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Default Trunion help

does anyone have any suggestions on how to get this shaft out?
My saw (Rockwell contractor saw) has been very hard to raise the blade,
so breaking it down the reason lies here. It won't move.
I've used some penetrating oil to try to loosen it up, no help so far
take it to a machine shop and have it pressed out?
suggestions?
TIA






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Default Trunion help

ChairMan wrote:
does anyone have any suggestions on how to get this shaft out?
My saw (Rockwell contractor saw) has been very hard to raise the
blade, so breaking it down the reason lies here. It won't move.
I've used some penetrating oil to try to loosen it up, no help so far
take it to a machine shop and have it pressed out?
suggestions?
TIA


How much force have you put to it?

--

-Mike-



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Default Trunion help

ChairMan wrote:
does anyone have any suggestions on how to get this shaft out?
My saw (Rockwell contractor saw) has been very hard to raise the
blade, so breaking it down the reason lies here. It won't move.
I've used some penetrating oil to try to loosen it up, no help so
far
take it to a machine shop and have it pressed out?
suggestions?
TIA


How much force have you put to it?

--

-Mike-


smacked it with a hammer(16oz) at least a dozen times with a slightly
smaller diameter steel rod, moved about a 1/16th of an inch


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Default Trunion help

ChairMan wrote:
does anyone have any suggestions on how to get this shaft out?
My saw (Rockwell contractor saw) has been very hard to raise the blade,
so breaking it down the reason lies here. It won't move.
I've used some penetrating oil to try to loosen it up, no help so far
take it to a machine shop and have it pressed out?
suggestions?
TIA


Is that a retaining pin in the center, or just a hole where one was?

--
Gerald Ross

I hate it when that happens.






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Default Trunion help

Gerald Ross wrote:
ChairMan wrote:
does anyone have any suggestions on how to get this shaft out?
My saw (Rockwell contractor saw) has been very hard to raise the blade,
so breaking it down the reason lies here. It won't move.
I've used some penetrating oil to try to loosen it up, no help so far
take it to a machine shop and have it pressed out?
suggestions?
TIA


Is that a retaining pin in the center, or just a hole where one was?

Disclaimer: I am not a machinist and have never taken a saw apart..
It that is
a retaining pin it is probably a tapered pin with a smaller hole on
the opposite
side where you can knock it out with a drift punch. If all this is
true and you don't have a flat
ended punch you can use something like a nail after grinding off the
sharp end to make
it flat ended.

--
Gerald Ross

I hate it when that happens.








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Default Trunion help

ChairMan wrote:
ChairMan wrote:
does anyone have any suggestions on how to get this shaft out?
My saw (Rockwell contractor saw) has been very hard to raise the
blade, so breaking it down the reason lies here. It won't move.
I've used some penetrating oil to try to loosen it up, no help so
far
take it to a machine shop and have it pressed out?
suggestions?
TIA


How much force have you put to it?

--

-Mike-


smacked it with a hammer(16oz) at least a dozen times with a slightly
smaller diameter steel rod, moved about a 1/16th of an inch


It looks like you might have already tried to get some penetrating oil in
there - seems like the pics show some signs of that. I would try throwing
some heat at it if you have that capability. That's a lot of cast iron to
absorb heat, so a propane or a map torch might not be enough heat. Then
again... I have surprised myself in the past at the results of using map gas
when I was certain that I'd need to hit the object with my acetelene torch.
It's worth the attempt. Try to heat the pin. Ultimately, you would want to
get the pin red hot if you could.

--

-Mike-



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Default Trunion help

I would use heat as suggested.
It will burn the paint off though....
I had recently repaired a large drive through gate.
The pins in the hinges were the nemesis of the problem since they were
frozen solid and the owner forced the gate open.
That was the problem.
I tried penetrating oil, W-D 40, etc. etc.
I was ready to give when I decided to use a propane torch.....like a small
plumbers torch.
I heated the area, well, let it cool, oiled it, (yes some burning and smoke)
and then worked it.
Doing this several times........
The heat expanded the fitting allowing the debris to come out and the hinge
worked perfectly.
These were very tight fitting pins in a large diameter cylinder.

"ChairMan" wrote in message
m...

does anyone have any suggestions on how to get this shaft out?
My saw (Rockwell contractor saw) has been very hard to raise the blade,
so breaking it down the reason lies here. It won't move.
I've used some penetrating oil to try to loosen it up, no help so far
take it to a machine shop and have it pressed out?
suggestions?
TIA


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Default Trunion help


"Gerald Ross" wrote in message
...
Gerald Ross wrote:
ChairMan wrote:
does anyone have any suggestions on how to get this shaft out?
My saw (Rockwell contractor saw) has been very hard to raise the blade,
so breaking it down the reason lies here. It won't move.
I've used some penetrating oil to try to loosen it up, no help so far
take it to a machine shop and have it pressed out?
suggestions?
TIA


Is that a retaining pin in the center, or just a hole where one was?

