Metal Spinning Design Guidelines
Metal Spinning Advantages
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- Cold working improves tensile strength
- Forming process strengthens grain structure
- Cost advantages over casting or forging
- Uncomplicated tooling reduces lead times
- Lower cost, lighter weight parts
Metal Spinning Shapes
- Symmetrical circular shapes-cones
- Minimum radii of about 1 to 1.5 times material thickness
Materials
- Church Metal forms material from 24 gage up to 5/16″ thick steel
- Common Steel: Cold rolled, hot rolled, A36
- High Strength Steel: Corten, Exten
- Stainless Steel: 304,316,321,409,430
- Nickel Based Alloys: Hastelloy, Inconel
- Copper and Brass
- Aluminum: O temper, H14, H32, 1100, 6061, 3003, 5052
Tolerances
- The tighter the tolerances of a part the more time and care needs to be taken to achieve those tolerances. The table shows guidelines for the cost conscious, standard commercial parts and specialized parts.
| Cost | Standard | Special | |
|---|---|---|---|
| Up to 6" | +/-.030" | +/-.015" | +/-.002" |
| Up to 12" | +/-.030" | +/-.015" | +/-.005" |
| Up to 24" | +/-.060" | +/-.030" | +/-.010" |
| Up to 36" | +/-.080" | +/-.030" | +/-.015" |
| Up to 50" | +/-.125" | +/-.060" | +/-.030" |
Metal Spinning Design Guideline Resources: http://www.makeitmetal.com/resources/CH9_spin.asp