July 2024 Tip: Tables of Cutting Speeds

These tables of cutting speeds are for metric, fraction, letter, and number size drills, which I'm providing as a free download. They provide speeds as follows: 

Metric Drills

Cutting speeds for 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 120 meters per minute.

Revolutions per minute are provided for the following diameters in mm and their coinciding meters per minute listed above:
1.5, 2. 2.5, 3, 3.5, 4, 4.5, 6, 7.5, 9, 10.5, 12, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70. 

table of metric drill cutting speeds
Sample of metric cutting speeds table

Fraction Drills

Cutting speeds for 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150 feet per minute.

Revolutions per minute are provided for the following diameters in inches and their coinciding feet per minute listed above: 1/16, 1/8, 3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 5/8, 3/4, 7/8, 1, 1-1/8, 1-1/4, 1-3/8, 1-1/2, 1-5/8, 1-3/4, 1-7/8, 2, 2-1/4, 2-1/2, 2-3/4, 3

table of fraction drill cutting speeds
Sample of fraction cutting speeds table

Letter Drills 

Cutting speeds for 30, 40, 50, 60, 70, 80, 90, 100 feet per minute.
Revolutions per minute are provided for letter sizes A-Z and their coinciding feet per minute listed above.


table of letter size drill cutting speeds
Sample of cutting speeds for letter size drills

Number Drills

Cutting speeds for 30, 40, 50, 60, 70, 80, 90, 100 feet per minute.
Revolutions per minute are provided for letter sizes 1-80 and their coinciding feet per minute listed above.


table of number size drill cutting speeds


I hope you enjoy today's free tip and download. Thanks for visiting www.MachinistKalc.com


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