Engineering Tools

Drill Speed & Feed Calculator

Instantly calculate the optimal RPM and Feed Rate for your drilling operations. Optimized for Stainless Steel, Carbon Steel, and Aluminum.

本计算器用于确定钻孔操作的主轴转速(RPM)和进给率(mm/min)。它根据所选材料的切削速度(Vc)和每转进给量使用标准机械加工公式进行计算。
单位制
切削速度 (Vc)
表面线速度
×
1000
÷
π
×
钻头直径 (D)
钻头尺寸
=
主轴转速 (n)
0
每转进给 (f)
切屑负载
×
主轴转速 (n)
0
=
进给率 (Vf)
0
钻孔深度
÷
进给率 (Vf)
0
=
加工时间
0
Zhonghuan Tools Engineering Series

How to Calculate Drilling Speed for Stainless Steel

The Formula

The standard formula for Drill RPM (Revolutions Per Minute) is:

RPM = (Vc × 1000) / (π × D)
  • Vc (Cutting Speed): The surface speed in meters per minute (m/min).
  • D (Diameter): The drill bit diameter in millimeters (mm).
  • 1000: Conversion factor from meters to millimeters.

Why Speed Matters for Stainless Steel

Stainless steel (especially 304 and 316 grades) has a tendency to work harden. If your drill speed is too high, you generate excessive heat, causing the material to harden instantly and burn your drill bit. If too low, productivity suffers.

Drill Bit Selection Tips

HSS Co (Cobalt)

Best for handheld drilling or standard drill presses. The cobalt content adds heat resistance, crucial for stainless steel.

Solid Carbide

Essential for high-production CNC machining. Allows for 3-4x faster cutting speeds but requires a rigid setup.