Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work.

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Old September 10th 07, 10:00 PM posted to rec.crafts.metalworking
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Default slip roll?

I have located a 30" sheet metal slip roll in my general area. It's about 2
hours away by car. It isn't new, looks to be solid old US. I have only seen
one photo.

The seller states that there is no maker's name on it anywhere, nor any
nameplate data. Is there any way to infer the max thickness it can handle?

He says there is surface rust on the rolls. I figure I can knock most of it
off easily with a 3M pad and just use it. Does this make sense to you?

Thanks,

GWE

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Old September 10th 07, 10:47 PM posted to rec.crafts.metalworking
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Default slip roll?

On Sep 10, 1:00 pm, Grant Erwin wrote:
I have located a 30" sheet metal slip roll in my general area. It's about 2
hours away by car. It isn't new, looks to be solid old US. I have only seen
one photo.

The seller states that there is no maker's name on it anywhere, nor any
nameplate data. Is there any way to infer the max thickness it can handle?

He says there is surface rust on the rolls. I figure I can knock most of it
off easily with a 3M pad and just use it. Does this make sense to you?

Thanks,

GWE


I have never used one, but can't a person make multiple passes on the
material and increase the curve each pass? Is this a motor driven roll
or a hand-cranked unit?

I guess you could crank up the top roll and insert a straight edge and
measure from the bottom of the straight edge to the bottom of the
middle roll.

How far can you go in two hours, given the traffic problems in Puget
Sound area?

Used to live in Issaquah area.

best regards,

Paul

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Old September 10th 07, 10:56 PM posted to rec.crafts.metalworking
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Default slip roll?

wrote:

On Sep 10, 1:00 pm, Grant Erwin wrote:

I have located a 30" sheet metal slip roll in my general area. It's about 2
hours away by car. It isn't new, looks to be solid old US. I have only seen
one photo.

The seller states that there is no maker's name on it anywhere, nor any
nameplate data. Is there any way to infer the max thickness it can handle?

He says there is surface rust on the rolls. I figure I can knock most of it
off easily with a 3M pad and just use it. Does this make sense to you?

Thanks,

GWE



I have never used one, but can't a person make multiple passes on the
material and increase the curve each pass? Is this a motor driven roll
or a hand-cranked unit?


Hand cranked. To my knowledge, all slip rolls use multiple passes.

I guess you could crank up the top roll and insert a straight edge and
measure from the bottom of the straight edge to the bottom of the
middle roll.


The difference between an opening that will admit 22 gauge and 16 gauge is
only a few thousandths. I doubt max opening is related. I suspect it will
have to do with the diameter and length of the rolls.

How far can you go in two hours, given the traffic problems in Puget
Sound area?


I can go a long ways. I just don't go where/when the traffic is. It might
take me longer to get back, though.

Used to live in Issaquah area.


Ah. That explains your traffic concern. That place has the very worst traffic in
the area.

GWE
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Old September 10th 07, 11:11 PM posted to rec.crafts.metalworking
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Default slip roll?

You can infer some by gauging the thickness of the frame and rollers.
Generally, I would assume for a 30" unit, max would be around 20-22ga.
MAYBE 18ga.
JR
Dweller in thecellar

Grant Erwin wrote:

I have located a 30" sheet metal slip roll in my general area. It's about 2
hours away by car. It isn't new, looks to be solid old US. I have only seen
one photo.

The seller states that there is no maker's name on it anywhere, nor any
nameplate data. Is there any way to infer the max thickness it can handle?

He says there is surface rust on the rolls. I figure I can knock most of it
off easily with a 3M pad and just use it. Does this make sense to you?

Thanks,

GWE



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Old September 10th 07, 11:20 PM posted to rec.crafts.metalworking
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Default slip roll?

You didn't give address and phone number and GPS coordinates of the
location.

I have been looking for one about that size that'll handle 16 Ga. It
seems from my unscientific research that if the rolls are 1 1/2" or 2"
diameter, the thing is probably limited to about 20 Ga. 3" rolls and
hefty looking bearing surfaces would indicate 16 Ga. I, of course,
want one the has 1 1/2" diameter rolls only needs to be 30 inches wide
AND does 16 Ga.
Also, I have noticed that finding 16 GA machines in the 30" range
and narrower are very hard to do. EX: the only HF slip roll I find
that handles 16 GA is 50 inches wide and costs about $900. I have
looked around some with no better results.
OTOH, I do have a friend that has a slip roll that is only 12" wide
and 3" diameter rolls. (too short for my needs.)

While I was searching (unsuccessfully) for the website of a local
company that sells this stuff used, I ran across this neat webpage on
how to run a slip (plate) roll:
http://www.americanmachinetools.com/bending_rolls.htm

Pete Stanaitis
--------------------

Grant Erwin wrote:

I have located a 30" sheet metal slip roll in my general area. It's about 2
hours away by car. It isn't new, looks to be solid old US. I have only seen
one photo.

The seller states that there is no maker's name on it anywhere, nor any
nameplate data. Is there any way to infer the max thickness it can handle?

He says there is surface rust on the rolls. I figure I can knock most of it
off easily with a 3M pad and just use it. Does this make sense to you?

