DesignCalc — Machine Design Toolkit

Cutting parameters

Spindle speed, feed rate, material removal rate, machining time and cutting power.

Operation

Cutting speed Vc (m/min)

Diameter D (mm)

Feed f (mm/rev)

Depth of cut ap (mm)

Cut length L (mm)

Specific cutting force kc (N/mm²)

Hole depth L (mm)

Feed per tooth fz (mm)

Number of teeth z

Axial depth ap (mm)

Radial depth ae (mm)

Power = Fc · Vc / 60. Assumes a sharp tool and full depth of cut.

L10 is the life reached by 90% of an identical bearing group.

Dynamic load rating C (N)

Equivalent load P (N)

Speed n (rpm)

Bearing type

Reliability

Lnm = a1 · L10, a1 from ISO 281. Life assumes clean lubrication and correct mounting.

Shaft torsion, key shear and key bearing (crushing) stress for a parallel key.

Torque T (N·m)

Shaft diameter d (mm)

Key width w (mm)

Key height h (mm)

Key length L (mm)

Allowable shear (MPa)

Allowable bearing (MPa)

Need torque from power?

Power (kW)

Speed (rpm)

Add dimensions of an assembly chain. Compares worst-case and statistical (RSS) results.

NameNominal (mm)± tol (mm)

RSS assumes independent, normally distributed errors. Use it for process capability, not for guaranteed limits.