Bengt Carlen photography

Bengt Carlen photography

Mortise & Tenon

We begin this segment of the program making a set of ‘Krenovian’ sawhorses. We begin with stock which has been rough milled previously and has had the opportunity to settle. We prepare a story stick with our dimensions.The stock is milled to final thickness and width using the jointer, bandsaw and thickness planer, leaving a small margin for hand planing. The stock is then cut to length using the table saw, taking into consideration protruding tenons, steps and recesses. 

The mortises are carefully laid out using a story stick, and a small sliding square. The mortises are then cut using a horizontal boring machine fitted with an end mill. Care is to be taken here to work within our lines. Using the mortises as gauges we cut the shoulders for our tenons on table saw. The cheeks are cut to a very close fit on the bandsaw, at which time we return to our bench and fit each of the tenons to their corresponding mortise using chisels, knives and files. The ends of the protruding tenons are pillowed using our hand tools, and kerfs are then cut to accept the wedges. The Notches are cut at the top of the legs using the bandsaw and cleaned up with a chisel. A dowel is bored on the horizontal boring machine. Surface preparation and edge treatment is completed using our fine planes and spokeshaves. 

The saw horses are assembled in a thoughtful sequence. Once out of the clamps, glue is removed. The top rail is fitted using our planes and the joint is fitted for the dowel. The sawhorses receive a final once over where all edges are eased using our block plane, spokeshave, chisels and files. 

Impractical Studies