Rampenwinkel berechnen

Ramping angle formula

When an end mill enters the material at an angle (ramping or helical entry), the centre of the tool cuts material. The maximum ramping angle depends on the tool's centre-cutting capability and the axial depth per revolution.

• Ramp angle = arctan(axial depth per pass / (π × tool diameter))
• Maximum safe ramp angle ≈ 3-5 deg for most indexable and solid carbide end mills
• Centre-cutting end mills can ramp steeper than non-centre-cutting tools

How to use this Ramping Angle Calculator

Enter the axial depth per pass (ap) and the tool diameter. The calculator shows the ramping angle and the recommended maximum. For most end mills, keep the ramp angle below 5 deg . Use helical entry for tight bores.