Single-point tool signature (ASA system): For the tool designation 8-6-5-5-10-15-2 mm, what is the side rake angle?

Introduction / Context:
The American Standards Association (ASA) tool signature compactly specifies a single-point tool’s geometry. Interpreting the seven-element sequence correctly is vital for setup, replication, and troubleshooting of machining performance.

Given Data / Assumptions:

• ASA order: back rake – side rake – end relief – side relief – end cutting edge angle – side cutting edge angle – nose radius.
• Tool signature provided: 8-6-5-5-10-15-2 mm.
• Angles are in degrees; the last element is nose radius (here 2 mm).

Concept / Approach:
Mapping each position in the sequence to its meaning yields the required value. The second value in ASA order is the side rake angle, which influences chip flow sideways, cutting forces, and power consumption. Positive side rake reduces cutting force and improves chip evacuation, especially in ductile materials.

Step-by-Step Solution:

Verification / Alternative check:
Cross-checking with standard texts shows the second position is indeed side rake. Some other systems (e.g., ORS/NRS) change reference planes but not the physical angles present.

Why Other Options Are Wrong:

• 5°, 8°, or 10° correspond to other positions in the sequence (end relief, back rake, or end cutting edge angle).

Common Pitfalls:
Confusing back rake with side rake; they act in perpendicular directions and affect chip flow differently. Misreading the nose radius as degrees is another common error.

Final Answer:
6°