I just tore down a early 1960s 3/4 HP 3 phase motor to examine the
insides. It's from a drill press and has grease fittings on it, even
though it's just a 56 frame motor with a 5/8" shaft. There's nothing
special about the motor other than it has a factory paint job that matches
the rest of the machine.

Anyways, the thing was full of grease, yet had shielded (6203zz I think)
Nachi made in Japan bearings installed. They seemed too new to be
original,and why the thing was packed with grease baffles me. Nothing
looks modified in any way.

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?

"Cydrome Leader" wrote in message
...
I just tore down a early 1960s 3/4 HP 3 phase motor to examine the
insides. It's from a drill press and has grease fittings on it, even
though it's just a 56 frame motor with a 5/8" shaft. There's nothing
special about the motor other than it has a factory paint job that
matches
the rest of the machine.

Anyways, the thing was full of grease, yet had shielded (6203zz I
think)
Nachi made in Japan bearings installed. They seemed too new to be
original,and why the thing was packed with grease baffles me.
Nothing
looks modified in any way.

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were
grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?

That's better than no lube ever, like some of the machines I bought
used. The trade school students had broken most of the oil cups off my
lathe.

--jsw

On Wed, 8 Jun 2016 12:33:18 -0400, "Jim Wilkins"
wrote:

"Cydrome Leader" wrote in message
...
I just tore down a early 1960s 3/4 HP 3 phase motor to examine the
insides. It's from a drill press and has grease fittings on it, even
though it's just a 56 frame motor with a 5/8" shaft. There's nothing
special about the motor other than it has a factory paint job that
matches
the rest of the machine.

Anyways, the thing was full of grease, yet had shielded (6203zz I
think)
Nachi made in Japan bearings installed. They seemed too new to be
original,and why the thing was packed with grease baffles me.
Nothing
looks modified in any way.

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were
grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?

That's better than no lube ever, like some of the machines I bought
used. The trade school students had broken most of the oil cups off my
lathe.

And the broken nipples had been left in the holes? That sounds like
the machines I used in 8th grade metalshop. sigh

--
Energy and persistence alter all things.
--Benjamin Franklin

"Larry Jaques" wrote in message
...
On Wed, 8 Jun 2016 12:33:18 -0400, "Jim Wilkins"
wrote:

"Cydrome Leader" wrote in message
...
I just tore down a early 1960s 3/4 HP 3 phase motor to examine the
insides. It's from a drill press and has grease fittings on it,
even
though it's just a 56 frame motor with a 5/8" shaft. There's
nothing
special about the motor other than it has a factory paint job that
matches
the rest of the machine.

Anyways, the thing was full of grease, yet had shielded (6203zz I
think)
Nachi made in Japan bearings installed. They seemed too new to be
original,and why the thing was packed with grease baffles me.
Nothing
looks modified in any way.

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were
grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?

That's better than no lube ever, like some of the machines I bought
used. The trade school students had broken most of the oil cups off
my
lathe.

And the broken nipples had been left in the holes? That sounds like
the machines I used in 8th grade metalshop. sigh

Were you the $#!+#=@[) who beat on the tailstock spindle like an anvil
horn?

It was the only Heavy 10 among a batch of 9" South Bends and I
couldn't pass it up. The dealer swapped the spindle but it's not a
perfect fit. I haven't seen another 10L since for less than twice its
price.

When I bought it there were still industrial suppliers in town. One
had the proper Gits oil cups in stock, and a shiny new Eagle No. 66
oiler:
http://www.ebay.com/itm/Eagle-No-66-...5#ht_174wt_868

--jsw

On Wed, 8 Jun 2016 20:48:56 -0400, "Jim Wilkins"
wrote:

"Larry Jaques" wrote in message
.. .
On Wed, 8 Jun 2016 12:33:18 -0400, "Jim Wilkins"
wrote:

"Cydrome Leader" wrote in message
...
I just tore down a early 1960s 3/4 HP 3 phase motor to examine the
insides. It's from a drill press and has grease fittings on it,
even
though it's just a 56 frame motor with a 5/8" shaft. There's
nothing
special about the motor other than it has a factory paint job that
matches
the rest of the machine.

Anyways, the thing was full of grease, yet had shielded (6203zz I
think)
Nachi made in Japan bearings installed. They seemed too new to be
original,and why the thing was packed with grease baffles me.
Nothing
looks modified in any way.

