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User's Manual ISO TNC 360 (260020xx, 280490xx) - heidenhain

User's Manual ISO TNC 360 (260020xx, 280490xx) - heidenhain

User's Manual ISO TNC 360 (260020xx, 280490xx) - heidenhain

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11 Tables, Overviews, Diagrams<br />

11.4 Diagrams for Machining<br />

Feed rate F<br />

11-16<br />

The feed rate F of the tool is calculated from the number of tool teeth n,<br />

the permissible depth of cut per tooth d, and the spindle speed S:<br />

F = n . d . S<br />

Units:<br />

F in mm/min<br />

d in mm<br />

S in rpm<br />

The feed rate read from the diagram must be multiplied by the number of<br />

tool teeth.<br />

Example:<br />

Depth of cut per tooth d = 0.1 mm<br />

Spindle speed S = 500 rpm<br />

Feed rate from diagram F = 50 mm/min<br />

Number of tool teeth n = 6<br />

Feed rate to enter F = 300 mm/min<br />

The diagram provides approximate values and assumes the following:<br />

• Downfeed in the tool axis = 0.5 . R and the tool is cutting through solid metal, or<br />

• Lateral metal-to-air ratio = 0.25 . R and downfeed in the tool axis = R<br />

Depth of cut per tooth<br />

d [mm]<br />

Spindle speed<br />

S [rpm]<br />

<strong>TNC</strong> <strong>360</strong>

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