On 8/17/2017 6:09 PM, Ignoramus8462 wrote:
I bought a used industrial machine (a huge pipe threader).

It is a super nice machine in all respects and was rebuilt in 2007.

However, the reason why it was sold for nothing is that the cast iron
transmission case in it is cracked due to a past accident.

The picture, with the crack highlighted, is he

http://igor.chudov.com/tmp/trans.jpg
....

Did you try to fix it?