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New FAQ Jul 2021

For section "MULTI-MASTER"
QUESTION
What is the main field of application for the ISCAR MULTI-MASTER exchangeable flat bottom drilling head?
ANSWER
The application range of these heads is not limited to making relatively short holes with a flat bottom (in-depth of up to 1.2 of the hole diameter). The MULTI-MASTER exchangeable flat bottom drilling head ensures efficient drilling on slanted and curved surfaces, directly on solid material without center- or pre-drilling, making it possible to produce half holes, counterboring and spot facing.
QUESTION
Is it necessary to reduce the feed rate when drilling slanted surfaces with the MULTI-MASTER exchangeable flat bottom drilling head?
ANSWER
Yes. When drilling slanted surfaces, the feed rate should be adjusted according to the angle of a surface inclination as recommended in the corresponding ISCAR guides. It can be roughly estimated that the feed reduction is 30-50% of a common value, depending on the angle of inclination.


For section "Engineering Materials"
QUESTION
When specifying materials to be machined, ISO standards use the letter “P” for steel, “M” for stainless steel, and “K” for cast iron. These letters are not directly associated with the material. However, when designating non-ferrous metals, superalloys, and hard materials, the ISO standard uses the letters” N”, “S” and “H”, which are appropriate acronyms. Can you explain a reason?
ANSWER
ISO adopted the material classification principles that were developed in Germany, and therefore, the origin of the identification letters is in German. For example, the letter “P” relates to the German word «Plastisch» (plastic), "K" to «Kurzspanend» (produced short chips), and "H" to "Hart" (hard), just to name a few.
QUESTION
Why does ISCAR continue to use outdated designations such as GGG for nodular cast iron when specifying engineering materials in different guides and ITA software?
ANSWER
The answer is very simple, outdated designations are still common in the industry and used by the manufacturer. Designations that begin with "GG" for gray cast iron, "GGG" for nodular cast iron (according to the old DIN standards), or "En" for steel (according to the old BS standards), have been replaced by other designations in their appropriate standards. However, despite the newer and formal changes, various outdated material designations are the everyday language of the professional world. Therefore, modern designations have been simultaneously preserved with a few outdated designations, which remain popular among manufacturing professionals.
As a side note, a similar situation may be observed with commercial names. Some materials are well known by their trademark and not by their standard designation.


For section "Shop Talk Professional slang"
WORD
6 and 9
MEANING
the shapes of curled chips, which are usually short, are often considered the most desirable in production.
WORD
Bird's nest, birds-nest chips
MEANING
a clump of entangled metal swarf formed by long unbroken chips during the machining process.