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   Selection of Files

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Choosing the Right File


Length
  • Desired stroke length will determine the length of the file. This is measured exclusive of the tang, from point to heel.
  • A new file should be used with light pressure in the beginning, preferably on a surface which has been filed earlier.
  • In case of clogging of file teeth, clean the teeth with a soft metal wire brush.
  • Use the files for cutting in the forward stroke only.
  • Filing jobs should be held rigidly.



  


The Type of Cut

These cuts are selected according to the material of the workpiece, the desired removal of material and the surface finish.


Single Cut

Double Cut

Rasp Cut

Milled Toothing


  


The Cut Coarseness

These cuts are determined by the same factors as the type of cut and is the number of teeth per inch.

  • It refers to the number of teeth per inch length measured along the axis of the file. The smooth file has more number of teeth than the bastard file.

  • Use the Correct File.

    1. For material removing: Bastard/Rough
    2. For finishing : 2nd Cut & Smooth

  • The degree of coarseness is greater in longer files, but differences between bastard, second & smooth are proportionate.


  


Various Shapes of Files
  • The shape of filing job will determine the shape of the file to be used. (This referes to the Cross-Section of the file).
 
 


  


Type of Cut for the Material


Type of Cut For the Material
Steel Cast Iron Brass Bronze Hard Plastics Wood Aluminium, Spongy Material Lead
         
Remarks:
  • For smooth surfaces. All saw filing, lathe filing, adjustment jobs.
  • Set of parallel rows of teeth. These files are used with high pressure to produce sharpness & smooth finish on saws.

Type of Cut For the Material
Steel Cast Iron Brass Bronze Hard Plastics Wood Aluminium, Spongy Material Lead
     
Remarks:
  • Engineering file for steel and metals.
  • Two sets of diagonal rows of teeth cut in opposite direction, one over the other. Widely used by Bench Fitters in Industries.
  • First set of teeth is known as the overcut, second is known as upcut.
  • Double cut file is used with heavier pressure than the single cut and removes material faster from the work piece.

Type of Cut For the Material
Steel Cast Iron Brass Bronze Hard Plastics Wood Aluminium, Spongy Material Lead
       
Remarks:
  • Soft material, wood.
  • Leaves a rough surface.
  • Contains a series of individual teeth. This produces a rough surface and is used primarily on wood, aluminium and lead for faster material removal.


Type of Cut For the Material
Steel Cast Iron Brass Bronze Hard Plastics Wood Aluminium, Spongy Material Lead
   
Remarks:
  • Soft material, soft sheet metal.
  • Leaves a very smooth surface.

Type of Cut For the Material
Steel Cast Iron Brass Bronze Hard Plastics Wood Aluminium, Spongy Material Lead
         
Remarks:
Aluminium is divided into:
  • Filing roughness from aluminium castings
  • Filing sheet and bar aluminium
  • Filing aluminium alloys.

Type of Cut For the Material
Steel Cast Iron Brass Bronze Hard Plastics Wood Aluminium, Spongy Material Lead
         
Remarks:
  • Brass is difficult to file, because it is softer than steel, but rough. This demands teeth that are sharp.

Type of Cut For the Material
Steel Cast Iron Brass Bronze Hard Plastics Wood Aluminium, Spongy Material Lead
         
Remarks:
  • For lead is a shaving or floating principle for which the file is designed.


  


The right type of cut for the Material

  Steel Cast Iron Brass Bronze Hard Plastics Wood Aluminium, Spongy Material
Double Cut
Engineering file for steel and metals
   
Single Cut
For smooth surfaces. All saw filing, lathe filling, adjustment jobs.
       
Milled Teeth
Soft Material, soft sheet metal.
Leaves a very smooth surface.
 
Rasp Cut
Soft material, wood.
Leaves a rough surface.
     


  



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