I spent next to no money on a rototiller that the tines would not stay engaged on. I thought it was a simple fix, but not so much. Turns out that the gear that engaged the tines had about a quarter of it's teeth cracked off!
![IMG_3923.JPG IMG_3923.JPG](https://www.hobby-machinist.com/data/attachments/45/45839-94cebea9c13edaf9dd67721fe024e097.jpg)
Long story short, the manufacturer no longer make that gear. (it is specific in that it has an integral cog for a chain). So, I ordered a similar one that didn't have the cog
![IMG_3924.JPG IMG_3924.JPG](https://www.hobby-machinist.com/data/attachments/45/45838-c06398272826ad3cacd1e1dc5030da4e.jpg)
. These gears are kinda hard, so I had to anneal them.
![IMG_3941.JPG IMG_3941.JPG](https://www.hobby-machinist.com/data/attachments/45/45840-62c097e5f8426fbf0baef6f1d3bad7a3.jpg)
A few days later, I got back to it. I bored out and chamfered all the un-needed stuff from the new gear
![IMG_3948.JPG IMG_3948.JPG](https://www.hobby-machinist.com/data/attachments/45/45842-68740f64702d2e024ef25e180db88f71.jpg)
![IMG_3950.JPG IMG_3950.JPG](https://www.hobby-machinist.com/data/attachments/45/45843-f4d7a32ce86b4e498d21c832e0510fac.jpg)
. Next, I did the same thing with the old gear
![IMG_3955.JPG IMG_3955.JPG](https://www.hobby-machinist.com/data/attachments/45/45844-475876d0cb687b006cfaf7ab18d3e9da.jpg)
. Next, I set them on a few plates to maintain the reference faces and welded them together
![IMG_3956.JPG IMG_3956.JPG](https://www.hobby-machinist.com/data/attachments/45/45845-6282488ce8b8b9ff8ad9defe72150939.jpg)
![IMG_3959.JPG IMG_3959.JPG](https://www.hobby-machinist.com/data/attachments/45/45846-6c066cd7b285c25e4698dc38d40bc420.jpg)
![IMG_3960.JPG IMG_3960.JPG](https://www.hobby-machinist.com/data/attachments/45/45847-ea7fd127093bdf45da45659ced319a42.jpg)
. I annealed it once again, and in a few days, I will try my hand at hardenening. Hopefully this works, otherwise, I'll have to find another rototiller.
![IMG_3960.JPG IMG_3960.JPG](https://www.hobby-machinist.com/data/attachments/45/45847-ea7fd127093bdf45da45659ced319a42.jpg)