Someone in the Yahoo 4x6 bandsaw group said they know for a fact that
automotive type 90 weight gear lube will attack brass and bronze if
used in machine tools. Has anyone heard of such a thing? I was going to
use Mobil 1 EP Hypoid Gear Oil (SAE 140) in my Clausing 8540.

Thanks, Steve

wrote:
Someone in the Yahoo 4x6 bandsaw group said they know for a fact that
automotive type 90 weight gear lube will attack brass and bronze if
used in machine tools. Has anyone heard of such a thing? I was going to
use Mobil 1 EP Hypoid Gear Oil (SAE 140) in my Clausing 8540.

Thanks, Steve


I used it for years in a hydraulic bandsaw downfeed until I found out it is only
about as viscous as 30 weight motor oil. The downfeed was made entirely of
brass parts, which suffered no ill effects from the exposure. I think the yahoo
guy was fullovit.

GWE

wrote:

Someone in the Yahoo 4x6 bandsaw group said they know for a fact that
automotive type 90 weight gear lube will attack brass and bronze if
used in machine tools. Has anyone heard of such a thing?

Not of gear oil, but cutting oil (BTDT).

Nick
--
Motor Modelle // Engine Models
http://www.motor-manufaktur.de
DIY-DRO // Eigenbau-Digitalanzeige
http://www.yadro.de

"Grant Erwin" wrote in message
...
wrote:
Someone in the Yahoo 4x6 bandsaw group said they know for a fact that
automotive type 90 weight gear lube will attack brass and bronze if
used in machine tools. Has anyone heard of such a thing? I was going to
use Mobil 1 EP Hypoid Gear Oil (SAE 140) in my Clausing 8540.

Thanks, Steve


I used it for years in a hydraulic bandsaw downfeed until I found out it
is only
about as viscous as 30 weight motor oil. The downfeed was made entirely
of
brass parts, which suffered no ill effects from the exposure. I think the
yahoo
guy was fullovit.

GWE

It is likely true that an EP gear oil will attack copper based components in
machinery. EP mineral oils with a rating of GL-5 have this characteristic,
which is a powerful oxidising additive to create a scuff resistant surface
on gear teeth. It is normally used in automotive hypoid differentials and
some manual transmissions designed without vunerable copper alloy parts. The
effect is not dependent on viscosity.

To avoid the problem, a gear oil with a rating of GL-4 or less should be
used. Avoid high EP ratings

The equivalent viscosity to SAE-90 gear oil is SAE-50 in engine oil, ie ISO
VG-220.
--
Regards,

Chas.

(To email me replace 'xxx' with tango papa golf)

Chas wrote in article ...

"Grant Erwin" wrote in message
...
wrote:
Someone in the Yahoo 4x6 bandsaw group said they know for a fact that
automotive type 90 weight gear lube will attack brass and bronze if
used in machine tools. Has anyone heard of such a thing? I was going
to
use Mobil 1 EP Hypoid Gear Oil (SAE 140) in my Clausing 8540.

Thanks, Steve


I used it for years in a hydraulic bandsaw downfeed until I found out
it
is only
about as viscous as 30 weight motor oil. The downfeed was made
entirely
of
brass parts, which suffered no ill effects from the exposure. I think
the
yahoo
guy was fullovit.

GWE

It is likely true that an EP gear oil will attack copper based components
in
machinery. EP mineral oils with a rating of GL-5 have this
characteristic,
which is a powerful oxidising additive to create a scuff resistant
surface
on gear teeth. It is normally used in automotive hypoid differentials and
some manual transmissions designed without vunerable copper alloy parts.
The
effect is not dependent on viscosity.

To avoid the problem, a gear oil with a rating of GL-4 or less should be
used. Avoid high EP ratings

The equivalent viscosity to SAE-90 gear oil is SAE-50 in engine oil, ie
ISO
VG-220.
--
Regards,

Chas.



Synchronizer rings in automotive manual transmissions are made of brass,
and a lot of thrust and shim washers have copper in them.

I guess we'd better take out ALL the EP gear oil that is designed and
recommended for these transmissions and replace it with.........


.................bacon grease????

wrote in message
oups.com...
Someone in the Yahoo 4x6 bandsaw group said they know for a fact that
automotive type 90 weight gear lube will attack brass and bronze if
used in machine tools. Has anyone heard of such a thing? I was going to
use Mobil 1 EP Hypoid Gear Oil (SAE 140) in my Clausing 8540.

Thanks, Steve

I have a 1954 Stokes Oscillating Granulator with bronze bushing bearings on
the rotor. They are continually bathed in 90W high-sulfur oil. The oil
sump also contains a 100% brass oil pump, and numerous brass oil line
fittings.

If anything, it would be the sulfur content that _might_ damage
copper-bearing materials.

Remember, 1954. No damage whatsoever. In fact, except for 1/2" of sludge
in the sump, it looks like a new machine (insideG).

