Ellsworth to Wolverine Jig

The project – This jig enables the use of the David Ellsworth grinding jig to be used with the Wolverine grinding jig.

Step 1 – Cut a piece of hardwood, I used white oak, 20” long x ¾” x ¾”.
Step 2 – Chamfer all edges with a sanding block until the wood slides freely into the Wolverine jig.
Step 3 – Draw a line about 3 ½” from one end of the board. Using the table saw, set the blade at 45 degrees and make a cut about 1/3rd of the thickness of the wood and stop well short of the line.
Step 4 – This is how the saw cut should look.
Step 5 – Using a bandsaw, finish cutting the 45 degree to the line then cut off the small piece square to the saw kerf.
Step 6 – This is how the cut piece should look.
Step 7 – Glue a 3 ½” x 2” x ¾” piece of hardwood to the notch cut into the first board and clamp well.
Step 8 – This is how the glued and clamped pieces should look.
Step 9 – After the glue dries put the jig into the Wolverine jig and measure the center of the grinding wheel to the top of the jig top; the measurement is 3 ¼”. The Ellsworth grinding jig leg tip needs to be 4” to the center of the grinding wheel and will be adjusted for in the next few steps.
Step 10 – Draw a line about 1 1/8” from the end and continue it down one side. Draw a line 11/16” from the top, length wise from the vertical line towards the back of the block.
Step 11 – On the top of the glued block mark a center line across the existing line from step 10.
Step 12 – Drill a ¼” hole on the top of the block at the center line. The hole should be exactly ¾” deep. This ¾” deep hole added to the 3 ¼” measured height from step 9 gives the needed 4” for the Ellsworth jig leg. It sounds a bit confusing but it works.
Step 13 – Cut at the line on the length of the block then cut about 1/16th” from the vertical line to look like the photo.
Step 14 – This is what the top of the block should look like when cut. The drilled hole is just below the saw cut. Sand all the edges to a nice chamfer.
Step 15 – For the second part of the jig cut 2 pieces of wood about ¾” x ¾” by 8” plus. The wood size is not critical here.
Step 16 – Cut one end of each board for a lap joint.
Step 17 – Making sure the 2 boards are perfectly square to each other, glue and clamp well.
Step 18 – After the glue dries measure exactly 7” from the outside corner to the end of both lengths of wood and cut off.
Step 19 – Insert the holding jig into the Wolverine jig then place the 7” jig on top of the notch in the holding jig and move towards the grinding wheel until it touches. Lock the Wolverine jig handle and remove the 7” jig.
Step 20 – Place the Ellsworth jig with the turning tool attached into the jig pocket hole and grind the famous Ellsworth grind on the turning gouge.