Special Features:

Yfirst end has a 0.5133 in. Min.-0.5223 in. Max. Hole 1.030 in. Min.-0.109 in. Max. Deep tapped 0.800 in. Min.Deep for a 0.500 in. Nom.-20unf-2b helical coil insert; second shaft end is threaded at 1.000-12unf-2a; a 0.141 in. Min.-0.151 in. Max. Dia. Hole runs through the second shaft end 0.531 in. Min.-0.630 in. Max. From the shaft end; spline inner and outer race is steelalloy; astm-a322; hot rolled or astm-a331; cold finished 4150. Ball bearing spline is to be a coupling which permits translation while subject to reactive torque loads; the device shall cons1st of mating inner and outer races containing concave axial races and a complement of bearing balls; the balls provide the only physical contact between the inner and outer races

Properties:

A shaft having two or more different diameters (greater than 0.031 inches (0.79 millimeter)) along its length. It must have one or more of the following conditions: a specified surface finish designation in the range 1 to 125 microinches (0.025 to 3.2 micrometers) arithmetical average (aa), machined peripheral flat(s), circular groove(s), keyway(s), splines, threads, or holes. The ends and/or shoulders may be machined to accommodate bearings, couplings, and the like. It is not designed for use in aligning by fitting into corresponding holes of another item. For items used to support rotating members see axle(1), shouldered. For items not having any of the above conditions see pin, shoulder, headless. Excludes shaft(1), straight; and axle(1), straight.