Starrett 696Z Crankshaft Distortion Dial/Strain Gauge, 0.001" Graduation, 2-3/8" - 18" Range, 0-20-0 Dial Reading, 0.040" One Revolution

An ideal gauge for checking bearing alignment or shaft deflection without dismantling the engine. Useful as a strain gauge on engine frames. This inside measuring gauge checks the distortion of crankshaft webs. This distortion bears a direct relation to existing misalignment or excessive bearing wear. The gauge makes it possible to check bearing alignment or undue shaft deflection without dismantling the engine. Used on all diesel engine shafts and the centre crankshafts on any type of engine or compressor, the gauge can also be applied as a strain gauge on engine frames while the engine is operating. A comparison of readings taken at top and bottom positions indicates any misalignment of cylinder and frame which results in local over-stress and eventual cracking of the frame neck. With a special spring tension in the dial indicator, the gauge is self-sustaining in any position without sacrificing necessary rigidity, thus leaving the operators hands free. The contact points are conical, with an approximate 60 degree included angle, hardened and ground to a sharp point, and will stay in place on 45 degree surfaces.