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An adjustable bit for cutting tongues or grooves in a wooden workpiece that includes first and second cutter members adjustably mounted on a drive shaft, a plurality of spacer elements selectively mountable on the drive shaft to vary the axial spacing between the cutter members. At least some of the

An adjustable bit for cutting tongues or grooves in a wooden workpiece that includes first and second cutter members adjustably mounted on a drive shaft, a plurality of spacer elements selectively mountable on the drive shaft to vary the axial spacing between the cutter members. At least some of the spacer elements preferably having varying thicknesses, and a ball bearing pilot member may be one of the spacer members. The cutter members may be formed for cutting a groove in the workpiece, or formed to cut a tongue in the workpiece.

대표청구항 ▼

1. An adjustable bit for cutting tongues or grooves in a wooden workpiece which includes:(a) an axially extending drive shaft; (b) a first cutter member mounted on said drive shaft and movable along the axial length thereof; (c) a second cutter member mounted on said shaft and movable along the axia

1. An adjustable bit for cutting tongues or grooves in a wooden workpiece which includes:(a) an axially extending drive shaft; (b) a first cutter member mounted on said drive shaft and movable along the axial length thereof; (c) a second cutter member mounted on said shaft and movable along the axial length thereof; (d) a plurality of spacer elements selectively mountable on said shaft intermediate said first and second cutter members to vary the axial spacing therebetween, wherein said plurality of spacer elements includes a ball bearing pilot member disposed between said first and second cutter members to provide a guide surface for said workpiece as it is being cut by said adjustable bit; and (e) a cap member removably mounted on said drive shaft to permit at least one of said cutter members to be mounted on and removed from said shaft, and to permit one or more of said spacer elements to be mounted on and removed from said shaft, said cap member having a plurality of fixed positions hereon for holding in place said first and second cutter members and said spacer elements therebetween, whereby said adjustable bit can be used to cut grooves or tongues of varying thicknesses in said workpiece.