Electronics > Mechanical & Automation Engineering

Daydreaming about an Electronic Leadscrew

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Benta:

--- Quote from: langwadt on May 06, 2023, 10:13:59 pm ---sorta related, https://youtu.be/1paTlW-W9Zo

--- End quote ---
Not really, unless you have a very big wallet.

Benta:

--- Quote from: jpanhalt on May 06, 2023, 09:48:55 pm ---It's also available on eBay in a 3D printed plastic version.  I got a steel version from China (considerably cheaper than the 3D print).  They are cast, so center may be a little off.  Years ago, I asked how to center a gear in a 4-jaw for on-center boring.  The answer I got was to use copper strips.  I use 0.025".

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Forget 3D, it has no strength. Like I wrote, the original Prazi gears are reinforced Nylon/Delrin.
Cast iron is a good choice, it meshes well with the Delrin.
Concerning copper: yeah, but aluminium will work just as well and is easier to find.

Can you post a link to the gear supplier?

langwadt:

--- Quote from: Benta on May 06, 2023, 10:22:33 pm ---
--- Quote from: langwadt on May 06, 2023, 10:13:59 pm ---sorta related, https://youtu.be/1paTlW-W9Zo

--- End quote ---
Not really, unless you have a very big wallet.

--- End quote ---

sure if you do it in steel, he started with 3D printed

jpanhalt:
@ Benta, Here's the original listing: https://www.ebay.com/itm/174747512509
There are at least 2  that offer the same pricing.

Only the larger gears are hardened. The sizes I ordered are soft castings.  Should be here in about a week.

Benta:
Wow, dirt cheap to say the least.
You'll probably need to bore them out and mount them on a bushing. Personally, I'd just braze them together after that and use the set as a permanent metric/inch transposer. Easier than making keyways etc.
I look forward to seeing your results.

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