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| | Forging, Casting and CNC Machining |
 | | A CNC machine has a minimum of 6 motors (including some to change tools, and one or more to pump oil and coolant various places). |
 | | If you only plan to build 30 of something, CNC is just the thing for parts with a complicated shape, like that landing gear strut on that fighter. |
 | | If you know that you will be making 50,000 a year, and its always going to be 5 holes in a 110 mm circle, you program the CNC to make a fixture that holds the 5 drill bits in that circle, and has them turn in unison. |
| www.sheldonbrown.com /dp-forging.html (1369 words) |
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