Metal Spinning
Metal spinning forms round, hollow parts such as cones, domes, bowls and reflectors by pressing a spinning sheet disc against a mandrel with a roller tool. It has low tooling cost and suits prototypes, low to medium volumes and large diameters.
What it is
A flat disc is clamped against a mandrel on a spinning lathe and progressively formed over it with rollers, either manually or on CNC spinning machines. The part takes the mandrel shape without cutting.
Compared with deep drawing, spinning needs only a simple mandrel, so it is economical for smaller quantities and large parts.
Typical applications
- Lighting reflectors and lamp shades
- Cones, hoppers and funnels
- Dished ends and domes
- Cookware and utensils
- Ventilation and ducting parts
Suitable materials
- Aluminium
- Mild steel
- Stainless steel
- Copper and brass
Points to consider
- Only axisymmetric shapes can be spun.
- Wall thickness thins slightly in formed areas.
- Deep drawing is cheaper at very high volumes.
- Trimming and beading can be done on the spinning lathe.
Frequently asked questions
What is metal spinning used for?
Round hollow parts such as reflectors, cones, domes, hoppers and bowls.
Is metal spinning cheaper than deep drawing?
For low to medium volumes, yes, because the mandrel is simpler than drawing dies.
Which metals can be spun?
Aluminium, mild steel, stainless steel, copper and brass are common.