Sandvik Ab

Magnus Aspeby

Goran Pantzar

Per Nilsson

Peter Frank

Rudi Holland-Moritz

Dietmar Kurschner

Erwin Nitz

Klaus Kraft

The invention relates to a tool carrier with a coupling end (2) arranged on the tool machine side and a tool holder (9) arranged on the tool side, a surface (16) with a radial projection being provided internally in the coupling end of the tool machine side, which surface is machineable through the opening of the coupling end of the tool machine side. In said surface (16) is/are provided one or several borings (15) for a static and dynamic balancing of the tool machine side coupling end (2) of the tool carrier. Inter alia, this can provide both a static and a dynamic balancing.

Tool carrier

An indexable cutting insert comprises an upper surface, a bottom surface and side surface extending between said two surfaces. Between two adjacent cutting corners, a rake surfaces is formed such that the rake angle decreases with increasing cutting depth. In this way the cutting edge is reinforced towards a maximal cutting depth. This configuration is favorable, for example, at the machining of materials with a tendency of surface hardening.

Cutting insert with twisted chip surface

Arrangement in a rotatable device to protect against over-tightening

A cutting insert, preferably for milling cutters, comprises an upper side or chip surface, a bottom surface and side surfaces extending between the upper and bottom surfaces. At least one of the side surfaces having a relief surface adjacent to a cutting edge, which relief surface is helically twisted along the cutting edge so that the relief or clearance angle decreases with increasing cutting depth. This arrangement makes it possible to obtain an equally large clearance along the cutting edge even with a negative inclination of the cutting insert in the milling cutter body.

Cutting insert with twisted relief surface

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Sandviken, Sweden

Magnus Aspeby