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were
grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?

That's better than no lube ever, like some of the machines I bought
used. The trade school students had broken most of the oil cups off
my
lathe.

And the broken nipples had been left in the holes? That sounds like
the machines I used in 8th grade metalshop. sigh

Were you the $#!+#=@[) who beat on the tailstock spindle like an anvil
horn?

g Oh, no. I respected the machinery much more than some of my
braindead fellow students.


It was the only Heavy 10 among a batch of 9" South Bends and I
couldn't pass it up. The dealer swapped the spindle but it's not a
perfect fit. I haven't seen another 10L since for less than twice its
price.

When I bought it there were still industrial suppliers in town. One
had the proper Gits oil cups in stock, and a shiny new Eagle No. 66
oiler:
http://www.ebay.com/itm/Eagle-No-66-...5#ht_174wt_868

OMG! Are people really paying those prices? Dolts.

--
Energy and persistence alter all things.
--Benjamin Franklin

I have one - the long or down in a hole is a bit long and would tip over
when most oil was gone. I solved that. I went to the toolbox and got
a 'washer' of lead. Dropped in the tank and it sits nicely. The long
tube might have been added after sales for an operation.

Martin

On 6/10/2016 9:09 AM, Larry Jaques wrote:
On Wed, 8 Jun 2016 20:48:56 -0400, "Jim Wilkins"
wrote:

"Larry Jaques" wrote in message
...
On Wed, 8 Jun 2016 12:33:18 -0400, "Jim Wilkins"
wrote:

"Cydrome Leader" wrote in message
...
I just tore down a early 1960s 3/4 HP 3 phase motor to examine the
insides. It's from a drill press and has grease fittings on it,
even
though it's just a 56 frame motor with a 5/8" shaft. There's
nothing
special about the motor other than it has a factory paint job that
matches
the rest of the machine.

Anyways, the thing was full of grease, yet had shielded (6203zz I
think)
Nachi made in Japan bearings installed. They seemed too new to be
original,and why the thing was packed with grease baffles me.
Nothing
looks modified in any way.

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were
grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?

That's better than no lube ever, like some of the machines I bought
used. The trade school students had broken most of the oil cups off
my
lathe.

And the broken nipples had been left in the holes? That sounds like
the machines I used in 8th grade metalshop. sigh

Were you the $#!+#=@[) who beat on the tailstock spindle like an anvil
horn?

g Oh, no. I respected the machinery much more than some of my
braindead fellow students.


It was the only Heavy 10 among a batch of 9" South Bends and I
couldn't pass it up. The dealer swapped the spindle but it's not a
perfect fit. I haven't seen another 10L since for less than twice its
price.

When I bought it there were still industrial suppliers in town. One
had the proper Gits oil cups in stock, and a shiny new Eagle No. 66
oiler:
http://www.ebay.com/itm/Eagle-No-66-...5#ht_174wt_868

OMG! Are people really paying those prices? Dolts.

--
Energy and persistence alter all things.
--Benjamin Franklin

On Fri, 10 Jun 2016 07:09:26 -0700, Larry Jaques
wrote:

On Wed, 8 Jun 2016 20:48:56 -0400, "Jim Wilkins"
wrote:

"Larry Jaques" wrote in message
. ..
On Wed, 8 Jun 2016 12:33:18 -0400, "Jim Wilkins"
wrote:

"Cydrome Leader" wrote in message
...
I just tore down a early 1960s 3/4 HP 3 phase motor to examine the
insides. It's from a drill press and has grease fittings on it,
even
though it's just a 56 frame motor with a 5/8" shaft. There's
nothing
special about the motor other than it has a factory paint job that
matches
the rest of the machine.

Anyways, the thing was full of grease, yet had shielded (6203zz I
think)
Nachi made in Japan bearings installed. They seemed too new to be
original,and why the thing was packed with grease baffles me.
Nothing
looks modified in any way.

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were
grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?

That's better than no lube ever, like some of the machines I bought
used. The trade school students had broken most of the oil cups off
my
lathe.

And the broken nipples had been left in the holes? That sounds like
the machines I used in 8th grade metalshop. sigh

Were you the $#!+#=@[) who beat on the tailstock spindle like an anvil
horn?

g Oh, no. I respected the machinery much more than some of my
braindead fellow students.


