form, and the usual baseline for die wear.
- Stainless: Work hardens as it forms and is harder on cutting edges, which affects clearances and the choice of die steel.
- Aluminum: Springs back more than steel after a bend and can gall, so bend allowances and surface finish need attention.
- Copper: Soft and ductile, so burr height and part handling get extra attention.
If your part is thicker than 10 gauge, it isn’t a stamping job for our presses, and we’ll tell you so. For a specific alloy or temper, ask us about your run.
6. How Are Progressive Stamped Parts Inspected?
A progressive die makes a part with every stroke, so a dimension that starts to drift can produce a lot of bad parts if inspection waits until the end of the run. We inspect after each step, with sign-off from the operator and from QC before parts move on.
We typically hold ±0.005″. If a feature on your print needs to hold that, flag it in the RFQ so we can look at it while the strip layout is still on paper.
7. When Does Progressive Tooling Pay Off?
The biggest hurdle in moving a part from laser cutting to progressive stamping is the upfront cost of the die. The way to judge it is break-even volume, not the tooling price on its own.
The Break-Even Formula
To find the quantity at which a progressive die pays for itself, compare it against the process you would use without it:
Break-even quantity = Tooling cost ÷ Savings per part
- Tooling cost: the one-time price of the progressive die.
- Current piece price: what the part costs today from a laser-cut, punched or prototype process.
- Stamped piece price: the per-part price once the die is running.
- Savings per part: the current piece price minus the stamped piece price.
Above the break-even quantity, every additional part costs less stamped. Run the formula against the expected life of the program, not a single purchase order: a die that doesn’t pay back on the first order can still be the cheaper route across the whole program.
One more input belongs in that comparison: how the die will be looked after over the life of the program. Ask how upkeep and changes are handled and billed, from us or from anyone else, so the stamped piece price you plug in is the one you’ll actually pay.
8. DFM Rules for Progressive Dies
These design points come up early in a progressive die review, and each one is cheaper to settle on the print than in the steel:
- Carrier strip: Leave room for small tabs that hold the part to the carrier until the final cutoff station.
- Pilot holes: The strip needs pilots to locate it at each station, usually at least two. If your part has no suitable holes, pilots can go in the scrap web instead.
- Hole-to-edge distance: A common rule of thumb is to keep a hole at least 1.5 times the material thickness from an edge, so the edge doesn’t bulge when the hole is punched.
Send a STEP, DXF or SolidWorks file with the print, and we’ll flag anything on this list during the review.
9. Why Does Location Matter?
If your assembly plant is on the Front Range, distance affects more than freight.
- Face-to-face engineering: Solving a stamping problem is faster when everyone is looking at the same strip. If you want to see the shop before you commit, ask us.
- Delivery distance: Freight time is inventory. Parts that ship from the Front Range rather than from overseas or across the country shorten the gap you have to cover with stock sitting on your own floor.
Choosing Your Partner
The right progressive die partner can tell you, before the tool is cut, whether your volume justifies a die, what in the print will drive its cost, and who will answer when the die needs attention. Over a long program, those answers matter more than any single quote.
Send us the print, the material and your annual volume, and we’ll work through the break-even math with you and tell you whether a progressive die is the right call. Request a quote or call (303) 460-1494.
Frequently Asked Questions
What is progressive die stamping?
A progressive die performs several operations in sequence as the strip advances through the press, so one press stroke moves every station at once. It is the right process when volume is high enough to amortize the tooling.
At what volume does progressive tooling pay off?
It depends on part complexity and how many operations the die replaces. Send us your annual volume and the print and we will tell you honestly whether progressive tooling or prototype tooling is the better economics for your program.
What should I look for in a progressive die stamping partner?
Whether they build the die themselves. A progressive die usually needs tuning during tryout, and a shop that designed and built it can make those calls without waiting on an outside toolmaker. Then compare on press capacity, material range, and how parts are inspected.
Further reading: Metalworking: Sheet Forming (ASM Handbook, Vol. 14B, ASM International).
