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Reamer Types by material
 1)Hi-Speed Steel (HSS) Reamer
Pros
  • Affordable
Cons
  • Short-lasting
  • Prone to rust

 2)Carbide Reamer

Pros
  • Long-lasting
Cons
  • Fragile
  • More expensive


Reamer Parts
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Back Taper
Most of reamers are tapered from the tip of chamfer to the end of flute region.

Spiral Flute

Pros

  • Better surface roughness than straight flute
  • Reduced enlargement of finished hole than straight flute

Cons

  • More expensive than straight flute
  • Re-grinding of flute is difficult

Left-hand helix VS Right-hand helix

Left Hand

  • Better burnishing effect, more friction
  • Cutting chips move forward
  • Suitable for non-fellow material such as aluminum

Right Hand

  • Suitable for hard material
  • Cutting chips move backward. Suitable for blind-holes

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