Tooling Line Enables Trepanning on a Mill

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IMTS 2018: Thinbit’s Mill A Groove line of toolholders and inserts consolidate operations and provide quality finish for sealing surfaces. 


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Manufactured by Kaiser Tool Co., Thinbit’s Mill A Groove toolholders and inserts are designed to trepan on a CNC mill. 

According to the company, capability for quality finish makes the tools ideal for sealing surfaces. Other advantages include the elimination of secondary lathe operations for face grooving; a large cross-section that provides strength, and the availability of custom inserts to match the groove form. In addition, groove diameters are concentric to spindle rotation, not table movement.

The inserts do not rotate about their own centers, so the groove can be symmetrical or asymmetrical. Step grooves, convex and concave radius grooves, chamfered edges, angles and special profiles can be made with a single insert.

When machining in 6061 aluminum, the line cuts a groove 0.125" wide × 0.200" deep × 4.98" in diameter in 18 seconds.

The toolholders are designed to work in combination with boring heads and are available in common sizes with straight and 90-degree orientations. 

Inserts are available from 0.004" through 0.150" in 0.001" increments. Major diameters start at 0.300". Inserts are available in sub-micron grain carbide grades for ferrous and non-ferrous materials and HSS for composites and plastics. Inserts can be coated with TiN, TiCN, TiAIN or diamond film. PCD and CBN tipping options are available for hard or abrasive materials.