CNC MachiningMOLY & TZM FASTENERSPORTFOLIO GALLERYManufacturing of an Aluminum Color Transfer Unit Assembly for the Printing IndustryCNC Machining of a TZM Spindle for the Semiconductor IndustryCNC Milling of a Molybdenum Heat Shield for the Semiconductor IndustryCNC Machining of Molybdenum Housing for the Aerospace Research FieldCNC Milling of Molybdenum Nuts for the IndustryCNC Machining of TZM Adapter for the Aerospace Research Field Printable PagePrintable Page  Email This PageEmail This Page

CNC Machining of a TZM Spindle for the Semiconductor Industry

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TZM Spindle
TZM Spindle

TZM Spindle
TZM Spindle

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.

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CNC Machined TZM Spindle Project Highlights

Product DescriptionThis TZM spindle is used within a machine for a semiconductor application. The concentricity was critical in this application as it would be spinning at high RPM’s.
Capabilities Applied/ProcessesPrimary:
Custom CNC Turning Services
  • Turn O.D.
  • Drill
  • Groove
  • Thread
Custom CNC Milling Services
  • Deep Hole Drilling
  • Drill Hole Pattern on Indexing Head
  • Mill Flats
Custom Fixture Design and Manufacturing
Heat Treatment
Overall Part DimensionsLength: 20.65"
O.D.: Ø1.500
Deep Hole:
Length: 9.000"
Diameter: Ø.500"
Tightest Tolerances+.0000/-.0003
Total Runout .001"
True Position of .007"
Material UsedTZM Molybdenum
  • Small Traces of Titanium and Zirconium
Material FinishNatural 
In process testing/inspection performed100% Dimensional Inspection
Industry for UseSemiconductor
VolumeSeveral Thousand
Delivery LocationNew Jersey
Standards MetCustomer Supplied CAD Print
Product NameTZM Spindle
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