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Wooden Gears: a Cogwheel and a Lantern Pinion
English
John M · CC BY-SA 2.0
Woody

Yaremwe na

Woody

14. Ukwakira 2026NO
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Wooden Gears: a Cogwheel and a Lantern Pinion

Mill gears were long made of wood. A lantern pinion is two discs joined by a ring of rods; its teeth are only rods set in drilled holes, so it needs simple tools. A cogwheel is a disc with wooden cogs set round its face. Mark both on the same pitch, drill and glue in the cogs and rods, and let the wheel drive the pinion. The picture: a lantern pinion of wooden rods meshing with a cogged wheel in Chesterton Mill.
Hagati
A day

Amabwiriza

1

Mark out

With the dividers, scribe the cogwheel disc and two pinion discs on beech, and the pitch circles for the cogs and rods (step 5). Step off equal spacings round each pitch circle.

Ibikoresho by'iyi ntambwe:

Imbaho za beechImbaho za beech1 igice

Ibikoresho bikenewe:

Ikizunguruka gifite imitwe ibiriIkizunguruka gifite imitwe ibiri
Umurongo w'ipimaUmurongo w'ipima
2

Cut the discs

Saw the discs out with the coping saw and rasp them round to the line. Drill the axle hole at each centre.

Ibikoresho bikenewe:

Umucumita w'ImigororwaUmucumita w'Imigororwa
Ikuburo ry'ibitiIkuburo ry'ibiti
Igikoresho cyo gutobora gikoreshwa n'intokiIgikoresho cyo gutobora gikoreshwa n'intoki
3

Set the cogs

Drill a hole at each mark on the face of the cogwheel and glue in a short dowel cog, all standing the same height. Round their tips a little.

Ibikoresho by'iyi ntambwe:

Udukoni tw'ibiti bikomeyeUdukoni tw'ibiti bikomeye24 ibice
Ifatanyo ry'uruhu rw'inyamaswaIfatanyo ry'uruhu rw'inyamaswa20 g

Ibikoresho bikenewe:

Igikoresho cyo gutobora gikoreshwa n'intokiIgikoresho cyo gutobora gikoreshwa n'intoki
Umusumeno w'umugongoUmusumeno w'umugongo
Isafuriya ebyiri zo guteka ku maziIsafuriya ebyiri zo guteka ku mazi
Urupapuro rwo GusyaUrupapuro rwo Gusya
4

Build the pinion

Drill matching holes in both pinion discs, glue rods between them to make the cage, and check that it runs true on its axle. Mesh it with the wheel: the wheel drives, the pinion is driven.

Ibikoresho by'iyi ntambwe:

Udukoni tw'ibiti bikomeyeUdukoni tw'ibiti bikomeye8 ibice
Ifatanyo ry'uruhu rw'inyamaswaIfatanyo ry'uruhu rw'inyamaswa10 g

Ibikoresho bikenewe:

Igikoresho cyo gutobora gikoreshwa n'intokiIgikoresho cyo gutobora gikoreshwa n'intoki
Umusumeno w'umugongoUmusumeno w'umugongo
Isafuriya ebyiri zo guteka ku maziIsafuriya ebyiri zo guteka ku mazi
5

Pitch and ratio

Gupakira ikaye ya Jupyter…

Ibikoresho

3

Ibikoresho bikenewe

8

Iki gishushanyo gikora

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Agateganyo

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