Mechanical Engineering - Workshop Technology - Discussion

55 is the right answer.

For cutting mild steel with a chisel, the recommended cutting angle is typically 60 degrees.

Here's some additional context:
The 60-degree angle is a good balance between sharpness and durability for working with mild steel.

This angle provides enough strength to the cutting edge to withstand the forces involved in cutting steel, while still maintaining sufficient sharpness for effective cutting.

For softer materials like wood, a sharper angle (around 25-30 degrees) might be used, while for harder metals, a slightly more obtuse angle might be preferred.

The exact angle can sometimes vary slightly (between 55-65 degrees) depending on the specific application and personal preference of the metalworker.
It's important to maintain this angle when re-sharpening the chisel to ensure consistent performance.

The correct answer is 30°.

When cutting mild steel with a chisel, a cutting angle of 30° is typically recommended. This angle provides the optimal balance between:

- Penetration: The chisel can easily penetrate the steel without slipping or glancing off.
- Control: The user can maintain control over the chisel and direct the force effectively.
- Efficiency: The 30° angle allows for efficient material removal with minimal effort.

Using a cutting angle of:
- 45° or more can lead to the chisel digging in too deeply, causing it to bind or stick.
- 50° or more can result in the chisel slipping or glancing off the steel surface.
- 60° or more is too shallow, making it difficult to penetrate the steel effectively.

So, The ideal cutting angle may vary depending on the application, chisel type, and user preference.

However, 30° is a commonly accepted angle for cutting mild steel.

High carbon - 65.
Cast iron - 60.
Aluminium - 30.
Copper - 45.
Brass - 50.

55° is the correct answer.

55° is the correct answer. I too agree.

Mild steel 55°.

Option C is the correct answer.

Mild steel 55° cast iron 60° aluminium 35°.

60° is not correct this angle is cast air on. The Right answer is 55 °

Or correct me, if I am wrong.