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Cutting Speeds and RPM Calculations for Drill Press Operations

You'll practice calculating and selecting the proper cutting speeds for various drill press operations.

WiscOnline3
Created Date 06.16.15
Last Updated 06.16.15
Viewed 993 Times
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Topics of this game:
  • Cutting speed is the speed:
  • If two drills of different sizes are operating at the same RPM, the larger drill:
  • The harder the work material:
  • Although you will find specific cutting speeds for reamers, a simple rule of _____ the speed of drilling will work for most reaming operations.
  • Although you will find specific cutting speeds for countersinking and counterboring, a simple rule of _____ the speed of drilling will work for most countersinking and counterboring operations.
  • When calculating the proper RPM for using a center drill, use the diameter of the ____for your calculations.
  • Many variables must be considered when selecting the best spindle speed for machine tapping. Select the variable that should NOT be taken into consideration.
  • Calculate the RPM for drilling with a 2.500-inch carbide drill in 1045 steel. The cutting speed for a carbide drill in 1045 steel is 500 SFPM.
  • Calculate the RPM for drilling a hole with a 0.75-inch, high-speed steel drill in 1095 steel. The cutting speed for a high-speed steel drill in 1095 steel is 40 SFPM.
  • Calculate the RPM for drilling with a 1.00-inch high-speed steel drill in 52100 steel. The cutting speed for a high-speed drill, drilling in 52100 steel, is 50 SFPM.
  • Calculate the RPM for counterboring with a 0.7500-inch counterbore in 4140 steel. The cutting speed for a high-speed steel drill in 4140 steel is 80 SFPM.
  • Calculate the RPM for countersinking to a diameter of .500-inch in 1018 steel. The cutting speed for a high-speed steel drill in 1018 steel is 90 SFPM.
  • Calculate the RPM for center drilling in 1018 steel. The center drill is a #4 center drill, which has a 3/8-inch body diameter and a 1/8-inch pilot diameter. The cutting speed for a high-speed steel drill in 1018 steel is 100 SFPM.
  • Calculate the RPM for tapping with a ½-13 high-speed steel tap in 4140 steel. The cutting speed for a high-speed steel tap in 4140 steel is 50 SFPM.
  • Calculate the RPM for drilling with a .125-inch solid carbide drill in 1045 steel. The cutting speed for a carbide drill in 1045 steel is 320 SFPM.

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