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Single Point Cutting Tools


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Information about single point cutting tools, their materials, their geometry, etc

Published in: Engineering
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Single Point Cutting Tools

  2. 2. • Types of tools • Tool geometry • Tool designation 1. ASA System 2. ORS System • Effects of back rake angle on machining • Effect of side rake angle • Effect of relief angle • Effect of cutting edge angle • Effect of nose radius on machining • Tool material • Conclusion • References Content
  3. 3. Types of tool 1. Single point cutting tool • One cutting tip is available • e.g. lathe machine tools, shaping tools, planning tools, etc. 2. Multi-point cutting tool • More than one tip is available • e.g. milling cutter, grinding wheel, drill, etc. MULTIPOINT CUTTING TOOLS
  4. 4. Tool Geometry
  5. 5. Tool Designation 1. ASA System 2. ORS System 3. NRS System
  6. 6. ASA System • Angles are measured with reference to 3 mutually perpendicular planes. • Understanding is easy. • Measurements of angles is also easy. • Analysis of machining is difficult.
  7. 7. ORS System • Angles measured with reference to major cutting edge. • Analysis is easy. • Understanding is difficult. • For measurement of angles, we require special fixtures.
  8. 8. Effect of Back rake angle on machining As back rake angle increases, • Strength of tool increases. • Forces on tool decreases. • Power required for machining is decreases. • Tool life increases. Maximum +ve rake angle used is 45 degree. 0 degree rake angle used for brass workpieces. Also for thread cutting 0 degree rake angle is used. -ve rake angle is used carbide cutting tool. -ve rake angle used is 10 degree only.
  9. 9. Effect of side rake angle on machining As side rake angle increases, • Strength of tool increases. • Forces are decreases but in small amount. • Power is also decreases but in small amount. • Tool life is increases. Generally side rake angle is in between 5 to 15 degree.
  10. 10. Effect of relief angle Provided to avoid rubbing between tool and workpiece. As relief angle increases, • Strength decreases. • Forces are slightly decreases. • Tool life is slightly increases.
  11. 11. Effect of cutting edge angle Mainly influence the surface finish of component. By reducing end cutting angle or by increasing side cutting angle, nose size increases and surface finish also increases.
  12. 12. Effect of nose radius Mainly influence the surface finish. With increase in nose radius, surface finish increases.
  13. 13. Tool material • High carbon steel • High speed steel • Stellite • Cemented carbide+ • Ceramics • Cermets • Diamond • CBN (Cubic Boron Nitrite) or Borozone • Ucon • Sialon
  14. 14. Conclusion • There are many advantages of single point cutting tool, but there also many disadvantages. • Many disadvantages of single point cutting tool are reduced by multi point cutting tool. • In this we see geometry of cutting tool, material of cutting tool, etc.
  15. 15. references • Production technology by P. C. Sharma • Workshop technology by Hajara Choudhari • Website –