Banebots 42mm gearbox: Recommendations for use

[eugenebrooks]

Originally Posted by ZZII 527

With all the work being done to solve the softer 56mm carrier plate issue, I haven't been really thinking about the 42mm plates. We still want to use them at 256:1 to drive our arm. Is anyone else still pursuing a 256:1-based arm?

I got a replacement carrier for the one I fractured, but it seems to be a slightly different version, so I am going to make new plates out of the left-over A2 tool steel I have from testing 56mm plates. At least I have a tempering process that I know works for getting this to HRC40. And this time I will take the pins out first. (To anyone just tuning in, I was able to harden the original 42mm carrier plate, which is, unlike the 56mm plate, tool steel, but the pins fractured.) I am going to make six (see attached), temper a few for testing, and save the rest as spares. If anyone wants the .dxf or an OMAX layout file, let me know.

Tool steel is too brittle for this application.
You should be using 4130, 4340, or 4140.

Eugene