[TheForge] new question, quenching oil

[Lon Humphrey]

i use hydro oil mixed with desil fuel to thin it out a bit....im working 
52100 with good results.....over 200 cuts on sisal rope b4 it goes dull



----- Original Message ----- 
From: "David E. Smucker" <davesmucker at hotmail.com>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Monday, November 12, 2007 1:08 PM
Subject: Re: [TheForge] new question, quenching oil


> The primary oil I use for oil quenching is used hydraulic oil.  Hydraulic 
> oil today is generally straight mineral oil with R & O additives.  (R & O, 
> is Rust and Oxidation).  It has worked very well for me.  I thin it a bit 
> by adding diesel oil but other wise use it straight from a hydraulic oil 
> change on the tractor.  It DOES NOT smell near as good as using one of the 
> cooking oils but I avoid the best I can breathing the fumes from 
> quenching.  It is much cleaner than used motor oil with much lower 
> additive package.  I use a 15 gallon beer keg for my quench container so I 
> have about 14 gallons in the keg.  The top was cut out and I have a 
> fabricated lid to drop in place in case of fire.
>
> Most likely the best quench oil are the commercial ones -- cost is around 
> $ 80 for 5 gallons.  Some of the knife maker supply houses sell these 
> oils.  I know of no industrial heat treaters that use cooling oil for 
> quenching.
>
> One note of special care with quench oil -- you can collect water in the 
> bottom of your container and never know it -- from say storing your 
> contain outside of the shop and collecting rain.  If you drop by mistake 
> hot metal into such a container you can cause the water in the bottom to 
> boil and blow oil out of the contain in one big burp.  Makes for a mess, 
> and serious fire risk.
>
> Dave
> ----- Original Message ----- 
> From: "lee robbins" <naturadoc1 at yahoo.com>
> To: <theforge at mailman.qth.net>
> Sent: Monday, November 12, 2007 10:37 AM
> Subject: [TheForge] new question, quenching oil
>
>
>> has anyone had any experienced quenching oil hardening
>> steel in hydraulic oil. i emptied my backhoe after
>> draining the system to fix a pipe and added fresh oil
>> and the old stuff seems perfect. I wonder if anyone
>> has had experience with this and if there is any
>> reason to avoid it.
>>
>> Lee Robbins
>> Flying tortoise forge studio
>>
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