This techique is described on the site of Billy Billy STILNER.
You have a 9-pinion teeth 2.2 mm in diameter, a toothed wheel of 60 teeth and 12.4 mm in diameter.
The following table obtained :
You see that the space between the lines is 6.9 mm.
How to measure such a distance with accuracy? : Billy STILTNER gives us the solution :
We just have to apply.
On a piece of paper you draw a segment of 69mm.
With the caliper view the length of 6.9 mm:
With the magnifier, adjust the spacing of spikes and opening up slide:
You run 10 times the length of the segment, just as it should:
By making sure that the position of branches of the divider on this gauge mark on a sheet of plywood 8 / 10:
The plywood is marked:
The plywood is marked (other method, that of MPS) :
The plywood is drilled with a lock of 8 / 10:
We therefore: a plate of plywood breakthrough, a pager motor Didel MK4-8 with a gable G209-071, a landing from a syringe needle inside diameter of 0.82 mm, a rod music wire 0.8 mm .
With the reamer adjusting the location of the bearing :
You sets up the bearing with a toothstick :
Below are the different reamers (they are available here),
the location of the engine is accomplished :
You cut a length of 2 to 3 mm ID of teflon 6 / 10:
You expand with a drill of 0.8mm on a few milimetres:
You put the music wire 0.8 mm in the axis of the spur :
You slid all in the bearing already in place on small pinionon the side of the bearing :
You set the end of the tube that will serve this stop
View Profile:
The gear is testing with two battery of 1.5 V:
Finally you fix the propeller previously manufactured :
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