Re: [mill_drill] hardening schedule
- Do it just like i tell you and your hardening process will workIf you want the drill rod just a little harder heat it to a dark cherry read and drop it in oilThe liter the red is the harder the rod will be. Use oil hardening dill rod ok. Forget the annealing. If you want the rod a certain hardness you need to take it to a heat treating companyGP
From: Stan Stocker <skstocker@...>
Sent: Fri, March 8, 2013 11:30:28 AM
Subject: Re: [mill_drill] hardening schedule
Just polish it up and gently heat well back from the business end. Go
slowly, the surface oxide colors will start to run towards the end.
When you hit a light or pale yellow/straw you can quench, or if you have
been really gentle just let it cool.
This assumes O-1 ow W-1 drill rod. If you're using A2 you may not need
to temper if you let it air cool.
A cheap toaster oven can be a handy thing in the shop, makes these sorts
of things simple, along with shrink fitting stuff and heating up a quick
If you do lots of this stuff, a very small shop furnace can be made with
a few firebricks and a propane torch. The firebrick lines chamber if
fairly small allows a more even heat.
On 03/07/2013 11:00 PM, Jerry Durand wrote:
> I need to make a custom lathe tool out of some drill rod. That's no
> problem, the mill will handle that. But it needs to be hardened and
> stress relieved. So, hardening is no problem, but it's a waste to heat
> the oven up to stress relieve it. So, I have it scheduled to line up
> with the next time my wife makes a pie.
> I wonder if that makes the pie a business expense as it's helping to
> make a tool for a customer's job.