Frequently Asked Question

Cutting parameters

Cutting speed is the relative speed at the cutting edge; feed describes how much material advances per revolution or tooth. These quantities control chip thickness, heat generation, surface finish, cutting force, and tool life. Use the tool diameter and the correct unit conversion before selecting a spindle speed. Feed per tooth is not interchangeable with feed per revolution.

N is spindle speed, V_c is cutting speed, D is diameter, V_f is table feed, f_z is feed per tooth, z is tooth count, and MRR is material-removal rate.

Worked example

For a 10 mm tool at V_c = 100 m/min, N = 1000×100/(π×10) = 3,183 rev/min. With four teeth and f_z = 0.05 mm/tooth, feed is 0.05×4×3183 = 637 mm/min. Confirm machine limits, rigidity, chip evacuation, and workholding before production.

Engineering check

For Machining Cutting Speed, Feed, and Material Removal Rate, record the material condition, tool or fixture identity, process settings, measurement method, sampling plan, and reaction rule. Confirm that the measurement system is capable of resolving the requirement and that the process is stable before using capability or first-article data to justify release. Reconfirm the limits after a material, tool, or route change.

Process-control note

For Machining Cutting Speed, Feed, and Material Removal Rate, the calculation is only one part of the manufacturing decision. Define the drawing characteristic and its functional datum, identify the process variable that moves it, establish a measurement method with suitable resolution, and record the material, tool, fixture, revision, and sampling window. Confirm the result with a first-article or capability study representative of production. If the process changes, reassess the underlying failure mechanism instead of carrying old settings forward unchanged.