Two non-contacting, claw-type rotors in an oil-free chamber provide the vacuum for the Busch MM Series (www.buschpump.com) dry vacuum pump. Busch engineers say it's for applications where dust particles are present. The non-contacting design means no wear in the pumping chamber, they say, so maintenance is low.
An in-depth survey of 700 current and future users of 3D printing holds few surprises, but results emphasize some major trends already in progress. Two standouts are the big growth in end-use parts and metal additive manufacturing (AM) most respondents expect.
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