5 sided wood box mitre saw templates

Templates that can help adjusting the angles on a mitre saw to create a wood box with 5 sides.

The templates are 3d print only, no parts needed, but you need wood and woodworking tools. You probably don't need to print both of the flat 5 sided pieces (flat pentagons)

I used a pine board 18 mm thick and 200 mm wide, It must be about 740 mm long. You need a mitre saw, and I used a little router and sanding paper. You also need glue and tape. The sides lean 20 degrees outward, mitre angle is 76 deg and blade til is 56 ½ deg

Rout the edges on both sides before cutting and sand what your heart desires, keep the sanding dust.

Use the templates to adjust both angles of the mitre saw.

The angles on the mitre saw are confusing, because they are complementary (90 - something? 180 - something?)

Mitre angle (76 deg):

Blade tilt or bevel angle(56 ½ deg):

Now it's time to cut the first cut on the board. Then use the template to figure out which way to rotate the board before cut number two. This saves me from some head scratching, and helps me from not making the second cut the wrong direction:

To find the length of the cut I use the inner length of the pentagon template. There is a pentagon template for 70 and 90 mm. Other lengths are fine, you use the same mitre and blade angles, but need another size for the bottom sheet:

Point mark only:

Remember that this pentagon template is not the mitre angle, so draw a line using that mark with the other template.

I prefer to have a line to cut and to draw it the template comes handy again:

Now you repeat sawing until you have 5 identical blocks:

The 5 pieces needs to have a groove for the bottom plate. I have a 4 mm plywood sheet, and I made the groove 6 mm wide. There is an angle so the groove must be a bit wider than the sheet thickness, but I didn't have a 5 mm router bit:

Depending of the depth of the groove and the distance to the bottom, the size of the plywood pentagon can match the outside of the pentagon template. About 10 to 12 mm “up” from the bottom of the 5 pieces. It's possible to test if the outer edges of the pentagon template is the right size before making the bottom sheet:

The 20 deg. 5 sides helper comes in handy when gluing it together. I also used a lot of tape (wide masking tape), and the three clamps I have:

Let it dry:

It's possible to mix glue and sanding dust (you kept it?) to fill in cracks at the joints