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  2. Speeds and feeds - Wikipedia

    en.wikipedia.org/wiki/Speeds_and_feeds

    Cutting speed may be defined as the rate at the workpiece surface, irrespective of the machining operation used. A cutting speed for mild steel of 100 ft/min is the same whether it is the speed of the cutter passing over the workpiece, such as in a turning operation, or the speed of the cutter moving past a workpiece, such as in a milling operation.

  3. Milling cutter - Wikipedia

    en.wikipedia.org/wiki/Milling_cutter

    Milling cutters are cutting tools typically used in milling machines or machining centres to perform milling operations (and occasionally in other machine tools).They remove material by their movement within the machine (e.g., a ball nose mill) or directly from the cutter's shape (e.g., a form tool such as a hobbing cutter).

  4. Surface feet per minute - Wikipedia

    en.wikipedia.org/wiki/Surface_feet_per_minute

    Surface feet per minute (SFPM or SFM) is the combination of a physical quantity (surface speed) and an imperial and American customary unit (feet per minute or FPM). It is defined as the number of linear feet that a location on a rotating component travels in one minute. Its most common use is in the measurement of cutting speed (surface speed ...

  5. Machinability - Wikipedia

    en.wikipedia.org/wiki/Machinability

    Machinability Rating= (Speed of Machining the workpiece giving 60min tool life)/( Speed of machining the standard metal) Machinability ratings can be used in conjunction with the Taylor tool life equation, =, in order to determine cutting speeds or tool life. It is known that B1112 has a tool life of 60 minutes at a cutting speed of 100 sfpm.

  6. Rake angle - Wikipedia

    en.wikipedia.org/wiki/Rake_angle

    In machining, the rake angle is a parameter used in various cutting processes, describing the angle of the cutting face relative to the workpiece. There are three types of rake angles: positive, zero or neutral, and negative. Positive rake: A tool has a positive rake when the face of the cutting tool slopes away from the cutting edge at inner side.

  7. Arbor milling - Wikipedia

    en.wikipedia.org/wiki/Arbor_milling

    Shown are the suggested ranges for cutting speeds and feed rates using high speed tool steel under dry cutting conditions at a 0.015 in depth of cut. Generally cutting speeds are lower for hard materials, higher for soft materials. Both cutting speeds and feed rates can be substantially increased when coolants are used and carbide tooling is ...

  8. images.huffingtonpost.com

    images.huffingtonpost.com/2012-04-25-20111115CPF...

    STATE OF COLORADO Department of State 1700 Broadway Suite 200 Denver, CO 80290 Scott Gessler Secretary of State William A. Hobbs Deputy Secretary of State Main Number Administrati

  9. Drill bit - Wikipedia

    en.wikipedia.org/wiki/Drill_bit

    Very high rotational speeds—30,000 to 100,000 RPM or even higher—are used; this translates to a reasonably fast linear speed of the cutting tip in these very small diameters. The high speed, small diameter, and the brittleness of the material, make the bits very vulnerable to breaking, particularly if the angle of the bit to the workpiece ...