Our Capabilities

At National Machine Tool Company we specialize in providing high quality custom keyseat millers for customers with demanding applications. Standard as well as special cutting tools and custom designs are available for production of full depth, internal, v shaped, two-step, parallel/opposite keyseats, straight splines, and radius arc splines. Our keyseat millers are the cost effective and faster alternative to EDM and broaching processes, and can work in both open end and blind bores. We offer millers in a range of sizes to produce bore diameters from .439” to 6”, keyslot widths of .030” to 2.5”, and a keyslot length of up to 12” in most material types. We manufacture attachments for use with manual equipment as well as horizontal and vertical CNC machining centers. Relief holes are not needed for the operation of our tools. For over 100 years, we at National Machine Tool have provided custom cutting solutions to meet the slotting requirements of customers in industries including food processing, pump manufacturing, automotive, aerospace, power transmission, lumber, and musical instruments. Our milling equipment has been reliably used for a myriad of applications including gears, impellers, couplings, blowers, motor shafts, pump sleeves, and valves among many others. For more details about the design and manufacturing of custom keyseat millers, or for the solutions to your internal keyseating problems please see the table below or contact us directly.

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