Soft-goods projects—from therapy packs to straps, liners, foam inserts, leathers, canvas, nylons and much more—often come down to one early decision: how will we cut it? The two most common routes are steel die cutting and electric knife cutting. Both can produce accurate parts; the “best” choice depends on your tolerances, volumes, materials, budget, and timeline.
Quick answer
- You need repeatable parts at medium to high volumes (low hundreds to millions).
- Profiles are consistent and don’t change often.
- You want the lowest cost per part after setup.
- Set-up costs are usually in the low hundreds range and not thousa.
- You’re in prototype/low-volume mode (a few to a few dozen).
- Designs change frequently or you need multiple revisions.
- Large parts or long nested shapes benefit from tool-less programming.
- You want to avoid the upfront cost/lead time of a steel die.
Side-by-side comparison
| Factor | Die Cutting | Electric Knife Cutting |
|---|---|---|
| Tolerances | Typically ±0.015"–±0.030" depending on material, die quality, and stack height. | Greater tolerance allowances. |
| Edge quality | Clean, slightly compressed edges; Typically, does not impact tolerances. | Very clean knife edge. Minimal compression. |
| Part size/geometry | Excellent for repeated 2D profiles; radii limited by die width. | Excellent for complex shapes, internal cutouts, and long runs without tooling limits. |
| Setup cost | Requires a steel die; one-time tool cost. | No hard tooling. |
| Lead time to first parts | Die build + setup (Typically, 5-15 days). | Same day or next day, depending on job scheduling. |
| Lowest at volume; amortizes die cost quickly. | Higher per-part cost, but great for short runs and frequent revisions. | |
| Best for volumes | Low hundreds to millions. | A few to a few dozen (and for frequent design changes). |
| Materials we see | Virtually unlimited soft goods. | Virtually unlimited soft goods. |
Engineering considerations
- Nesting & yield: Both methods support tight nests to reduce scrap. Knife cutting favors quick nest changes during prototyping.
- Holes & slots: Small features are easier to stabilize with a die. Very small radii may require tighter-tolerance dies.
- Registration: Printed marks? We can register cuts to graphics—talk to us about your tolerance window.
- Quality checks: We gauge early parts against your drawings and lock specs before scaling volume.
Cost & timeline
Tooling adds a one-time cost for die cutting, but your per-part price drops rapidly at volume. Electric knife avoids tooling, so it’s ideal when you’re still iterating or ordering small batches. If you expect to reorder steadily, a die often pays for itself within the first production run.
What we recommend
If you’re unsure, we often start with rapid knife-cut prototypes to validate proof of concept. Once the profile is stable, we’ll quote a steel die for production to bring your unit cost down. This hybrid approach gets you speed now and efficiency later.
FAQ
Can you switch methods mid-project? Yes. We frequently move validated knife-cut parts into die cutting for production scale.
What file types do you accept? PDF with dimensions. However, we prefer a physical sample we can reverse-engineer.
Do you handle kitting and sewing after cutting? Yes—see Assembly & Kitting and Contract Stitching.
Related: Sampling • Material Sourcing • Consulting