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thehans

45 Degree Helix Gears (right-angle drive)

by thehans Jun 2, 2018
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Hello all, does anyone know why the customizer gives an error? After i click on "Open in Customizer" you see the page come up, but at the bottom, below where we enter our numbers, it says: "We're sorry, but something went wrong."

I can't get it to allow me to customize for the two gears that i need, which is a simple 90 change of direction on a volume knob on a speaker.

Thanks all :)

Could you add different center hole bore shapes other than round. (hex, square, D shafts)???

One of the things that we learned in machine shop classes, is that this drive requires thrust bearing. Which is why my original design had side load bearing in it. However, after the fact, I realized that this was overkill for a fidget.

Yeah thrust bearings would be ideal. But the axial forces in my use-case are low enough that I think 608 skate bearings will be fine for quite a long time.

Seems like there would be a lot of friction in this design vs a worm gear.

Worm gears are generally for much higher reduction ratios than I was looking for in this case. Also worm gears and can present difficulties printing with very shallow angle on the worm drive spiral. With these helix gears the slope is never more extreme than 45 degrees, which should be manageable by any printer.

Why not use a set of bevelled gears? Much less friction, and with a herringbone pattern , no axial load on the bearings.

I considered bevel gears at first, but it would have been more difficult to work out a way to layout and mount everything. The main difference being that bevel gears have the shafts all on the same plane, while the helical gears have a separation between gear shafts, which allows a lot more flexibility in mounting options.