This is a XRAY 64 Pitch, 29 tooth Narrow Aluminum Hard Coated Pinion Gear. These high-performance pinion gears are manufactured from special lightweight aircraft duraluminum and are 1.5mm thinner and 25% lighter than the regular-size pinion gears.
These narrow pinions are manufactured by XRAY on a specially-modified precision gear machine which has ultra-precise tolerances and assures unparalleled concentricity. After machining, the narrow pinions have all their edges chamfered and then are run-in. The pinions are then specially treated to give them an even hardcoat so they stay absolutely true for a long time. The pinions run great with any spur gears, and work perfectly with XRAY spur gears where even throttle on/off noise disappears. You can be confident in using these narrow pinions right from the package, knowing that you are using a pinion of leading-edge design and production.