Cutting Fluid for Threading and chambering!

[Clark]

I have done about 50 barrels over 20 years with sulfurized cutting oil.
This month I did 4 barrels with Castrol Moly Dee.
The tool force was less.
The feeds and speeds were higher without chattering. This is much nicer for parting on the lathe.

 

[rockrat]

What do you use to pump fluid thru the muzzle of the barrel and what fitting on the barrel?

 

[Dusty Stevens]

What do you use to pump fluid thru the muzzle of the barrel and what fitting on the barrel?

Deublin rotary union

 

[GenePoole]

What he said.

 

[DaveTooley]

^^^
Cool, thanks for the info.
I see it online for under $120 for a 5 gal- that's way less than Ridgid.

Admittedly, much of the chemistry of all the neat cutting oils is way beyond my pay grade- and confusing.
Chorinated additives, sulfur content, etc. Some have both, some one or the other- or none.

Is the viscosity similar to darker cutting oils?
Do you use it strictly for chambering, or all ops where lubrication is beneficial?

It's thinner than dark thread cutting oil. I run it with an 1/8th HP pump with no problems.
I had the rep come by the shop and gave him the particulars of what I do and his engineers came up with this. I chamber on a Haas. I turn dry and do everything else wet. That's threading at up to 600 RPM's. Most of the time it's 400-500 for barrel tenons.

 

[tobnpr]

^^^
Last one, I promise
HSS or carbide reamers? Confirming you're using the oil in the same application/feeds/speeds as the rest of peasants chambering on a manual machine.

 

[Dusty Stevens]

^^^
Last one, I promise
HSS or carbide reamers? Confirming you're using the oil in the same application/feeds/speeds as the rest of peasants chambering on a manual machine.

No carbide. Not needed

 

[ljmontano]

Oatey dark thread cutting oil is good stuff

• Excellent lubricant for cutting sharp threadsllContains activated sulfur-lard and extreme pressure-antiwear additives
• Free of halogens, PCBs and heavy metals
• Cointains no nitrosamine-forming compounds or chlorine additivesllAlso used for hacksawing and light drilling
• Better heat dissipation
• Long lasting formula with less residue backup
• USDA Listed
• For warranty product details, refer to the Oatey limited Warranty document

 

[AckleymanII]

I would wager that 90% of all the home gunsmiths are using Some form of Dark Sulphur cutting oil to chamber with.

 

[tobnpr]

Tap magic X-tra thick for chambering!

I had to deepen a chamber by .025 today, for such a small amount I wasn't going to take the time to set up, use the flush system, etc. so I decided to deepen it by hand like a short-chambered barrel.

I was going to slather it with Viper's when I remembered this post, so I tried it.
No problem with the cutting, cut easily and left a mirror finish- but man, that s*** would NOT come off the reamer.
Before installing a flush system I would always clean between "pecks" by spraying liberally with brake cleaner, blowing it off, before dipping the reamer back in oil for another go.

The X-tra thick just hung on the reamer. Brake cleaner didn't cut it well, so the reamer still had chips in between the flutes even after blowing off with compressed air. I had to wipe it down with a rag and run shop swabs down into the flutes to clean it out completely when I was done.

Curious, how do you "cut" this stuff when you withdraw the reamer and clean it?

 

[AckleymanII]

Air hose, swish in mineral spirits....easy.

 

[Dave@MAM]

I been hearing about Habcool 318. Anyone ever use this stuff?

I use Habcool gun drill oil in the flush system for chambering, and 318 for threading and it has produced very nice finishes. Kinda pricey but.........

 

[hogpatrol]

Haven't done it lately but we used to thin the sulfur based dark oils with kerosene, Rigid or other brands. Last cut on the threads is a spring cut with a fair amount of oil.

 

[efoleyjr]

Take a quart of the Rigif Dark and pour a little can of Tap Magic into it.

you can just threaten the barrel with the tool and shavings will fly off.

What kind of Tap Magic and what volume?