AAA equivalent

Tommegow

Tommegow

Joined
Dec 16, 2004
Messages
678
Is M-C 28 second quench oil an AAA equivalent?
I need to HT some 5160
I have some Parks 50 on hand
but thought it too fast for 5160
 
Probably. IMHO, any medium speed quench oil is probably OK. You don't have
the super tight nose to worry about so what a good oil is giving you is more uniform
quench (less cavitation etc.) and a slower transition from around 900F down to around
450F.
 
He hasn't been on here for a while but Walter Davis was having good luck with the 28 second oil from McMaster Carr. It looked like he was making good choppers and users.

Jake
 
I'm using Houghton Quench K and having great success with 1070/80, W2 and 5160. It has been compared to Parks 50 but with a longer usage life. It is a fast oil and I've had no issues with it.


Rick
 
Tommegow said:
I have some Parks 50 on hand
but thought it too fast for 5160
Click to expand...

I would do an interrupted quench in that case instead of buying new oil for a bit of 5160. That's just what I would do, too fast an oil is not as much a concern as too slow IMO.
 
I would not underestimate the damge that too fast a quench can do. Tom, I think you'll be fine with the McMaster oil.
 
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