The hard constraint on a copper band press isn't tonnage, it's alignment. Twelve hydraulic cylinders have to apply exactly equal radial force into a shell's groove at the same instant, because any cylinder that's even slightly out of alignment or under-delivering force produces a band that's seated unevenly -- and that shows up later as inconsistent barrel engagement and flight instability.
Neometrix's Copper Band Press for Ammunition Shell solves the alignment problem structurally before it solves it electronically: the twelve cylinders, spaced 30° apart in a single horizontal plane, are fabricated in one piece with no welding and bolted to a rigid one-piece frame with machined mounting surfaces. Only after that mechanical precision is locked in does a Siemens S7-300 PLC and 12-inch HMI take over, adjusting radial force digitally from 250 to 1000 tons at 270 kg/cm² working pressure (300 kg/cm² max).
The PLC layer also handles indexing -- rotating the shell body 15° to 90° per step, one to eleven steps per cycle, with 0-15 second adjustable dwell time between passes, for shell and band combinations that need more than one synchronous pressing pass to fully seat. A minimum 1500-litre hydraulic reservoir, piston-type pumps, a heat exchanger, and metered piston lubrication support continuous-duty operation at a production floor of at least 20 band-pressed bodies per hour, with load/unload capped at 25 seconds per step to keep the line moving predictably.
Full writeup: https://neometrixgroup.com/products/copper-band-press-for-ammuniton-shell
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