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Turning (Cutting Time)
Cutting Time (External Turning Case 1: 1 Pass machining)
• At Constant Revoluation T : Cutting Time [second]
L : Cutting Length [mm]
60L f : Feed Rate [mm/rev] Technical
T n : Spindle Revolution [min-1] Information
Dm : Workpiece Diameter [mm]
fn Vc : Cutting Speed [m/min]
• At Constant Cutting Speed
60LDm
T
1000fVc
Cutting Time (External Turning Case 2: Multi-Pass machining)
T : Cutting Time [second]
• At Constant Revoluation L : Cutting Length per Pass [mm]
ap : Depth Of Cut per Pass [mm]
T 60L N f : Feed Rate [mm/rev]
fn n : Spindle Revolution [min-1]
• At Constant Cutting Speed D1 : Max. Diameter of Workpiece [mm]
D2 : Min. Diameter of Workpiece [mm]
T 60LD1D2 N Vc : Cutting Speed [m/min]
21000fVc N : Number of Passes = (D1 - D2)/ap/2 (if it is indivisible, obtain integer by rounding up
one place of decimals.)
Cutting Time (Facing) T : Cutting Time [second]
T1 : Machining Time before reaching Max.
• At Constant Revoluation
Spindle Revolution [second]
T 60D1D2N L : Cutting Length [mm]
2fn ap : Depth Of Cut per Pass [mm]
f : Feed Rate [mm/rev]
• At Constant Cutting Speed n : Spindle Revolution [min-1]
D1 : Max. Diameter of Workpiece [mm]
T1 60D1D2D1D2 N D2 : Min. Diameter of Workpiece [mm]
4000fVc Vc : Cutting Speed [m/min]
N : Number of Passes = L/ap (if it is indivisible, obtain integer by rounding up one place
of decimals.)
Cutting Time (Grooving) T : Cutting Time [second] R
T1 : Machining Time before reaching Max.
• At Constant Revoluation
Spindle Revolution [second]
T 60D1D2 L : Cutting Length [mm]
2fn f : Feed Rate [mm/rev]
n : Spindle Revolution [min-1]
• At Constant Cutting Speed D1 : Max. Diameter of Workpiece [mm]
D2 : Min. Diameter of Workpiece [mm]
T1 60D1D2D1D2 Vc : Cutting Speed [m/min]
4000fVc
Cutting Time (Cut-Off) T : Cutting Time [second]
T1 : Machining Time before reaching Max.
• At Constant Revoluation
Spindle Revolution [second]
T 60D1 T3 : Machining Time when reaching
2fn
Max. Spindle Revolution [second]
• At Constant Cutting Speed f : Feed Rate [mm/rev]
n : Spindle Revolution [min-1]
T1 60D1D3D1D3 nmax : Max. Spindle Revolution [min-1]
4000fVc D1 : Max. Diameter of Workpiece [mm]
D3 : Diameter when reaching Max. Spindle Revolution [mm]
T3 T1 60D3 Vc : Cutting Speed [m/min]
2fnmax
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