Page 31 - CITS - Fitter - Trade Theory

FITTER - CITS

LESSON 3 : Cutting tools

Objectives

At the end of this lesson you shall be able to
• demonstrate the material cutting tool like files and its classification and their grade and care maintenance
• state the hacksaw frame its construction and safety precaution while using it
• state the specification of chisel and its uses.
Files Element classification and their grade

Definition of file and element
1 File: A Tool used to remove from a work piece it is common in wood working, metal working and other similar
trade and hobby task.

2 Material: Materials Generally files are made of high carbon or high grade cast steel. The body portion is
hardened and tempered. The tang is however not hardened.
3 Element of files

• Tang,
• face,
• edge,
• heel,

• shoulder,
• tip or Point,
• handle

Tip or point
The end opposite to tang
Face or side
The broad part of the file with teeth cut on its surface
Edge: The thin part of the file with a single row of parallel teeth

Heel: The portion of the broad part without teeth
Shoulder: the curved part of the file separating tang from the body
Tang: The narrow and thin part of a file which fits into the handle
Handle: The part fitted to the tang for holding the file

Ferrule: A protective metal ring to prevent cracking of the handle.

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