It was the only Heavy 10 among a batch of 9" South Bends and I
couldn't pass it up. The dealer swapped the spindle but it's not a
perfect fit. I haven't seen another 10L since for less than twice its
price.

When I bought it there were still industrial suppliers in town. One
had the proper Gits oil cups in stock, and a shiny new Eagle No. 66
oiler:
http://www.ebay.com/itm/Eagle-No-66-...5#ht_174wt_868

OMG! Are people really paying those prices? Dolts.

CROM!! Ive got at least 6 of those out in the shop....!!! Im rich!!


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On 06/08/2016 11:13 AM, Cydrome Leader wrote:
....

... Why the thing was pumped full of grease later is a mystery.

If you got a piece of gear with grease zerks, wouldn't _you_ grease it
on the presumption they were there for a reason?

Anybody seen anything like this before?

Sure, happens not frequently but on occasion. Are the bearings really
sealed or just shielded in the latter case there is still a reason.

--

dpb wrote:
On 06/08/2016 11:13 AM, Cydrome Leader wrote:
...

... Why the thing was pumped full of grease later is a mystery.

If you got a piece of gear with grease zerks, wouldn't _you_ grease it
on the presumption they were there for a reason?

Anybody seen anything like this before?

Sure, happens not frequently but on occasion. Are the bearings really
sealed or just shielded in the latter case there is still a reason.

They're double shielded, the sealed for life throw away type. Only the
larger bearing for the variable speed drive (a sheave that slides up
and down a shaft) has a removable seal kit.

Was there a transition in the industrial motor world where they still
drilled and tapped grease ports in motor housings but just installed ball
bearings instead?

Cydrome Leader on Wed, 8 Jun 2016 17:00:46
+0000 (UTC) typed in rec.crafts.metalworking the following:
dpb wrote:
On 06/08/2016 11:13 AM, Cydrome Leader wrote:
...

... Why the thing was pumped full of grease later is a mystery.

If you got a piece of gear with grease zerks, wouldn't _you_ grease it
on the presumption they were there for a reason?

Anybody seen anything like this before?

Sure, happens not frequently but on occasion. Are the bearings really
sealed or just shielded in the latter case there is still a reason.

They're double shielded, the sealed for life throw away type. Only the
larger bearing for the variable speed drive (a sheave that slides up
and down a shaft) has a removable seal kit.

Was there a transition in the industrial motor world where they still
drilled and tapped grease ports in motor housings but just installed ball
bearings instead?

Or, just as likely, the original bearings were replaced with
sealed ones. And with the zerks in place, someone thoughtfully
greased the bearings.
Whether they needed it or not.


tschus
pyotr

--
pyotr filipivich
"With Age comes Wisdom. Although more often, Age travels alone."

dpb on Wed, 08 Jun 2016 11:53:31 -0500 typed in
rec.crafts.metalworking the following:
On 06/08/2016 11:13 AM, Cydrome Leader wrote:
...

... Why the thing was pumped full of grease later is a mystery.

If you got a piece of gear with grease zerks, wouldn't _you_ grease it
on the presumption they were there for a reason?

Buda-bing!


And a gold plated no prize for our contestant!
--
pyotr filipivich
"With Age comes Wisdom. Although more often, Age travels alone."

On Wed, 08 Jun 2016 11:40:24 -0700, pyotr filipivich
wrote:

dpb on Wed, 08 Jun 2016 11:53:31 -0500 typed in
rec.crafts.metalworking the following:
On 06/08/2016 11:13 AM, Cydrome Leader wrote:
...

... Why the thing was pumped full of grease later is a mystery.

If you got a piece of gear with grease zerks, wouldn't _you_ grease it
on the presumption they were there for a reason?

Buda-bing!


And a gold plated no prize for our contestant!
--
pyotr filipivich
"With Age comes Wisdom. Although more often, Age travels alone."

^5 !!


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On 6/8/2016 12:53 PM, dpb wrote:


If you got a piece of gear with grease zerks, wouldn't _you_ grease it
on the presumption they were there for a reason?


Not if it is an old Bridgeport mill, you oil those grease fittings.....


MikeB

On 6/8/2016 12:13 PM, Cydrome Leader wrote:

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?



I've done it myself many times. I should have removed and plugged the
zerks but was too lazy.

