QTC also offers over 9,000 off-the-shelf timing belt pulleys, belts, belt and roller chain tensioners and other power transmission components. These products designed for use in prototypes or for production applications are featured in our companion catalog Q470. Other new products include spur, worm and miter gears in 4 DP thru 64 DP. These gears are available in steel, brass and acetal. The catalog also includes roller chain, roller sprockets, taper bushings and a section detailing Planetary Gearheads, size 52, 78 and 98 in single and double stage design.