Trim Press Tonnage Calculator

Die casting · Forging · Sheet metal trimming & blanking
1Material ultimate shear strength
No shear data? Use about 0.6–0.8 × ultimate tensile strength. Use the high end for hard or high-strength alloys.
2Trim line & thickness
in
in
Pierced holes, windows, gates and overflows trimmed in the same stroke
3Die & safety factors
×
Multi-cavity trim dies cut every part at once
10%
Force to strip the part or scrap off the punch, typically 5–20%
20%
Covers dull tooling, material variation and off-center loads. 20–30% is common for production.
Required press capacity
—
US TONS
Press class recommendation ≤ 80% utilization target
Engineering notes
Method: F = cut length × thickness × shear strength × parts per stroke × (1 + stripping) × (1 + safety margin). Shear strengths are typical room-temperature values from published handbook data (hot-trim values are approximate). Use certified mill or supplier data for final design. Results are engineering estimates, not a substitute for press-builder or die-designer review.
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