gear

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In virtually every way it was a petite copy of its older sibling and even used a smaller version of the C8's twin-motor, spur-gear drive.
Unlike a worm gear, which has a periodic error that basically repeats with each turn of the worm, a spur-gear drive has a more random periodic error that depends on the tooth-to-tooth interaction of the gears.
Designed for precise hot melt adhesive applications, the melters are available with a choice of metering spur-gear pumps with variable speed AC motors.