THE STEEL USED IS C1045/1050 COLD FINISHED SHAFTING TO ASTM A-108-90A.
SIZE TOLERANCES ARE TO ASTM STANDARD SPECIFICATIONS A 29/A 29M
PRECISION GROUND SHAFTING REPRESENTS THE HIGHEST DEGREE OF OVER-ALL ACCURACY, CONCENTRICITY, STRAIGHTNESS, AND SURFACE PERFECTION ATTAINABLE IN COMMERCIAL PRACTICE. AFTER BEING GROUND ON A CENTERLESS GRINDER, BARS ARE POLISHED TO A SURFACE FINISH OF RMS. 25 MAX.
THE BARS ARE HARD CHROME PLATED BY ELECTROLYTICALLY DEPOSITED LAYERS OF
CHROMIUM METAL ON THE SURFACE AND CONFERS THE IMPORTANT PROPERTIES
OF CORROSION RESISTANCE AND WEAR RESISTANCE. BEING THAT IT IS VERY SMOOTH IT HAS A LOW COEFFICIENCY TO FRICTION.