worm gears for antenna drives

[Don Latham]

Just go to AliExpress and search on NEMA23 Worm Gear. Amazing prices.

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Don Latham
PO Box 404,
Frenchtown, MT, 59846
406-626-4304

[Marcus D. Leech]

We're using NEMA-42 sized worm reducers at the observatory, as "prefix" gearing going into the main gearboxes.  This
  has allowed us to use smaller/cheaper/less-power-hungry motors, and still fulfill our motion requirements.

Worm gear arrangements typically have higher backlash than other types of gearing, but for us, that's not a major
  drawback, since they're driving 5000:1 or 8000:1 main gear-trains.

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