Deep Drawing vs Stamping: Choosing the Right Process for Brass Parts
Stamping and deep drawing are often mentioned together, but they solve different problems. Here is how to tell which one your brass part needs.
Buyers often use "stamping", "pressing" and "deep drawing" interchangeably. In a factory they mean different things, and the difference affects tooling cost, lead time and what shapes are possible. This article explains both processes for brass components and shows when they are used together.
What Is Stamping?
Stamping (also called pressing) covers operations that cut or form sheet metal, mostly without stretching it into deep shapes:
- Blanking: cutting a flat outline from strip
- Piercing: punching holes
- Bending and forming: folding the metal along a line
- Coining and embossing: pressing a raised or recessed pattern
Typical stamped brass parts are washers, flat badges, clips, brackets and the flat backs of some buttons.
What Is Deep Drawing?
Deep drawing stretches a blank into a three-dimensional, hollow shape with a punch and die, often over several stages. The result is a seamless cup, shell, cap or sleeve. Snap button caps, eyelet barrels, rivet caps and jean button shells are classic deep drawn brass parts. For a step-by-step explanation, see what is deep drawing?
Side-by-Side Comparison
| Stamping | Deep drawing | |
|---|---|---|
| Shape | Mostly flat or bent profiles | Hollow, seamless, with depth |
| Metal flow | Cut or bent; little thinning | Material flows into the die; the wall is formed |
| Stages | Often one to a few | Usually several draw and redraw stages |
| Tooling | Generally simpler | More complex; radii and clearances are critical |
| Typical brass parts | Washers, flat badges, clips | Caps, cups, shells, eyelets, ferrules |
Most Real Parts Use Both
A single snap button cap shows how the processes combine. The blank is stamped from strip, deep drawn into a cup, trimmed, then embossed with a logo and curled at the edge. All of this can happen in one progressive tool. Eyelets follow a similar route: blank, draw, pierce the base, then form the flange.
So the useful question is not "stamping or deep drawing?" but "how deep and how complex is the part, and how many stages will it need?"
How the Choice Affects Cost
- Tooling: each extra draw stage adds tool cost. A shallower design, or slightly larger radii, can sometimes remove a stage.
- Volume: deep drawing is most economical at volume. Once tooling is made, the part price is low and very consistent.
- Material use: blank layout and trimming allowance affect scrap, which matters with brass.
Design Tips for Drawn Brass Parts
- Use generous inside radii at the base and the flange where the design allows.
- Avoid sharp internal corners in deep sections.
- Specify only the dimensions that are truly critical, and allow normal draw tolerances elsewhere.
- Tell your supplier the final finish early, because plating thickness affects fit.
Ata Buttons designs its own tooling for both stamping and deep drawing. Send us your drawing and we will suggest the most efficient route. Request a quote.
