Martynas Valunas's homemade table sawMartynas Valunas writes:
Here are some pictures of the table saw that I built.
I started with the
arbor. After many considerations (as it turned out - not enough) I came
up with this idea and went to a local metal turner, who made this
arbor for me.
The arbor is very simple and convenient to mount, but it's not good: two ball bearings are pressed into a solid piece of steel that acts as a pulley for a V-belt and flange for a saw blade. Inner diameter of ball bearings is 12mm which is the worst part of this design because the main shaft (a M12 bolt) is too thin to be sturdy enough. In the beginning I had a lot of belt vibrations, which caused the saw bade to vibrate. After I got rid of them I use the saw quite successfully.
Progress of lifting and tilting mechanism. I used 22mm steel rods from car shock absorbers as glides. 4pcs cheap Chinese linear ball bearings (which had lots of play, so I had to shim them so that they had tension against all sides) are pressed in a piece of oak along with two M20 nuts for threaded rod. I put those nuts so that the threaded rod would turn easily, but have no play. Where the threaded rod exists the lift mechanism there's a big ball bearing sandwiched between two thin nuts to act as a thrust bearing. Lower down on that rod goes the last piece - a small gear.
The whole assembly can slide up and down pushing only on one end. At first I used only one bearing on each bar which didn't work out. The mechanism would not move parallel and it would jam. Then I added one more linear bearing for each bar and butted them against each other to get 15cm of bearing length, which allowed the sliding motion without binding.
Above right, you can see the finished lift mechanism being mounted on hinges. The area that gets mounted on a hinge is circled in red. I also include an image from the SketchUp model, because I don't have a photo of a completely finished mechanism and I figured that it could be hard to see what is where.
Tilting on my saw is very hard. It takes time to set it correctly because you need both hands on that handle and no hands left to hold the angle while tightening. I saw John Heisz's table saw was made with the same type of tilt and I thought it couldn't be that bad, so I made mine this way. Now I wouldn't do that.
The saw after use for couple weeks. The fence is made from the same 80x40mm tube with cam-lock which doesn't work as well as commercially made ones, but it's good enough for me. I also made big drawer for sawdust which turned out to be a great idea.
See also: Martynas's bandsaw mill
More homemade table saws:
Hector Acevedo's homemade tablesaw
Dad's homemade tablesaw
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