![]() The reason for this spline description is to give the designer the information, what size of part (most of the time bearing's bore) can be moved with some clearance ABOVE the spline. The "reference dia" is a theoretical diameter, slightly larger than major diameter on the shaft spline. N means "Nabe" (Hub, internal) W means Welle (Shaft, external) If only one spline is defined, the letter N or W are used before the reference diameter. The root shape (flat or full radius) can be also specified. This spline is "side fit" the OD or ID centered splines are described with more data. The spline specification looks like this:ĩH is tolerance on the hub (internal) splineĨf is tolerance on the shaft (external) spline. This mimics an earlier posting by gearguru:
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