Drilling The Shank Hole

When drilling the shank hole, it has to be deep enough for the shaft of the screw and any threads that will be in the front piece. The mast common mistake in drilling the shank hole is to drill it only for the shank (unthreaded) portion of the screw. It has to be deep enough for any threaded portion, too.

That is, the shank hole has to go all the way through the front board, see drawing to the right.

In most cases, you want the shank hole to be the same size as the w idest diameter of the shank or the threads so the screw fits tight against the walls of the hole. (On Lo-Root screws the threads stick out slightly beyond the shank.)

This tight fit prevents the screw from "racking" or bending in the hole so the top piece can't shift in relation to the bottom piece.

However, in some situations, you want the pieces to be able to move independently. For example, when joining a solid-wood top to a cabinet, you want the top to be able to expand and contract with changes in humidity. In thus case, the shank holes are drilled oversize to allow for this movement.

Woodworking Tools and Installation Tips

Woodworking Tools and Installation Tips

There are a lot of things that either needs to be repaired, or put together when youre a homeowner. If youre a new homeowner, and have just gotten out of apartment style living, you might want to take this list with you to the hardware store. From remolding jobs to putting together furniture you can use these 5 power tools to get your stuff together. Dont forget too that youll need a few extra tools for other jobs around the house.

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