Commutator Gage Dynamically Measures Shaft Parts

Mahr Federal developed its RPM gage for the dynamic measurement of cylindrical parts such as commutator shafts, turbocharger turbine shafts and other precision shafts in electric motors. The commutator gage can be used in the lab or on the shop floor to measure multiple dimensional parameters, including diameter, roundness, runout, segment gap, and segment height to height and profile. It can be dedicated for a specific shaft size or adjusted to measure shaft lengths ranging from 130 to 300 mm, shaft diameters from 4 to 20 mm, and winding diameters from 25 to 80 mm.

The gage incorporates precision Vs and adjustable end-stops to support the shaft and define its axial position, and a motion belt to rotate the shaft. A DC motor drives the motion belt from 2 to 20 rpm while the gaging computer collects data for analysis.

The customizable software displays results as bar graphs, polar graphs or XY graphs with measuring values or mean values. The D1200X software interface optimizes gage use and enables quick, easy creation of customized forms and programs. It also provides integrated functions for measuring system analysis, repeatability and reproducibility. SPC functions enable analysis of X/S, X/R, Pareto and histograms, and data can be exported in QDAS, Quasar, ASCII and Excel formats.