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Surface feet per minute

Home Quick Links. This page provides an overview of Speeds and Feeds to help you understand the terminology and usage. Cutting speed is the speed in linear feet per minute or "Surface Feet per Minute" SFM that a given tooth flute on the cutter will be moving when it cuts through the material. All materials have a documented SFM or "cutting speed". Think of it like a minimum and maximum speed limit on a highway. Some roads you can go faster on and some roads you must go slower on.
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Surface Feet Conversion Chart

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Selecting Speed and Feed Rates - Mastercut Tool Corp

Feeds and speeds: they can make or break a job, and usually a tool or two. When dialed in properly, the right settings can lead to increased material removal rates, a surface finish that meets requirements without hand work, and increased tool longevity. Let us know if you find out. Clearly, this is a complicated problem with many variables.
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Calculating Surface Footage and RPM for Optimum Tool Life

Surface Speed and SFM are used to help determine the best spindle rpm for machining cuts. That sounds pretty useful, right? On a lathe, the work spins and the cutter remains stationary.
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As the depth of cut increases, use the largest diameter cutter available to maintain a depth to diameter ratio of 1 : 1. Feed Rate or Feed per tooth — The inches per minute of workpiece movement toward the cutter between each tooth. With CNC milling, it is measured in the Z axis direction.

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