Making Wooden Screws

There are several reason why you would want to learn how to make wooden screws. Wooden screws have many different applications, from cider presses to bar stool screws, and they can give your workbench a more traditional look.
I have found the following steps to be the simplest way to make wooden screws, it may not be the best way, but it’s simple and effective. Traditionally you would use a screw box that has a V shape cutter that cuts the threads to form a screw. I have found its hard to find a screw box in bigger diameters, so to make the size screws I like I use a router and router bit.
For demonstrative purposes, I chose to use a substandard wood for making the screw. When making wood screw for your bench, or other uses, I would suggest using a harder dense wood, such as rock maple.
To make the jig in this tutorial,  I chose to use off cuts that I had lying around. I would highly suggest that you use better wood than I do in this tutorial.
To get started you will need: a table saw, a drill press, drill bits, ruler, dividers, and a square.
Wooden screws
Wooden screws
To make the guide block, I used a block 2″ thick, 4″tall and 12″ long. In the last tutorial I used birch and here I am using fir.
Wooden screws
First, connect the four corners with pencil lines to find the dead center of the block. Then proceed to drill a 2″ hole in the center, for the dowel to fit in. This will help guide the dowel while cutting the threads.
Wooden screws
Using a 45 degree router bit for the cutter will ensure the same angle as the thread inside our threaded block. .
Wooden screws
The router bit is 9/16″ wide. In order to give a little room for fine tuning
I use a 5/8″ drill bit to bore the hole on top of the block where
the bit will be placed.
Wooden screws
Wooden screws
Then measure the distance from the outside of the threaded block to the center of the first thread.
Wooden screws
Next transfer that measurement to the top of the block.
Wooden screws
Wooden screws
This is where the hole is made for the router bit. I will drill the hole after
I secure the guide block to the threaded block.
Wooden screws
Wooden screws
Clamped the guide block to the threaded block.
Wooden screws
Making sure to keep everything is square.
Wooden screws
Marking the location for some dowels and screws.
Wooden screws
Mark the section of thread that needs to be removed to allow the
dowel to make contact with the router bit, it there was any thread
in front of the router bit it would stop the dowel from entering into the cutter.
.
Top hole is drilled along with the four holes in front.
Then a 1/4″ drill bit for the holes in front but only went down
until it touched the threaded block.
Barely touching the block with the 1/4″ bit I then use the marks
to drill 1/2″ holes caddie corner to one another for some dowels.
Only glue the dowel pieces to the threaded side of the jig, this
allows proper alignment when both blocks are put together.
The other two holes receive threaded inserts, that way both pieces can be screwed together.
Add some screws and washers, then put it together.
Install the router.

 

Adjust the router bit to the same depth of  the thread, so the router can be
screwed into place.
Marking spots to screw the router to the jig.
After marking where the screws go. Drill only one of the
spots and then put it back together.
Having only one screw holding the router down. The router can be moved slightly.
Wait to put the other screw in routers base plate until you test it first, that way you can make
small adjustments and fine tune it.
If  you are worried about the router plate cracking, or it doesn’t feel safe
enough go, ahead and put temporary screw on
the non threaded side, so after your adjustments
you can put another permanent screws on the threaded side of the jig.

 

Wooden screws
Time for some test cuts.
Wooden screws
Test cuts were good so the only things left is to make a space
for the shavings to fall through and add two pieces on the back, so it can
be clamped in a vise.

 

Wooden screws
Here is the location, you will need to make a spot for the
shavings to fall through.

Wooden screws

 

Wooden screws
Now you have a nice screw, not perfect but nice.
Wooden screws
There is another way to make threads using the router that will limit the amount of chip out, that can occur with the method above. If there is enough interest and feed back in the other method I will make another tutorial showing how to do it. Leave a comment if you would like more on wooden screws and leaving positive feed back is always welcome.