Annealed 4140 for project = DIY hardening?

I was able to exchange the Milwaukee bit.
Let's try this again.
 
It worked fine. I think the bit was just poorly made.
 

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Idecided to add the 10/32 allen set screw with a brass tip on the end of the t slot chuck stops I’ve been working on.
I ended up heat treating my prototype this afternoon.753EE0DE-A9D2-428F-8E35-1F54F6405413.jpeg04912771-0AED-4A98-80B4-3BD7D3A9AEAF.jpeg6D4E6A79-E8B3-4A91-BE18-7C0232D8C045.jpeg02254093-DE7D-4B3C-82BB-B29A088DD52E.jpeg
It went well, it is pretty tough now.
The next three will be done in series at the same time.
 
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