This is a working model of a gearbox it has 5 gears plus reverse(not yet implemented) it needs ten 3d printer old bering
In the contest Mechanical Marvels
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updated September 27, 2022

Description

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Car gearbox

 number of teethratio
1st gear45-153:1
2nd gear40-202:1
3rd gear36-241,5:1
4th gear30-301:1
5th gear20-400.5:1
reverse gear33-16-113:1

Necessary

Berings

To print this model you need 10 berings. You can use this old berings from your 3d printer, if you don't have them, it's time to change them :).

You have to remove the plastic from one of these, like that.

 

 

Sand paper

If dimensional accuracy of your 3d printer is not perfect and shaft is too wide to fit in the bering, you can use sand paper.

 

 

Thread

If shaft is too thin or you have sanded shaft too much, you can wrap thread on the shaft between the gears as a thickness.

 

Pice of plastic wire / toothpick

You need a peg to join output 1, output 2, output 3 and output 4 model. You can use a toothpick or the plastic wire, but you need to heat it and stretch it to make it thinner.

 

Slicing Tips

  • It is recommended to use raft to limit the elephant foot effect.
  • Use 20% honeycomb infill.
  • Use supports for output shaft gears and counter shaft crankshaft.
  • !! Highly recommended !! For models like this use a height range modifier.
    • 1.
    • 2.
    • 3.

 

  • The high speed, pattern and heat make a bad print.
  • The tiny hole in the middle and the concentric pattern limits extrusion's inaccuracies.

Assembly

Counter shaft
 counter 2ndcounter 1stcounter 4thcounter 3rdcounter reversecounter 5th 
counter 1counter 2counter 3counter 4counter 5counter 6counter 7
Output shaft

Insert berings in 1st, 2nd, 3rd, 4th and reverse gear and bering without plastic in 5th gear.

Make sure you put the blocker ring on the right side.

Gear order2nd1st4th3rdreverse5th
Last step

Insert the shafts in the case.

 

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The author marked this model as their own original creation.

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