Mini Hand Powered Table Saw v3 - Four Gears
This is the Four Geared version of my Mini Hand Powered Table Saw. The gear ratio is in this one is about 1:3 so for every turn of the crank you make, the blade will rotate 3 turns. It spins faster than the first two versions but it is not as strong and gears will pop out of place if it encounters too much resistance.
This version makes some improvements over the other two versions. By using four gears instead of just two, I didn't need to have one gear sticking through the top like in the previous version. The two extra gears are mounted between a special arch and one of the sides of the table. I also redesigned it so I could remove of all the outside washers where the cranks went through the sides. It is a much cleaner look.
Like the previous 2 versions, I printed everything without supports except the Crank assembly and the Top. My Monoprice Select Mini printer was even able to print the Table Bottom without supports, though just barely. Some of the layers began curling under before it was able to bridge the gap and close the tops of the largest openings.
The half circle opening in the Crank is the hardest to clean out. I eventually added a drop of glue to keep it on the Crank shaft otherwise it would fall off after rigorous cranking.
When attempting to cut something, the Table should be held in place with a small clamp or a second pair of helpful hands.
Check out the video to see it in action. https://youtu.be/9sZSOpMYHnE
Printer:
Monoprice Select Mini
Rafts:
No
Supports:
No
Resolution:
0.2mm
Infill:
10%
Notes:
ASSEMBLY INSTRUCTIONS (See Exploded View Picture)
Parts may need some clean up for the pieces to fit together. The Blade, Largest Gear and Smallest Gear should fit tightly on their shafts while the two middle size Gears and their Washers should be a looser fit.
You need to print two of the Small Shafts and four of the Washers.
Set the Table Bottom in front of you so the "arch" part inside is on the right.
Put each of the two middle size Gears onto a Short Shaft with a Washer and put them into place between the right Side and the Arch. Put each middle sized Gear onto a small shaft with a Washer on each side of it. The bigger of the two medium size Gears should be placed into the Table Bottom first. It goes in the lowest set of holes. The smaller of the two middle Gears goes in next and fits into the two holes farthest from you on the Arch. These two Gears are a bit of a pain to get in so just be careful and go slow because too much pressure on the Arch could snap it off.
Add the Handle over the thin part of the Crank. This should fit tightly enough not to come off but loose enough that you can turn it in place.
Slide the Large Gear onto the Crank Shaft and then from inside the Table Bottom, angle the end with the Large Gear into the hole closest to you on the right and snap the other end into the opening on the left.
Slide the Smallest Gear and the Blade onto the Blade Shaft and then angle the end with the Small Gear into the Table Bottom into the last hole on the right and slide the other end down into the hole on the left.
Add the Table Top. If needed, the Blade and Gears can all be adjusted along the shafts.
And you are ready to go!