Tom Gardner wrote:
On 6/8/2016 12:13 PM, Cydrome Leader wrote:

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?



I've done it myself many times. I should have removed and plugged the
zerks but was too lazy.

So what used to be inside this motor? The same bearings, but with no
shield, and tons of grease? What the standard pratice for fractional HP
motors 50+ years ago?

On Wed, 8 Jun 2016 21:19:35 +0000 (UTC), Cydrome Leader
wrote:

Tom Gardner wrote:
On 6/8/2016 12:13 PM, Cydrome Leader wrote:

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?



I've done it myself many times. I should have removed and plugged the
zerks but was too lazy.

So what used to be inside this motor? The same bearings, but with no
shield, and tons of grease? What the standard pratice for fractional HP
motors 50+ years ago?

You nailed it in the first part of your question.

No shields


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On Wed, 8 Jun 2016 21:19:35 +0000 (UTC), Cydrome Leader
wrote:

Tom Gardner wrote:
On 6/8/2016 12:13 PM, Cydrome Leader wrote:

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?



I've done it myself many times. I should have removed and plugged the
zerks but was too lazy.

So what used to be inside this motor? The same bearings, but with no
shield, and tons of grease? What the standard pratice for fractional HP
motors 50+ years ago?

No such thing as "standard practice" Cheap motors used plain bearings.
Many better motors used ball bearings. 50 years ago was only 1966
-ball bearings were pretty common - but usually not fully sealed or
double sheilded. Many would have been "oil lubricated"uising thick
oil, rather than grease - with felt or synthetic rubber seals. I
remember some old repulsion start induction motors from the late
fifties with oiled ball bearings, as well as some with oiled plain
bearings - the big ball bearing motor was on the bale elevator. I
think the motor on the pump-jack was also ball bearing, and the one on
the cement mixer was plain bearing.- oiled, not greased

Some were even ball bearing on the drive end and plain bearing on the
bell end

wrote:
On Wed, 8 Jun 2016 21:19:35 +0000 (UTC), Cydrome Leader
wrote:

Tom Gardner wrote:
On 6/8/2016 12:13 PM, Cydrome Leader wrote:

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?



I've done it myself many times. I should have removed and plugged the
zerks but was too lazy.

So what used to be inside this motor? The same bearings, but with no
shield, and tons of grease? What the standard pratice for fractional HP
motors 50+ years ago?

No such thing as "standard practice" Cheap motors used plain bearings.
Many better motors used ball bearings. 50 years ago was only 1966
-ball bearings were pretty common - but usually not fully sealed or
double sheilded. Many would have been "oil lubricated"uising thick

Any reason for that, or why the shielded/sealed stuff took over? Was there
some incredible development in stamping out shields or lubricants?

oil, rather than grease - with felt or synthetic rubber seals. I
remember some old repulsion start induction motors from the late
fifties with oiled ball bearings, as well as some with oiled plain
bearings - the big ball bearing motor was on the bale elevator. I
think the motor on the pump-jack was also ball bearing, and the one on
the cement mixer was plain bearing.- oiled, not greased

Some were even ball bearing on the drive end and plain bearing on the
bell end

On Thu, 9 Jun 2016 17:01:36 +0000 (UTC), Cydrome Leader
wrote:

wrote:
On Wed, 8 Jun 2016 21:19:35 +0000 (UTC), Cydrome Leader
wrote:

Tom Gardner wrote:
On 6/8/2016 12:13 PM, Cydrome Leader wrote:

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?



I've done it myself many times. I should have removed and plugged the
zerks but was too lazy.

So what used to be inside this motor? The same bearings, but with no
shield, and tons of grease? What the standard pratice for fractional HP
motors 50+ years ago?

No such thing as "standard practice" Cheap motors used plain bearings.
Many better motors used ball bearings. 50 years ago was only 1966
-ball bearings were pretty common - but usually not fully sealed or
double sheilded. Many would have been "oil lubricated"uising thick

Any reason for that, or why the shielded/sealed stuff took over? Was there
some incredible development in stamping out shields or lubricants?

