How do you calculate sizing press capacity?

Multiply parts per stroke by available strokes for gross capacity, then multiply by uptime and yield. With 4 parts/stroke, 480 strokes, 90% uptime and 97% yield you get 1,920 gross and about 1,676 good parts.

What is the difference between gross and good capacity?

Gross capacity assumes every stroke runs and every part passes. Good capacity subtracts downtime and scrap. In the example, 192 parts are lost to uptime and about 52 to yield, dropping 1,920 gross to 1,676 good.

What is a good uptime for a sizing press?

Well-run repress cells often see 85 to 92% uptime; below 80% usually points to tooling changeovers, feed jams, or ejection problems worth a Pareto. The example uses 90%, which costs 192 parts of the 1,920 gross.

How does yield affect coining output?

Yield captures cracked, under-filled, or out-of-tolerance parts scrapped after sizing. Even a strong 97% yield removes about 52 parts here. Small yield gains compound because they act on gross capacity after uptime.

Parts per stroke vs available strokes, which should I improve first?

Parts per stroke is a tooling and multi-cavity decision; strokes are a speed and run-window decision. If the die can hold added cavities without losing tolerance, more parts per stroke usually beats chasing marginal speed.

How many strokes are available in a shift?

Available strokes is your planned run window at press speed minus setup. A press at 60 strokes/min running roughly 8 minutes of net production yields the 480 strokes used here; measure your own net run time to be accurate.

Powder Metallurgy & Sintered Parts calculator

Sizing Press Capacity Calculator

Sizing (or coining) press capacity is the number of good, dimensionally corrected sintered parts a repress operation can deliver in a given window. Production planners and cell leaders in powder metal shops use it to confirm the sizing press can keep up with the sinter furnace and the downstream steam-treat or machining stations. It matters because sizing is often the bottleneck that sets tolerance and final dimensions, and a press that looks fast on gross strokes can fall short once uptime and scrap are counted. This calculator separates gross capacity from the good-part output you can actually promise.

What this calculator does

Sizing (or coining) press capacity is the number of good, dimensionally corrected sintered parts a repress operation can deliver in a given window.
Use it when sizing press capacity in powder metallurgy and sintered parts is being asked to take on more work and you need to know if there is room.
It multiplies parts per stroke by available strokes for gross capacity, then applies uptime and yield to give good output plus the parts lost to downtime and scrap.

Formula used

Gross sizing press capacity capacity = units per cycle × available cycles
Good capacity = gross capacity × uptime × yield

Inputs explained

Parts sized per press stroke:
Available press strokes in the window:
Sizing press uptime:
Post-size yield:

How to use the result

Use it when balancing a sizing or coining press against furnace output or a shipping commitment for a shift, day, or week.
It uses steady average uptime and yield, so it will overstate output if you have long chronic stoppages or a yield problem that worsens as tooling wears.

Current U.S. benchmarks

The producer price index for steel mill products stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. Quotes priced off last quarter's material cost miss this move.
U.S. iron and steel imports ran $2.1B in May 2026 (Census International Trade). The U.S. ran a trade deficit of $0.4B in the category that month. Import volumes are the pressure gauge behind tariff and reshoring decisions.

Common questions

How do you calculate sizing press capacity? Multiply parts per stroke by available strokes for gross capacity, then multiply by uptime and yield. With 4 parts/stroke, 480 strokes, 90% uptime and 97% yield you get 1,920 gross and about 1,676 good parts.
What is the difference between gross and good capacity? Gross capacity assumes every stroke runs and every part passes. Good capacity subtracts downtime and scrap. In the example, 192 parts are lost to uptime and about 52 to yield, dropping 1,920 gross to 1,676 good.
What is a good uptime for a sizing press? Well-run repress cells often see 85 to 92% uptime; below 80% usually points to tooling changeovers, feed jams, or ejection problems worth a Pareto. The example uses 90%, which costs 192 parts of the 1,920 gross.
How does yield affect coining output? Yield captures cracked, under-filled, or out-of-tolerance parts scrapped after sizing. Even a strong 97% yield removes about 52 parts here. Small yield gains compound because they act on gross capacity after uptime.
Parts per stroke vs available strokes, which should I improve first? Parts per stroke is a tooling and multi-cavity decision; strokes are a speed and run-window decision. If the die can hold added cavities without losing tolerance, more parts per stroke usually beats chasing marginal speed.

Last reviewed 2026-05-12.