I need to duplicate this keyway on another shaft. The shaft mild steel, diameter is 0.625in nominal. The key dims are 0.118in wide x 0.5in long x 0.080 deep.
Looks like the original was cut with an endmill, but all I can envision is a lot of broken endmills and ruined work if I were to try this with such a small diameter tool.
Can someone please advise the proper tool and procedure?
![Keyway.jpg Keyway.jpg](https://www.hobby-machinist.com/data/attachments/434/434184-0fb0dbf0c964a98b25455a69710aff2d.jpg)
Looks like the original was cut with an endmill, but all I can envision is a lot of broken endmills and ruined work if I were to try this with such a small diameter tool.
Can someone please advise the proper tool and procedure?
![Keyway.jpg Keyway.jpg](https://www.hobby-machinist.com/data/attachments/434/434184-0fb0dbf0c964a98b25455a69710aff2d.jpg)