There have been big improvements in ball and race materials; modest
improvements in their accuracy; and huge improvements in lubricants.




oil, rather than grease - with felt or synthetic rubber seals. I
remember some old repulsion start induction motors from the late
fifties with oiled ball bearings, as well as some with oiled plain
bearings - the big ball bearing motor was on the bale elevator. I
think the motor on the pump-jack was also ball bearing, and the one on
the cement mixer was plain bearing.- oiled, not greased

Some were even ball bearing on the drive end and plain bearing on the
bell end

On Thu, 9 Jun 2016 17:01:36 +0000 (UTC), Cydrome Leader
wrote:


No such thing as "standard practice" Cheap motors used plain bearings.
Many better motors used ball bearings. 50 years ago was only 1966
-ball bearings were pretty common - but usually not fully sealed or
double sheilded. Many would have been "oil lubricated"uising thick

Any reason for that, or why the shielded/sealed stuff took over? Was there
some incredible development in stamping out shields or lubricants?
'Better bearing construction, better shielding techniques, better
design and implementation

I've read that what used to be a grade 7 bearing in 1960, is now a
grade 3 bearing and what is a grade 7 today..was considered to be a
grade 9 back then

Gunner, on the road to LA

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On Thu, 9 Jun 2016 17:01:36 +0000 (UTC), Cydrome Leader
wrote:

wrote:
On Wed, 8 Jun 2016 21:19:35 +0000 (UTC), Cydrome Leader
wrote:

Tom Gardner wrote:
On 6/8/2016 12:13 PM, Cydrome Leader wrote:

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?



I've done it myself many times. I should have removed and plugged the
zerks but was too lazy.

So what used to be inside this motor? The same bearings, but with no
shield, and tons of grease? What the standard pratice for fractional HP
motors 50+ years ago?

No such thing as "standard practice" Cheap motors used plain bearings.
Many better motors used ball bearings. 50 years ago was only 1966
-ball bearings were pretty common - but usually not fully sealed or
double sheilded. Many would have been "oil lubricated"uising thick

Any reason for that, or why the shielded/sealed stuff took over? Was there
some incredible development in stamping out shields or lubricants?

oil, rather than grease - with felt or synthetic rubber seals. I
remember some old repulsion start induction motors from the late
fifties with oiled ball bearings, as well as some with oiled plain
bearings - the big ball bearing motor was on the bale elevator. I
think the motor on the pump-jack was also ball bearing, and the one on
the cement mixer was plain bearing.- oiled, not greased

Some were even ball bearing on the drive end and plain bearing on the
bell end
Better technology - both in the stamping/seal technology, but also
lubrication, made "lifetime sealed" bearings possible - and bropught
the price WAY down. And the market ate it up - no more greasing!!!!

On Wed, 8 Jun 2016 16:13:42 +0000 (UTC), Cydrome Leader
wrote:

I just tore down a early 1960s 3/4 HP 3 phase motor to examine the
insides. It's from a drill press and has grease fittings on it, even
though it's just a 56 frame motor with a 5/8" shaft. There's nothing
special about the motor other than it has a factory paint job that matches
the rest of the machine.

Anyways, the thing was full of grease, yet had shielded (6203zz I think)
Nachi made in Japan bearings installed. They seemed too new to be
original,and why the thing was packed with grease baffles me. Nothing
looks modified in any way.

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?


I've seen double sealed bearings installed in place of single sealed -
the grease fitting is on the "unsealed" side. Does no good with double
sealed bearings and can pop the outer seal off single sealed bearings
in some cases.

**** like this happens all the time

welcome to corporate stupidity in action

They did not grease the motor when it had plain or unshielded bearings

Then they replaced them with shielded bearings and having been burned
by bearing failure, introduced a greasing schedule

It is easy to make fun of such people, but we make dumb mistakes of
our own

On 2016-06-08, Cydrome Leader wrote:
I just tore down a early 1960s 3/4 HP 3 phase motor to examine the
insides. It's from a drill press and has grease fittings on it, even
though it's just a 56 frame motor with a 5/8" shaft. There's nothing
special about the motor other than it has a factory paint job that matches
the rest of the machine.

Anyways, the thing was full of grease, yet had shielded (6203zz I think)
Nachi made in Japan bearings installed. They seemed too new to be
original,and why the thing was packed with grease baffles me. Nothing
looks modified in any way.

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?