Thanks,

GWE



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Old September 10th 07, 11:24 PM posted to rec.crafts.metalworking
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Default slip roll?

Max capacity is pretty much a function of the roller diameter and
length. A 30" with 1-1/2" diameter roll would be 22 or 24 ga , 2" roll
should go to something like 20 ga or maybe 18 ga.

A rough roll finish will transfer over to the finished product. If you
don't do polished work, it shouldn't matter too much.

These things aren't too expensive on the used market or new imports. A
nice new one from Grizzly is less than $500
http://www.grizzly.com/catalog/2007/Main/573

Grant Erwin wrote:
I have located a 30" sheet metal slip roll in my general area. It's about 2
hours away by car. It isn't new, looks to be solid old US. I have only seen
one photo.

The seller states that there is no maker's name on it anywhere, nor any
nameplate data. Is there any way to infer the max thickness it can handle?

He says there is surface rust on the rolls. I figure I can knock most of it
off easily with a 3M pad and just use it. Does this make sense to you?

Thanks,

GWE

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Old September 10th 07, 11:35 PM posted to rec.crafts.metalworking
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Default slip roll?



Grant Erwin wrote:

I have located a 30" sheet metal slip roll in my general area. It's
about 2
hours away by car. It isn't new, looks to be solid old US. I have only
seen
one photo.

The seller states that there is no maker's name on it anywhere, nor any
nameplate data. Is there any way to infer the max thickness it can
handle?

He says there is surface rust on the rolls. I figure I can knock most
of it
off easily with a 3M pad and just use it. Does this make sense to you?

Thanks,

GWE


Can't help with the thickness but I currently have on loan an old 36" x
2" diameter roller slip roll, I would like to know its capacity. I got
it from my mate who had been storing it with a mate, the mate had it
outside and with no apparent protection. I put the rollers in my old 11"
x 40" lathe and ran a belt sander over them and they cleaned up a treat,
far better than the rusty things I got after storage outside. They did
the intended taper rolling job fine and I still have them taking up
space, must get them moved now the owner has more than ample indoor
storage for them.

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Old September 11th 07, 12:51 AM posted to rec.crafts.metalworking
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Default slip roll?

On Mon, 10 Sep 2007 13:00:49 -0700, Grant Erwin
wrote:

I have located a 30" sheet metal slip roll in my general area. It's about 2
hours away by car. It isn't new, looks to be solid old US. I have only seen
one photo.

The seller states that there is no maker's name on it anywhere, nor any
nameplate data. Is there any way to infer the max thickness it can handle?

He says there is surface rust on the rolls. I figure I can knock most of it
off easily with a 3M pad and just use it. Does this make sense to you?

Thanks,

GWE


Just for some gee whiz entertainment: I worked briefly as a welder at
a OEM boiler manufacturer. They had a roller that could form 2.5 inch
thick or better steel into boiler bodies. It was HUGE......as in
GIANT......as in it wouldn't fit in your shop BIG.
Dave
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Old September 11th 07, 01:22 AM posted to rec.crafts.metalworking
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Default slip roll?

Not that big but one of the rolls in the shop I started in had a roll
that did 8' wide x26' long x3/8" thick into 8' diameter tubes. Run by an
old gent that had serious problems with basic math. But us fabricators
really appreciated that his stuff was ROUND. Dead on round. Made life so
much easier to assemble...........

dav1936531 wrote:
On Mon, 10 Sep 2007 13:00:49 -0700, Grant Erwin
wrote:

I have located a 30" sheet metal slip roll in my general area. It's about 2
hours away by car. It isn't new, looks to be solid old US. I have only seen
one photo.

The seller states that there is no maker's name on it anywhere, nor any
nameplate data. Is there any way to infer the max thickness it can handle?

He says there is surface rust on the rolls. I figure I can knock most of it
off easily with a 3M pad and just use it. Does this make sense to you?

Thanks,

GWE


Just for some gee whiz entertainment: I worked briefly as a welder at
a OEM boiler manufacturer. They had a roller that could form 2.5 inch
thick or better steel into boiler bodies. It was HUGE......as in
GIANT......as in it wouldn't fit in your shop BIG.
Dave

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Old September 11th 07, 01:34 AM posted to rec.crafts.metalworking
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Posts: 328
Default slip roll?


On Mon, 10 Sep 2007 13:00:49 -0700, Grant Erwin
wrote:

I have located a 30" sheet metal slip roll in my general area. It's
about 2
hours away by car. It isn't new, looks to be solid old US. I have
only seen
one photo.

The seller states that there is no maker's name on it anywhere, nor any
nameplate data. Is there any way to infer the max thickness it can
handle?

He says there is surface rust on the rolls. I figure I can knock most
of it
off easily with a 3M pad and just use it. Does this make sense to you?

Thanks,

GWE


I appreciate everyone's input. Assuming it turns out to be a 20 gauge roll,
can you roll thicker pieces if they are only e.g. 6" wide? For example,
could you get away with rolling a tube from 16 gauge steel 6x20"? With
the 6" side fed into the rolls, I mean.

Grant


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