Advanced Precision Machining

Advanced Precision Machining provides unparalleled customer satisfaction. Call us today at 303.776.1910.

CNC Milling

Advanced Precision Machining, a Longmont machine shop, provides milling, turning, prototype development and production in our state-of-the-art machine shop. Featuring the latest CNC Mills and CNC Lathes to cut steels, composite materials, exotic metals, aluminum, and plastics. Our fully certified machinists will be happy to discuss any milling project with you. Contact us today for a free consultation or quote.

For additional information about milling, we invite you to read the below information or to contact one of our machining experts.

A milling machine is a machine tool used to machine solid materials into a wide variety of sizes and shapes. The product is generally used as components of otherLongmont Machine Shop - Milling Machine machines, retail items, or assemblies. 

Milling machines are often classed in two basic forms, horizontal and vertical.  This refers to the orientation of the main spindle. Both types range in size from small, bench-mounted devices to room-sized machines. Unlike a drill press, which holds the workpiece stationary as the drill moves axially to penetrate the material.  Milling machines also move the workpiece radially against the rotating milling cutter, which cuts on its sides as well as its tip. 

Milling machines may be manually operated, mechanically automated, or digitally automated via computer numerical control (CNC).

Types of Mills:

  • Knee mill or knee-and-column mill refers to any milling machine whose x-y table rides up and down the column on a vertically adjustable knee. This includes Bridgeports.
  • Bed mill: This refers to any milling machine where the spindle is on a pendant that moves up and down to move the cutter into the work. These are generally more rigid than a knee mill.
  • Box mill or column mill: Basic hobbyist bench-mounted milling machines that feature a head riding up and down on a column or box way.
  • C-Frame mill: These are larger, industrial production mills. They feature a knee and fixed spindle head that is only mobile vertically. They are typically much more powerful than a turret mill, featuring a separate hydraulic motor for integral hydraulic power feeds in all directions, and a twenty to fifty horsepower motor. Backlash eliminators are almost always standard equipment. They use large NMTB 40 or 50 tooling. The tables on C-frame mills are usually 18" by 68" or larger, to allow multiple parts to be machined at the same time.
  • Gantry mill: The milling head rides over two rails (often steel tubes) which lie at each side of the work surface.

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