A tool has the signature form as 8, 8, 5, 5, 6, 6, 1 as per American Standard Association. In this, 1 represents-

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Question

This question was previously asked in

RRB JE ME CBT 2 Previous Paper 1: Held on 29 Aug 2019

Answer 1

Concept:

A tool has two systems:

ASA tool signature has 7 elements

American Standards System (ASA) system ⇒ Back rake angle – side rake angle – end relief angle (ERA) – side relief angle – end cutting Edge angle – side Cutting Edge Angle- Nose Radius
Orthogonal Rake System (ORS) or International system ⇒ I (inclination angle) – αn (Normal rake angle) - Side relief angle- end relief angle, end cutting edge angle – Approved angle – nose radius
In both, the system nose radius comes in the last.
In given system 8 - 8 - 5 - 5 - 6 - 6 - 1, the following notations are indicated
- 8 shows Back rake angle
- 8 shows Side rake angle
- 5 End relief angle
- 5 Side relief angle
- 6 End cutting edge angle
- 6 Side cutting edge angle
- 1 nose radius