This gear replaces the central drive gear in the powered truck of the Lionel Chesapeake & Ohio No. 624 Switcher.

I purchased this locomotive as “for parts or repair” from an auction site, and it needed considerable work. I wanted to see if I could get it running before I spent the money on a proper metal gear.

I printed it in PETG on my Prusa Mini+. A resin printer would be preferable for small gears like this, but I don't own one. So far it has held up fine.