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004 cutting tools
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004 cutting tools

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  • 1. HAND-TYPE CUTTING TOOLS
  • 2. THE HACKSAW
    • Pistol-grip hand hacksaw
    • The blades are made with 14, 18, 24 and 32 teeth per inch.
    • Always use a blade suitable for the thickness of the material to be sawed.
    • An 18-tooth blade (18 teeth per inch) is recommended for general use.
    Adjustable Frame Handle Blade
  • 3. THE HACKSAW
    • The most simple way of selecting a proper blade is to remember that at least two saw teeth should be contacting the material when sawing.
    Right Blade Wrong Blade
  • 4. THE HACKSAW
    • Correct use of hacksaw
    • Make sure the blade frame is correctly adjusted for length of the blade.
    • Place blade in frame so teeth point AWAY from handle.
  • 5. TO USE THE HAND HACKSAW
    • Check to make sure that the blade is of proper pitch for the job and the teeth point away from the handle.
    • Adjust blade tension so that the blade cannot flex or bend.
    • Mount the stock in the vice securely.
    • Grasp the hacksaw . Assume a comfortable stance.
    • Start the saw cut just outside and parallel to a previously scribed line .
    • After the cut has started, apply pressure only on the forward stroke.
    • When nearing the end of the cut, slow down to control the saw as it breaks through the material.
  • 6. FILES
    • A file is a hand cutting tool made of high-carbon steel , having a series of teeth cut on its body by parallel chisel cuts.
    Point Tang Heel Face Edge Length
  • 7. FOUR TYPES OF FILE TEETH Single Cut Double Cut Rasp Cut Curved Tooth
  • 8. FOUR TYPES OF FILE TEETH
    • Single cut files are used when smooth finished is desired.
    • Double cut files are used for fast removal of metal and easy clearing of chips.
    • Rasp cut files are used for cutting wood and very soft metals.
    • Curved tooth files are used on aluminum and steel sheets.
  • 9. CROSS-SECTIONAL VIEWS OF MACHINISTS’ FILES Flat File Round File Half Round File 3 Square File Crossing File Knife Edge File
  • 10. FILING PRACTICE
    • Never use a file without a handle.
    • Fasten the work to be filed, at about elbow height, in a vice.
    • Push the file across the work in a straight line and do not rock the file.
    • Apply pressure only on the forward stroke.
    • Never rub fingers or hand across a surface being filed.
    • Keep the file clean by using a file card frequently.
  • 11. TIGHTENING FILE HANDLE
    • Before attempting to use any file, equip it with a tight-fitting handle similar to the figure shown.
  • 12. PROPER CARE OF FILES
    • Clean the file with a file card.
  • 13. CROSS-FILING Correct way to hold a File
  • 14. DRAW-FILING
  • 15. FILING ROUND SURFACES
  • 16. Filing
  • 17. PRECISION FILES
    • Small files having a fine tooth cuts and round integral handles.
    • Used in tool and die shop for finishing delicate and intricate pieces .
  • 18. ROTARY FILES AND BURRS
    • Used for metal pattern making and die sinking.
  • 19. SCRAPERS
    • Used for removing small amounts of metal from specific areas to produce an accurate bearing surface.