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Consider the following tool materials:
1. High speed steel
2. High carbon steel
3. Cemented carbides
4. Ceramics
Q. Negative rake angle is provided for
  • a)
    1 and 2
  • b)
    2 and 3
  • c)
    3 and 4
  • d)
    1 and 4
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Consider the following tool materials:1. High speed steel2. High carbo...

Explanation:

Negative Rake Angle:

Negative rake angle is provided to tool materials in order to increase tool life and reduce cutting forces. This angle means that the cutting edge is inclined below the reference plane. Let's see which tool materials have negative rake angle:

Cemented Carbides:
- Cemented carbides are known for their high hardness and wear resistance.
- They are commonly used for high-speed machining applications and can withstand high temperatures.
- Negative rake angle is often provided to cemented carbides to improve their cutting performance.

Ceramics:
- Ceramics are extremely hard and brittle materials commonly used in high-speed machining operations.
- Negative rake angle is also provided to ceramic tools to enhance their cutting efficiency and tool life.

Therefore, the correct answer is option C: 3 and 4 (Cemented carbides and Ceramics), as these two tool materials typically have negative rake angles for improved cutting performance.
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Consider the following tool materials:1. High speed steel2. High carbon steel3. Cemented carbides4. CeramicsQ.Negative rake angle is provided fora)1 and 2b)2 and 3c)3 and 4d)1 and 4Correct answer is option 'C'. Can you explain this answer?
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