A Spline Locator is a precision tool or fixture used to align and position splined components accurately during inspection, assembly, or machining. It ensures that the spline’s teeth (either internal or external) are correctly oriented to a reference position, which is crucial for maintaining proper fit, function, and load distribution in mechanical assemblies.

To locate the part using its spline form as the reference. To ensure repeatable positioning in fixtures or gauges. To assist in dimensional inspection of splines using CMMs or gauges.