Conservative. Idaho. Software engineer. Historian. Trying to prevent Idiocracy from becoming a documentary.
Email complaints/requests about copyright infringement to clayton @ claytoncramer.com. Reminder: the last copyright troll that bothered me went bankrupt.
Pages
▼
Sunday, February 2, 2025
Spur Gears: Cheap Perhaps Scrap Source?
I am looking at the slow motion declination axis control. This could be a worm gear or two spur gears. The exact reduction ratio is not terribly important. A slow motion control is used by an astronomer to make small changes, fractions of a degree at a time. A worm gear is nice but worm gears with a .5" bore diameter are shockingly expensive. A couple spur gears could do the job. There are devices out there likely scrap that have slow gears galore in them. Buy what sort of devices?
It looks like you can get a 1:120 worm gear set with a 12mm bore on the gear (https://www.amazon.com/Brass-Worm-Teeth-0-4MM-Diameter/dp/B0B6VH2X71).
ReplyDelete12mm is a smidge over 15/32". It shouldn't be too hard to use a reamer (https://drillsandcutters.com/1-2-hss-straight-flute-hand-reamer/) to bring the hole out to 1/2". You are only enlarging the hole by about 0.028".