1. What does HRc mean?
2. Where can I purchase Friedrich Dick products?
3. What is the difference between precision files and engineers’ files?
4. What does the “cut” of a file mean?
5. What is the difference between the cut of a file and the cut of a rasp?
6. What is the difference between the German scale of cut and the Swiss scale of cut
7. What is the difference between cross cut and single cut?
8. Is it possible to recut my old file?
9. Which hardness do Friedr. Dick Files have?
10. Which criteria do I have to consider to find the right file?
11. I do not have the Friedr. Dick item number for the required file. Which details do I have to name in my orders?
1.
What does HRc mean?
HRc means Rockwell which is a common international scale unit for the hardness of technical surfaces. HR = Hardness according to Rockwell. c = cone, as the hardness test will be effected with a diamond cone.
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2.
Where can I purchase Friedrich Dick products?
Please use the contact form for enquiries, giving us the following information – What product are you interested in? And what is your postcode? We will send you a message telling you where to find your local dealer. Kontaktformular
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3.
What is the difference between precision files and engineers’ files?
Precision files:
Our precision files are made and controlled to our traditional works standard and German Scale of Cuts. Our range of precision files includes files and rasps (including needle files, riffler files and rasps, escapement files, etc.) of very fine cuts (in some cases up to cut 8).
They are used for precise workings in tool making, fine mechanics, jewellery industry or training centers. They are perfect for finishing and reworking rough workpieces to result in fine and even surfaces.

Engineers’s files:
In our range of engineers’ files you will find files and rasps (including key and saw files etc.) for general and rough file workings. These favourable alternatives to precision files are manufactured according to DIN and available in the most popular cuts 1, 2 and 3.
Engineers’ files are particularly advised for steel, iron, nonferrous metals in industry, trade and hobby.
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4.
What does the “cut” of a file mean?
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
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5.
What is the difference between the cut of a file and the cut of a rasp?
Files are normally cut with a cross cut (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, which is an advantage when sharpening saws.

In case of rasps the teeth are cut point-shaped with a chisel. 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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6.
What is the difference between the German scale of cut and the Swiss scale of cut
The cut of a file can be defined according to the German scale of cut or the Swiss scale of cut.

German scale of Cut
According to DIN8349 / ISO234/2 1982E the number of teeth is counted parallel to the file axis.

Swiss scale of Cut
In case of the Swiss scale of cut the number of teeth are counted in a right angle to the file axis.

On demand we can provide you a comparison chart of the German and Swiss scale of cut.
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7.
What is the difference between cross cut and single cut?
The single cut comprises cutting teeth located in parallel with each other and diagonally to direction of the file axis.

The cross cut is obtained by means of two cuts into the face of file, on which the overcut (which is cut first) and the subsequently cut upcut are crossing each other. Similar to the single cut, the upcut represents the cutting teeth, while the overcut serves the purpose of subdividing the teeth of the upcut into many small teeth which then serve as chip breakers.

Single cut files are suitable for sharpening saws, because the teeth of the thin and easily vibrating saw blades are best filed with smoothly operating, uninterruptedly cutting teeth.

Cross cut files are used for filing larger surfaces. The cross cut provides the file with good guiding characteristics.
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8.
Is it possible to recut my old file?
In the past, after becoming dull upon use, files were often recut by grinding off the old cut and applying a new cut. The price for such a recut file was lower than that of a new file, as high expenses for raw material and production could be safed. Due to the high rise in labor cost this is not profitable anymore and today it is not possible to integrate this in serial production.
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9.
Which hardness do Friedr. Dick Files have?
DICK precision files have a hardness of 65-67 HRc, DICK engineers’ files about 64-65 HRc. Due to a special coating precision files are also available with a hardness up to 72 HRc.
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10.
Which criteria do I have to consider to find the right file?
a) for which material do I need the file (metal, wood, plastic, etc.)?
b) how much material should be removed with the file / how coars should be the file (coarse / middle /fine)?
c) which length of files do I need?
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11.
I do not have the Friedr. Dick item number for the required file. Which details do I have to name in my orders?
For example:
- Quantity
  • > 10 pieces
    - Type of File
  • > Engineers’ files
    - Profile
  • > hand
    - Length
  • > 200 mm
    - Cut
  • > cut 1
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