LLoyd

On 29 Mar 2006 21:49:26 -0800, wrote:
Someone in the Yahoo 4x6 bandsaw group said they know for a fact that
automotive type 90 weight gear lube will attack brass and bronze if
used in machine tools. Has anyone heard of such a thing? I was going to
use Mobil 1 EP Hypoid Gear Oil (SAE 140) in my Clausing 8540.

I don't know the Clausing, but unless you have hypoid gears, I can't see
how you'd need (or want) to use a hypoid oil.

In article .com,
says...
Someone in the Yahoo 4x6 bandsaw group said they know for a fact that
automotive type 90 weight gear lube will attack brass and bronze if
used in machine tools. Has anyone heard of such a thing? I was going to
use Mobil 1 EP Hypoid Gear Oil (SAE 140) in my Clausing 8540.


*Some* EP additves will damage *some* copper bases alloy. Most EP gear
oils are no problem - Mobilgear is one that I know is OK. Does your mill
really call for an EP oil? The gears in most machine tools are not
loaded heavily enough to require it.

Mobil has very good tech data on their lubricants online if you want to
check the Mobil 1 to be sure.

Ned Simmons

On 29 Mar 2006 21:49:26 -0800, "
wrote:

Someone in the Yahoo 4x6 bandsaw group said they know for a fact that
automotive type 90 weight gear lube will attack brass and bronze if
used in machine tools. Has anyone heard of such a thing? I was going to
use Mobil 1 EP Hypoid Gear Oil (SAE 140) in my Clausing 8540.

Thanks, Steve

some of the friction modifiers work by bonding with the zinc in the
alloy. when the lubrication film breaks down this oxide is scrubbed
off providing a last ditched lubricating action.

I used castrol gtx motor oil on my lathe until I discovered all the
brass oilers going red. the explanation was surface leaching of the
zinc component in the brass alloy leaving a red copper surface.

for my lathe I now use shell tellus 46 which is a transmission oil.
this oil glues to lathe slideways quite nicely and doesnt leach the
brass. yeah I know the clausing isnt a lathe.

(australian experience)
Stealth Pilot

wrote in message
oups.com...
Someone in the Yahoo 4x6 bandsaw group said they know for a fact that
automotive type 90 weight gear lube will attack brass and bronze if
used in machine tools. Has anyone heard of such a thing? I was going to
use Mobil 1 EP Hypoid Gear Oil (SAE 140) in my Clausing 8540.

Thanks, Steve

When I was researching oil for my Van Norman the presence of "yellow metal"
in the gear box ruled out a few choices, according to Mobil's tech support.

Chas wrote:

It is likely true that an EP gear oil will attack copper based components in
machinery. EP mineral oils with a rating of GL-5 have this characteristic,
which is a powerful oxidising additive to create a scuff resistant surface
on gear teeth. It is normally used in automotive hypoid differentials and
some manual transmissions designed without vunerable copper alloy parts. The
effect is not dependent on viscosity.

To avoid the problem, a gear oil with a rating of GL-4 or less should be
used. Avoid high EP ratings

The equivalent viscosity to SAE-90 gear oil is SAE-50 in engine oil, ie ISO
VG-220.
--
Regards,

Chas.

I notice that my bottle of Walmart Super Tech brand 85W-140 is rated
GL-5 and has the comforting and probably clueless message "protects
against rust, foam, high temperature and corrosion of copper or bronze
bushings."

Mike what oils did they rule out? I just picked up a Rockwell Mill and the
horizontal gear box calls for 140 weight EP gear grease. Local store was a
bit confused.
"ATP*" wrote in message
...

wrote in message
oups.com...
Someone in the Yahoo 4x6 bandsaw group said they know for a fact that
automotive type 90 weight gear lube will attack brass and bronze if
used in machine tools. Has anyone heard of such a thing? I was going to
use Mobil 1 EP Hypoid Gear Oil (SAE 140) in my Clausing 8540.

Thanks, Steve

When I was researching oil for my Van Norman the presence of "yellow
metal" in the gear box ruled out a few choices, according to Mobil's tech
support.

"wayne mak" wrote in message
...
Mike what oils did they rule out? I just picked up a Rockwell Mill and the
horizontal gear box calls for 140 weight EP gear grease. Local store was a
bit confused.

I'm pretty sure they recommended against an EP oil. If you Google EP oil
bronze a few links warn that some EP oils will attack copper containing
alloys. But if your manufacturer recommends it maybe there is no problem for
your machine. Go to the Mobil or Shell website and call tech support, they
can figure out the right oil and put you in touch with a local distributor.





"ATP*" wrote in message
...

wrote in message
oups.com...
Someone in the Yahoo 4x6 bandsaw group said they know for a fact that
automotive type 90 weight gear lube will attack brass and bronze if
used in machine tools. Has anyone heard of such a thing? I was going to
use Mobil 1 EP Hypoid Gear Oil (SAE 140) in my Clausing 8540.

Thanks, Steve

When I was researching oil for my Van Norman the presence of "yellow
metal" in the gear box ruled out a few choices, according to Mobil's tech
support.