Start with the news release Huco Dynatork launches piston air motor from Huco Dynatork, which we summarised at the time by saying "The Huco Dynatork air motor is a piston air motor as opposed to a vane air motor and the company claims that this distinction provides important energy-saving benefits.". Several months prior to that, we featured the news release Miniature leadscrews handle precision tasks from Kerk Motion Products: "Small-diameter precision-rolled leadscrew assemblies provide reliable precision motion control at up to one-tenth of the cost of miniature ballscrews.".
 
In April 2008, we covered the news from Huco Dynatork - take a look at Internal tubing provides robust air motors which says: "The floating piston design of the Huco Dynatork air motor transmits the maximum torque on start-up, which can be adjusted with standard air flow valves. ".
 
Take a look also at the news release from Mitutoyo (UK), Digital micrometer provides measuring speed boost, as well as Ceramic actuators clean up on medical applications from PI (Physik Instrumente), and Low-cost gearmotors are reliable and precise from Micro-Drives.