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Gear pair

Two involute spur gears made to mesh, from the teeth on each and one tooth size. Shows the ratio and how far apart to set the axles.

  • 2.20 x 2.20 in

    Shown in Delrin (acetal), .125 in

    Driving gear, 20 teethx1

  • 4.20 x 4.20 in

    Shown in Delrin (acetal), .125 in

    Driven gear, 40 teethx1

All templates
Ratio
2 : 1
Centre distance
3 in
Gears
in

Pitch diameter divided by teeth, the same on both gears. 0.1 in is 10 diametral pitch.

Bores and plate
in

0 for no bore.

in

0 for no bore.

A plate with an axle hole for each gear, set exactly the right distance apart.

Set the axles exactly the centre distance apart. The laser's cut takes a hair off every tooth, so the pair runs with a little play and needs no extra clearance.