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New FAQ Jul 2020

For section "Tool Material Grades"
QUESTION
What is the difference between CBN and PCBN?
ANSWER
Both CBN and PCBN relate to Boron Nitride (BN) - a polymorph material formed by two chemical elements. Boron Nitride exists in different crystal structures. One is cubic and the BN in this structure is Cubic Boron Nitride (CBN).
As a cutting tool material, CBN is used as a polycrystalline compound, where CBN particles and an added binder are sintered together. The material produced is "Polycrystalline CBN" or simply "PCBN". The percentage of CBN can vary in different PCBN grades. In the context of cutting tools, the commonly used abbreviations "CBN" and "PCBN" may be considered as synonyms.
For section "Milling"
QUESTION
What is the difference between "wiper flat" and "wiper insert"?
ANSWER
A wiper flat is a small minor edge on a regular indexable insert in milling cutters to improve the quality of a machined surface. It is often referred to as a “wiper.”
A wiper insert is a specially designed insert were the wiper flat is significantly larger than for a standard insert. When mounted in a milling cutter, the wiper insert protrudes 0.05…0.07 mm axially relative to a regular inserts. A wiper insert "smooths down" the machined surface, noticeably improving surface finish.
For section "Holemaking"
QUESTION
Do the terms "step drill" and "subland drill" mean the same?
ANSWER
Not exactly. A step drill is a drill with cutting areas of different diameters to generate a step-diameter hole in one pass. A subland drill is a solid twist step drill, which features different lands for each diameter. However, a step twist drill has the same land along the drill body. Usually, there are two drilling areas in a subland drill. A subland drill is a sub type of step drill.
For section "Solid Endmills"
QUESTION
What are the applications for ISCAR's lens- and oval-shape solid carbide endmills and MULTI-MASTER exchangeable heads? (Related to MULTI-MASTER - 466)
ANSWER
The lens- and oval-shape solid carbide endmills and MULTI-MASTER exchangeable heads are designed for 5-axis semi-finish and finish milling complex surfaces, especially in aerospace, medical and die & mold industries.
For section "MULTI-MASTER"
QUESTION
What are the applications for ISCAR's lens- and oval-shape solid carbide endmills and MULTI-MASTER exchangeable heads? (Related to Solid Endmills - 465)
ANSWER
The lens- and oval-shape solid carbide endmills and MULTI-MASTER exchangeable heads are designed for 5-axis semi-finish and finish milling complex surfaces, especially in aerospace, medical and die & mold industries.
For section "Shop Talk Professional slang"
WORD
Dogbone
MEANING
a narrow double-ended insert, mainly in indexable parting and grooving tools. Typical examples of dogbone inserts are ISCAR's DO-GRIP and HELI-GRIP inserts.
WORD
Rotabroach drill or simply "Rotabroach"
MEANING
a trepanning cutting tool (an annular cutter). The origin of "Rotabroach" comes from the company Rotabroach Ltd, who started manufacturing and marketing such tools in the 1980’s.