Files and rasps
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How to select the perfect file A = Cut length or total length, see special remarks on the file pages. B = Width of flat side C = Thickness of narrow side |
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Dimensions Normally the measurements of lengths »A« are the cut lengths. In some cases lenght A is the total length. Deviations from the standard will be marked. Consider the size and material of your workpiece when choosing the length of a file. All dimensions have to be seen inclusive manufacturing tolerances and can be subject to technical changes in manufacturing (see page 8). The sections are to be measured on the widest point of the uncut file piece. |
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The cut The coarseness of a file is marked by a cut number. The coarser a file the more material will be removed. Example: Cut No 1 = coarse / bastard, for rough preliminary work and much material removal Cut No 2 = middle / half smooth, for moderate material removal Cut No 3 = fine/smooth, for finishing work or little material removal Therefore, when choosing the cut the application, the material and the desired material removal have to be considered. The cut number is directed towards the type of file, the length and the number of teeth per centimeter. To determine the number of teeth of a file (German Scale of Cuts) you have to count the number of teeth parallel to the file axis: |
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Normally files are cut with a crosscut (A) (i.e. with an up and over cut). The up cut is the cutting one, the over cut is the chip breaker. By this crosscut the file achieves a good guidance. In contrast a lot of special files have a single cut (B), which is an advantage when sharpening saws. In case of rasps the teeth are cut point-shaped with a chisel (C). Thus the cut becomes very coarse, which is especially used for rough surface finishing and much material removal of wood, aluminium etc. |
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The tolerances are as follows the tolerances are as follows: In the width (in mm): <4 = +0,2 / -0,3 >4-15 = +0,3/-0,5 >15 = +0,3/-0,7 In the thickness (in mm): <2,5 = +0,2 / -0,3 >2,5-4 = +0,3/-0,5 >4 = +0,3/-0,7 Except round files (in mm): <3 = +0,15/-0,1 >3-6 = +0,2/-0,1 >6 = +-0,2 To get the real dimensions it is necessary to add 0,01 - 0,4 mm per cut side. We reserve the right to make changes without prior notice. |