Page 62 - CITS - Fitter - Trade Theory

FITTER - CITS

• Shank types: Machine reamers are available with different shank types to suit various machine tool setups.
Common shank types include straight shank, which is suitable for use with drill chucks, and Morse taper
shank, which is compatible with drill press or milling machine spindles.

• Materials: Machine reamers are typically made from high-speed steel (HSS), cobalt steel, or carbide
materials. HSS machine reamers are suitable for general-purpose machining of ferrous and non-ferrous
materials. Cobalt and carbide machine reamers offer higher hardness and wear resistance, making them
suitable for machining hardened steels and exotic alloys.

• Coatings: Some machine reamers may be coated with titanium nitride (TiN), titanium carbonitride (TiCN),
or other coatings to enhance cutting performance and tool life. Coatings can improve lubricity, reduce
friction and heat generation, and extend tool life in high-speed machining applications.
• Applications: Machine reamers are used in a wide range of machining operations, including milling, drilling,
boring, and turning. They are commonly used in manufacturing industries such as aerospace, automotive,
medical, and precision engineering to achieve tight tolerances and high-quality surface finishes.
• Accuracy and precision: Machine reamers allow for precise control over hole size and surface finish,
making them essential tools for applications where tight tolerances are required. They produce accurately
sized and finished holes with minimal deviation from the specified dimensions.
• Operation: Machine reamers are operated using machine tools such as milling machines, drill presses, or
CNC machining centers. The reamer is mounted in the machine spindle or tool holder, and the machine’s
spindle or cutting tool is used to rotate the reamer and feed it into the pre-drilled or bored hole.

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CITS : CG & M - Fitter - Lesson 9