What is the recommended drilling speed for stainless steel compared to aluminum alloy sheet?

When drilling stainless steel compared to aluminum alloy sheet, it's important to understand the properties of the materials and how they affect the drilling process. Stainless steel is significantly harder and more ductile than aluminum, which means it requires different handling during machining.

The correct answer indicates that a lower speed with more pressure should be employed when drilling stainless steel. This approach is essential for several reasons:

1. Material Hardness: Stainless steel can work-harden if drilled at too high a speed. At elevated speeds, friction increases, generating heat that can lead to work-hardening and ultimately dulling the drill bit. By using a lower speed, the heat generated is minimized, maintaining the integrity of the drill bit and the workpiece.

2. Drill Bit Performance: When drilling harder materials like stainless steel, applying more pressure can facilitate the cutting process. This additional pressure ensures that the drill bit engages the material effectively, allowing it to cut through rather than just sliding on the surface or causing excess wear on the bit.

3. Chip Removal: Effective chip removal is crucial when drilling harder materials. A lower speed allows chips to be cleared more efficiently from the cutting area, reducing the risk of recutting chips, which can lead to further heat