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Message: <blockquote data-quote="Shadowrider" data-source="post: 3715212" data-attributes="member: 3099">What OHJEEZE said. They make blocks out of ceramic too for the really precise stuff. It's not magnetism at all that does it.Fun fact. Last shop I worked at bought a Mori Seiki CNC jig boring machine that was a factory modified into a 5 axis. It was simply one of their standard models that they added two rotary axes to. The customer spec'd Leica optical scales for feedback to the CNC control on every axis. Leica was and probably still is the best of the best in the world at uber precision movements. They also had cooling AND heating units on the hydraulic, coolant and spindle fluids. They had a warm up program that the customer had to run for 45 minutes to get everything on the machine stabilized to run the parts they were running. The code was still in the control when we received it. I was bored one Saturday and was reading the manuals and shocked at the precision it would do and repeat. Even having been around 5 axis CNC aerospace stuff for years this was mind blowing. The customer that ordered this machine? Boeing Satellite Division. That's who we bought it from.We used it to drill and bore a crapton of locating holes in the engine nozzle rings for all sorts things that attached including the steering brackets that went on the reworked ICBM that was part of the missile defense program. They ended up at ATK in Utah. Our customer was right up Imperial Highway in City of Industry, CA. That place was cool to go visit. Inside the main foyer was a display shelf that wrapped around the room. On that shelf was all sorts of items, some all burnt up, off of the Apollo lunar landing modules. They built a lot of items related to the engine nozzles of about every rocket we've ever used.Sometimes I miss that work, but most times I don't...</blockquote>

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