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emmets Gear Bearing modified

by mechadense, published

emmets Gear Bearing modified by mechadense Mar 2, 2013

Description

This is a slight modification to emmets gear bearing that makes it post assemblable.

Advantages:
1) Zero clearance possible
2) Multicolor with single nozzle printer possible
3) Seperate prints -> no travell moves -> better surface quality

**edit:** Don't use zero clearance (the *stl's have), increase the tol parameter to at least 0.3mm so the parts can be put together.

Recent Comments

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Sorry, known problem, I should have noted it in the description.
You can increase the tol parameter in customizer or the *.scad source file
MacGyver had success with 0.3mm (see in the makes)
http://www.thingiverse.com/mak...

Hi, I have print all parts and I can't assemble it. Sun or planet are too big... There is a spacial setting ?
Sorry for my english, I'm french ....
Thanks.

I wantet to keep it simple and small so I optet to split the inner one.

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Instructions

**edit:** Don't use zero clearance (the *stl's have) - it turned out assembly becomes almost impossible and it may not turn at all.

1) Print all parts separately (I dissuade from using the print-plate) and the sun gear split in two.
2) Put the planets and half of the sun into the ring.
3) Put the other half of the sun in
4) Screw it together with a threaded rod and two nuts.

For a demo piece my sheet pin can be used to hold it together:
thingiverse.com/thing:42665
Here with fitting parameters:
thingiverse.com/thing:56333

Comments

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galexis on Mar 13, 2014 said:

Hi, I have print all parts and I can't assemble it. Sun or planet are too big... There is a spacial setting ?
Sorry for my english, I'm french ....
Thanks.

mechadense on Mar 13, 2014 said:

Sorry, known problem, I should have noted it in the description.
You can increase the tol parameter in customizer or the *.scad source file
MacGyver had success with 0.3mm (see in the makes)
http://www.thingiverse.com/mak...

Peterthinks on May 29, 2013 said:

You could also split the outer ring gear into upper and lower halves. Slide all the gears into the middle of the first half and then put the other part on top. If the outer ring was wider you could have bolt holes around it or have the gear cut out of a square of material or pillow block shape so it can be used as a kind of thrust bearing. You could even make Emmett's bearing out of metal like this.

mechadense on May 29, 2013 said:

I wantet to keep it simple and small so I optet to split the inner one.

BrandonBlizard on Mar 5, 2013 said:

After hours, i finally got mine together, But the fit was so tight it wouldn't turn. If anyone's interested i used bent wire clips to hold the outer wheels onto the ring. then I counted the teeth to make sure I had the right teeth aligned,( I got one side on a few times but the outer gears were uneven, ) then with a drill bit through the center hole I worked each tooth into each gear.I repeated for the back side, and i really had to force the last tooth. then I squeezed it all together with a clamp.

mechadense on Mar 5, 2013 said:

Thanks for the Info. So a too tight fit can block it completely :( .
I really need to make the gears slightly conical to make assembly more managable.

MacGyver on Mar 3, 2013 said:

Did you leave the "EL" on there as a tribute to Emmett?

mechadense on Mar 3, 2013 said:

I shortly thought about removing it, but it didn't seem considerate.

pauloblank on Mar 2, 2013 said:

Great idea, thanks for sharing! I´ve printed the original one, but the gears get sucked together, no way of cleaning it. Your design will surely work for me.

laird on Mar 2, 2013 said:

That's clever. Probably a better design mechanically but doesn't have the coolness of printing all assembled.

mechadense on Mar 2, 2013 said:

Thanks, I want it more as a useful functional piece than a cool demo piece thus I made tis mod.

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