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Carbide Boring Tools

Carbide Boring Tools

Criterion Machine Works ( has introduced a 0.125-in. diameter, solid carbide qualified length (QL) boring tool to its line of solid carbide boring tools.

These tools feature a repeatable Z-length of ±0.001 in. from a nominal set length.

The company said the qualified length tool’s close tolerance length minimizes machine downtime when changing a tool during a production run. The tools have a closely held locating angle to insure Z- length repeatability.

The locating angle also locates the cutting edge on center for long tool life also reducing machine downtime.

Seventeen different bore diameter and length configurations are available with the new boring tools.

Minimum bore diameters range from 0.050 in. to 0.110 in. The tools bore holes to a depth of 0.700 in. depending on the bore diameter. The qualified length tools must be held in a Criterion qualified length toolholder.

Toolholders are available with shanks of 0.125 in., 0.375 in., 0.500 in., 0.625 in. and 0.750 in., and are designed for use in Criterion’s precision boring heads.

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