Which of the following file is commonly used for finishing inside the teeth of gear wheels?

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ALP CBT 2 Fitter Previous Paper: Held on 21 Jan 2019 Shift 1
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  1. Mill saw file
  2. Riffle file
  3. Barrette file 
  4. Cross file 

Answer (Detailed Solution Below)

Option 3 : Barrette file 
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Detailed Solution

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Explanation:

Files

  • They are hardened steel tools for cutting, removing or smoothing metal.
  • The shape of a file is specified by its cross-section.

Barrette files

  • These are tapered in width and thickness, which allows them to access small spaces.
  • Only the flat side is cut, and the other sides are all safe for doing flat work.
  • They are used for special use on dovetail guides, finishing work of internal gear teeth.

28.303.2018.001.14

Mill saw files:

  • Mill saw files are usually flat and have square or rounded edges.
  • These are used for sharpening teeth of woodworking saws and are available in a single cut.

Mill saw

Crossing file:

  • This file is used in the place of a half-round file.
  • Each side of the file has different curves.
  • It is also known as the "fish back" file.

Crossing file

Riffler files

  • These are used for die-sinking, engraving, and in silversmith’s work.
  • They are made in different shapes and sizes and are made with standard cuts of teeth.

rifler f

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