CAT 40 5/8-11 45 Pull Stud Retention Knob for Fadal Mazak Hurco Tree 202-5928(5) P$$Tools & Hardware Other

Made from alloy steel 5155 with heat treat to RC 56-58 Each retention knob is individually magnetic particle tested to ensure free of crack High quality black oxide finish to ensure long enduring tool life Concentricity is inspected with a Mahr Millimess 1003 Dial Comparator which has a 1 micron (um) graduation and 0.5 micron (um) repeatability to ensure each batch production of the retention knob is true to the spindle center line. A critical dimension on every retention knob is the height of the loading contact point and the height of un-loading contact point. When this two dimensions are not within tolerance, there could lead to improper engagement with main spindle and even cause severe damage to the retention knob's rigidity. This two dimensions are inspected on an optical tool presetter that is made in Italy by a world-renowned manufacture and measurement are monitored in micron (um). Fully ground on all critical surface including a pilot under the flange of retention knob for full contact between tool holder's taper end and retention knob Precision finished on the bottom of the flange to improve fitting with the bottom nose of the taper on the tool holder