Comprehensive manufacturing specification for a 1st speed loose gear (part number CHCV6R-7100-AA) made from 28CrS4 steel according to EN 10084 standards. The drawing includes both gear data and tooling requirements for hobbing and shaving operations. Key specifications include involute spline data with 42 teeth, 30° pressure angle, 84.4±0.1mm base diameter, and 91.228mm minimum tip diameter. The gear features precise dimensional tolerances, with an outside diameter of 115.5mm (-0.1mm), pitch circle diameter of 77.5mm (+0.25/-0.5mm), and root diameter of 43mm minimum. The drawing details critical chamfer dimensions, including 0.4×45°±5° specifications and a maximum 0.7×45° chamfer. Surface roughness requirements are specified as Ra 0.63 and Ra 0.75 at critical surfaces. Manufacturing notes indicate specific tolerances for material protrusion (0.3mm max) and radial runout (0.1mm max).
Involute Gear Hob Data Sheet for 1st Speed Loose Gear Production
