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MASTERED HOLEMAKING
The Machinist
|September 2022
Iscar's three-pronged principle of the Multi-Master family was based on the face contact between a carbide head and tool, centring the head by use of a short taper, and securing the head in the tool body by use of a threaded connection.
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There are two types of heads which create the cutting section of the Multi-Master tool. The first type is similar in its shape to a multi-flute solid carbide tool but differs in overall and cutting-edge lengths. Increasing the number of flutes on the cutting head makes cutting more stable and productive. The heads of the first type are produced from stepped cylindrical blanks by use of a grinding operation. The heads of the second type are shaped beforehand by pressing and sintering with a minimal oversize. Additional grinding defines the final shape of the Multi-Master head and its accuracy. The heads of this type have only two flutes characterised by high strength. This facilitates increased feeds per tooth in comparison with the heads of the first
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