Originally Posted by
Bonniemac
I recently picked up a 1005 mechanical Bernina, but haven't had a chance to put it through it's paces. If someone is interested, I'll check inside about the gears.
I also have a classic 830, but thought the only nylon gear was the camstack. It's out of reach at the moment, so now my curiosity will motivate me to clear off the sewing table so I can get to it.
Sue
I believe the 830 and all other vintage machines from the 600 series onward have 4 nylon gears. Typically, it's the camstack gear that can go bad, but also the top vertical shaft gear can go. There's also a nylon gear behind the hook assembly and one at the base of the machine. So, that's 4.