Cutting tool classification by operation: What type of cutting tool is typically used on a milling machine and on a broaching machine?

Introduction / Context:
Different machine tools employ cutting tools with distinct edge configurations. Recognizing whether an operation uses single- or multi-point tools helps anticipate chip formation, cutting forces, and achievable surface finish. Milling cutters and broaches have many teeth, making them classic examples of multi-point tools.

Given Data / Assumptions:

• Milling: slab, end, face, or form cutters with multiple flutes/teeth.
• Broaching: a broach with a progressive row of teeth increasing in height (rise per tooth).
• Continuous metal cutting (not scraping or grinding).

Concept / Approach:
A single-point tool has one major cutting edge (e.g., a turning tool on a lathe). Multi-point tools possess multiple edges engaged either simultaneously or sequentially (milling teeth, broach teeth). Multiple teeth share the load and can produce high MRR and better surface finishes under the right conditions.

Step-by-Step Solution:

Verification / Alternative check:
Standard textbooks classify milling cutters and broaches as multi-tooth, differentiating them from the single-point lathe tool and the two-point boring bar with twin edges (special cases).

Why Other Options Are Wrong:

• Single/two/three-point: do not describe milling and broaching accurately.
• Scraper: not a chip-forming cutting tool for these machines.

Common Pitfalls:
Counting only the number of teeth engaged at any instant; even if just one or a few teeth cut at a time, the tool is still classified as multi-point by design.

Final Answer:
multi-point cutting tool