National Machine Tool Company
Providing Keyway Solutions Since 1903
National Machine Tool Company | National Machine Tool Company Providing Keyway Solutions Since 1903

Keyway Milling of a Stainless Steel Auger for the Food Processing Industry

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Keyway Mill Tooling
Keyway Mill Tooling

This auger keyseat miller was designed for a customer in the food processing equipment manufacturing industry. Our task at National Machine Tool Company was to design an develop a tool to mill 6 slots 60 degrees apart beginning 5" down in the part. Our solution was to create a unique keyseat miller designed with a side location guide 60˚ from the center line of the cutter. We milled the first slot conventionally, and attached the location guide and rotated the tool 60˚. The location guide slides into the first slot milled and the process is repeated until all 6 slots are complete. This process is completed using our CNC milling and turning capabilities in addition to precision grinding. The finished keyway dimensions were .5” in width and a depth of .187" with radius ARC. The customer supplied drawings called out the use of 440 stainless steel and was manufactured within a tolerance of ±.0002". Extensive visual and dimensional inspections were conducted to ensure quality and functionality of the part. This project highlights our ability to design a tool to index radiused slots in blind bores.

For more information on this project, or the processes involved to manufacture it, see the table below or contact us directly.

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Keyway Milling of a Stainless Steel Auger Project Highlights

Product Name
Auger Keyseat Miller
Problem Description
Part required 6 slots 60 degrees apart beginning 5 inches down in the part
Special Keyseat Miller designed with side location guide 60 degrees from the centerline of cutter-mill first slot conventionally-attach location guide-rotate tool 60 degrees-location guide slides into first slot milled-process is repeated until all six slots are complete
Capabilities Applied/Processes
  • Product Development/Design
CNC Milling
CNC Turning
Keyway Dimensions
Width: 0.500"
Depth: 0.187" with Radius ARC
Tightest Tolerances
Within 0.0002"
Material Cut
440 Stainless Steel
In process testing/inspection performed
Dimensional Inspection, Visual Inspection, Functionality
Industry for Use
Food Processing Equipment Manufacturing
Delivery/Turnaround Time
Stock Items: 2 - 3 Days
Custom Items: 2 - 3 Weeks
Delivery Location
Nationwide / Worldwide
Standards Met
Customer Specifications, 2D CAD Drawing

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