Disclaimer: I am not a machinist and have never taken a saw apart.. It
that is
a retaining pin it is probably a tapered pin with a smaller hole on the
opposite
side where you can knock it out with a drift punch. If all this is true
and you don't have a flat
ended punch you can use something like a nail after grinding off the sharp
end to make
it flat ended.


If it's similar to this saw
http://d3cmirsdb60x3h.cloudfront.net...34-441.big.pdf it's
a set screw... If the screw was removed I'd check to make sure there isn't a
second set screw below it. I've got double set screws on my Delta DJ-20
where the "top" screw serves as a locking screw for the first... I suppose
that at different times they may have used a pin and if so it's likely a
roll pin which has a hollow center.

If it's not that I'd go with heat, a press, electrolysis or muriatic acid in
that order. I'd be loathe to put too much pressure on it with a big press
for fear of breaking the castings... use good support and moderation.

John




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Default Trunion help

On Thu, 23 Feb 2012 08:14:04 -0500, "Mike Marlow"
wrote:

. Try to heat the pin. Ultimately, you would want to
get the pin red hot if you could.


Heat the pin? Won't that just make it tighter?

(Sorry if I'm being ignorant).

-Zz
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Default Trunion help/update


"ChairMan" wrote in message
m...
does anyone have any suggestions on how to get this shaft out?
My saw (Rockwell contractor saw) has been very hard to raise the blade,
so breaking it down the reason lies here. It won't move.
I've used some penetrating oil to try to loosen it up, no help so far
take it to a machine shop and have it pressed out?
suggestions?
TIA



Thanks for all the replies and suggestions.
I never got the shaft out, but I clamped it to one of my horses and started
lubing it with penetrating oil and working it up and down with a crowbar.
Finally got it loosened up and then flooded it with WD-40 while I worked it
up and down until it ran clear from rust. Now if I pull it to the up
position on the horse it will fall to the down position. It moves like butta
Again, thanks for all the replies and suggestions

sidenote....rereading this reply, sounds almost kinky.....shaft, lube, upand
down.....ahh, but I digresseg




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Zz Yzx wrote:
On Thu, 23 Feb 2012 08:14:04 -0500, "Mike Marlow"
wrote:

. Try to heat the pin. Ultimately, you would want to
get the pin red hot if you could.


Heat the pin? Won't that just make it tighter?

(Sorry if I'm being ignorant).


Not ignorant at all. Heat actually expands metal, but with such a big heat
sink as the casting is, heating the pin is likely to break the rust bonds
inside and free it up, with less effort/heating time. Heating the casting
would be the right thing to do in order to swell it, but most times just
breaking the rust bond is all you need to do.

--

-Mike-



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Default Trunion help

On Thu, 23 Feb 2012 22:35:29 -0500, "Mike Marlow"
wrote:

Zz Yzx wrote:
On Thu, 23 Feb 2012 08:14:04 -0500, "Mike Marlow"
wrote:

. Try to heat the pin. Ultimately, you would want to
get the pin red hot if you could.


Heat the pin? Won't that just make it tighter?

(Sorry if I'm being ignorant).


Not ignorant at all. Heat actually expands metal, but with such a big heat
sink as the casting is, heating the pin is likely to break the rust bonds
inside and free it up, with less effort/heating time. Heating the casting
would be the right thing to do in order to swell it, but most times just
breaking the rust bond is all you need to do.


thx
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"ChairMan" wrote in message
m...
does anyone have any suggestions on how to get this shaft out?
My saw (Rockwell contractor saw) has been very hard to raise the blade, so
breaking it down the reason lies here. It won't move.
I've used some penetrating oil to try to loosen it up, no help so far
take it to a machine shop and have it pressed out?
suggestions?
TIA

Glad you got it out. FYI if you have never heard of Rust Buster get some to
keep handy. I have used it for years. Had a shaft a 20 ton press would not
remove. Rusted. Applied Rust Buster and in a few minutes push it out with
my hand. This stuff eats rust fast. Used this many times when I was in
major appliance work. WW



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Default Trunion help - rust buster01.JPG (0/1)

On Sat, 25 Feb 2012 09:40:18 -0700, "WW"
wrote:


"ChairMan" wrote in message
om...
does anyone have any suggestions on how to get this shaft out?
My saw (Rockwell contractor saw) has been very hard to raise the blade, so
breaking it down the reason lies here. It won't move.
I've used some penetrating oil to try to loosen it up, no help so far
take it to a machine shop and have it pressed out?
suggestions?
TIA

Glad you got it out. FYI if you have never heard of Rust Buster get some to
keep handy. I have used it for years. Had a shaft a 20 ton press would not
remove. Rusted. Applied Rust Buster and in a few minutes push it out with
my hand. This stuff eats rust fast. Used this many times when I was in
major appliance work. WW


Is this the Rust Buster you mentioned?
Who makes it?
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"Buddy" wrote in message
..

That is it. WW.


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