Cleveland C46673 Counterbore Pilot 25/32 in High Speed Steel Bright

Pilot for counterbores

This 25/32 inch pilot fits counterbore tools and is made from high speed steel with a bright uncoated finish. It suits machinists and maintenance technicians who need a replaceable pilot for existing counterbore bodies. Builders without a matching counterbore shank cannot use this item. The Cleveland C46673 is sold new as a single component.

Sustained cutting behaviour

High speed steel retains hardness at the temperatures reached during repeated counterboring passes in steel or cast iron. The bright finish provides no coating barrier, so lubrication is required to maintain edge life under continuous feed. The pilot diameter of .313 inch guides the counterbore without binding when the workpiece is held rigid. Chip evacuation depends on the host tool flute design.

Thermal and power characteristics

The pilot itself generates minimal heat because it does not perform the primary cutting action. Friction at the pilot-workpiece interface stays low when cutting fluid is applied and spindle speed matches the counterbore diameter. Power draw is determined entirely by the counterbore cutter and the machine tool. No cooling or noise considerations apply to the pilot alone.