On Wednesday, June 8, 2016 at 6:06:35 PM UTC-4, Ignoramus27719 wrote:
**** like this happens all the time

welcome to corporate stupidity in action

They did not grease the motor when it had plain or unshielded bearings

Then they replaced them with shielded bearings and having been burned
by bearing failure, introduced a greasing schedule

It is easy to make fun of such people, but we make dumb mistakes of
our own


It is not always corporate stupidity. Where I use to work there was a motor that drove a 800 cycle generator. The 800 cycles was used during missile testing and was needed about two or three hours a week. The motor had greaseable bearings and as I remember the manufacturer recommended a couple of shots of grease every five years when the motor was used 16 hours a day. The PM schedule could be scheduled for daily, weekly, monthly , every three months , twice a year , and once a year. So what would you do? Grease the motor once a year? Or not ever grease the motor?

Dan

wrote in message
...
On Wednesday, June 8, 2016 at 6:06:35 PM UTC-4, Ignoramus27719 wrote:
**** like this happens all the time

welcome to corporate stupidity in action

They did not grease the motor when it had plain or unshielded
bearings

Then they replaced them with shielded bearings and having been
burned
by bearing failure, introduced a greasing schedule

It is easy to make fun of such people, but we make dumb mistakes of
our own


It is not always corporate stupidity. Where I use to work there was a
motor that drove a 800 cycle generator. The 800 cycles was used
during missile testing and was needed about two or three hours a
week. The motor had greaseable bearings and as I remember the
manufacturer recommended a couple of shots of grease every five years
when the motor was used 16 hours a day. The PM schedule could be
scheduled for daily, weekly, monthly , every three months , twice a
year , and once a year. So what would you do? Grease the motor once
a year? Or not ever grease the motor?

Dan

==========

The machinery in the model shop I ran was Air Force property. They
required it to be lubed weekly by a checklist no matter how little use
it got or what the maker recommended.
--jsw

On Wed, 8 Jun 2016 16:13:42 +0000 (UTC), Cydrome Leader
wrote:

I just tore down a early 1960s 3/4 HP 3 phase motor to examine the
insides. It's from a drill press and has grease fittings on it, even
though it's just a 56 frame motor with a 5/8" shaft. There's nothing
special about the motor other than it has a factory paint job that matches
the rest of the machine.

Anyways, the thing was full of grease, yet had shielded (6203zz I think)
Nachi made in Japan bearings installed. They seemed too new to be
original,and why the thing was packed with grease baffles me. Nothing
looks modified in any way.

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?


I see this all the time. Someone replaced the bearings not long ago
and used bearings that were handy. They simply didnt clean out the
gook when they did it..probably in a hurry to get it back into
production.
Shielded bearings, pre lubed are fine for this application and will
work as well as the original unshielded bearings that required you to
lube them. Nachi bearings are in the top 5 bearing manufactures..so
you are good to go.

Gunner

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Cydrome Leader fired this volley in news:nj9g7l
:

The only thing that would make even a lick of sense is there were
unshielded bearings in there originally and that's why there were grease
ports. Why the thing was pumped full of grease later is a mystery.

Anybody seen anything like this before?

I think what makes more sense is that someone replaced the bearings with
sealed. Later, someone ELSE, not realizing there were sealed bearings in
there, and seeing the grease nipples, reasonably assumed it was intended to
be greased, and did so. shrug

LLoyd

Cydrome Leader wrote:

I just tore down a early 1960s 3/4 HP 3 phase motor to examine the
insides. It's from a drill press and has grease fittings on it, even
though it's just a 56 frame motor with a 5/8" shaft. There's nothing
special about the motor other than it has a factory paint job that matches
the rest of the machine.

Anyways, the thing was full of grease, yet had shielded (6203zz I think)

If somebody over greased it, the grease would push through the shieleds and
then spray off the shaft all over the inside of the motor. I think I've
seen this before. The grease is not good for the windings.

Jon

On Saturday, June 11, 2016 at 9:17:47 PM UTC-4, Jon Elson wrote:

If somebody over greased it, the grease would push through the shieleds and
then spray off the shaft all over the inside of the motor. I think I've
seen this before. The grease is not good for the windings.

Jon

I have seen a motor that had a pipe plug that one removed first and then put grease into a zerk fitting until grease came out the pipe plug hole. So with a unshielded bearing oven greasing would not get grease on the windings.

It was a long time ago, and I am not sure what would happen if the bearings had been replaced with shielded bearings.

Dan