What is the recommended angle for a drill bit when drilling stainless steel?

The recommended angle for a drill bit when drilling stainless steel is 130 degrees. This angle is optimal because it provides a good balance between cutting efficiency and chip removal. Stainless steel is known for its toughness and tendency to work-harden, meaning it can dull drill bits more quickly than softer metals. A point angle of 130 degrees helps to penetrate the material effectively without excessive friction, which can generate heat and lead to premature wear on the drill bit.

Additionally, this angle helps in controlling the cutting action, allowing for smoother drilling and reducing the likelihood of the drill bit binding or breaking. The wider point angle also aids in clearing the chips away from the hole being drilled, which is essential to prevent the drill bit from getting stuck and to maintain a cleaner hole.

Conversely, angles that are too acute can create excessive heat and may not effectively clear chips, while those that are too obtuse may not penetrate effectively. Therefore, 130 degrees strikes the right balance for stainless steel applications.