Fabrication of this molybdenum TZM spindle demonstrates F&A Machine's advanced skills for CNC machining precision parts used in the semiconductor industry. Since this part would be spinning at high speeds, concentricity was critical, and our challenge was to keep the total runout within a 0.001" tolerance.
After examining the customer-supplied specifications, our engineering team designed and built a custom fixture to rigidly hold the workpieces throughout the manufacturing process. Primary machining operations involved turning, drilling, grooving, and threading the 20.65" long/1.5"O.D. spindle on our CNC lathe. We used a CNC lathe to drill a 9" deep, 0.5" diameter hole through the center. Intricate machining techniques were then conducted on a CNC mill, to mill the flats, and drill the precise hole pattern on the indexing head with true position accuracy of .007". The spindle was then heat treated and sent to our quality engineers for inspection, which verified that the dimensional tolerances held to +.0000"/-.0003" and the concentricity was well within specification. After successfully CNC machining several thousand units, we shipped the spindles to our customer in New Jersey.
To learn more about this project, or how our custom CNC machining abilities to precision machine molybdenum parts can help you with your application, please contact F&A Machine today.