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Old 09-15-2010, 12:21 PM
LW Hiway's Avatar
LW Hiway LW Hiway is offline
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Default Morgan Vise, broken....sigh

Jim asked me this morning if it was possible to weld/re-weld the threaded portion of the vice for the screw assy.

It split where it has been welded in the past and I really see no viable reason to try and weld it again, particularly because of the reason it broke again this time.

Sometimes trying to tighten up the screw on a vise with a 48" cheater, because your going to be using a 10' cheater with a 48" pipe wrench just outright exceeds the limitations of the tooling.

I wonder if a threaded sleeve/cylinder of this thread type could be found and then welded to the center slide?

Or could the whole thread and thing be bought these days?

Morgan Vise Co.
Chicago 289
Jaws-- 1 3/4" X 6"
Height-- 15 3/8" tall (from base to top of jaws)
Base Dia-- 9 1/2"
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Old 09-15-2010, 12:26 PM
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Ironman Ironman is offline
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Default

LW, I think you need a bigger vise.
The welding option would work for normal usage, but after the second attack on it, there may be too many micro cracks in the area of failure to repair it.

But ya know, anyone with a mill and a lathe could make a steel nut and wedge assembly to replace the cast one. That way you could twist off the acme thread next time :-)
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Old 09-15-2010, 04:37 PM
LW Hiway's Avatar
LW Hiway LW Hiway is offline
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Default

After looking at the vise at Jims yard this morning, I suggested that what he needs to do is to quit using cheater pipes to tighten down on the vises, and to get a pipe chain type vise for the larger pipe and assorted needs as such.

Because of the physical size of the part that's broken and because of where it broke specifically, I doubt that making or buying another(if that would even be possible) would make the vise last any longer than before.

The physical sizing needs for that threaded portion of the broken part has to be cylindrical on the o.d. and cannot be any larger in thickness than it is originally, otherwise, it will not fit in it's slot.

And, BTW, if I could cut threads that looked better than a sorry attempt at knurling, I'd be calling myself a machinist.

As it's been welded once already on both sides, I know that any further attempts at welding will be met with quick failure, if not losing what internal thread of quality could be had.

He has two other vises of like size that are broken likewise, one in several pieces.
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God, if you would grant me one request through Prayer, please help me be the Man my Dog thinks I am. Please.

Quoting "The Hunt". "A man will walk into hell with both eyes and arms wide open. His dog will know better."

I never thought I'd live long enough to become a grumpy old bastard. Here I am, killing it!
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Old 09-15-2010, 04:54 PM
LW Hiway's Avatar
LW Hiway LW Hiway is offline
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Default Printable PDF Acme Thread Pitch Gage sheet

While looking for threaded sleeves I ran across this printable Pitch Gage sheet in PDF.

Actually, after looking closely at the lead screw, It's not ACME thread, it's a Square Profile thread.
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God, if you would grant me one request through Prayer, please help me be the Man my Dog thinks I am. Please.

Quoting "The Hunt". "A man will walk into hell with both eyes and arms wide open. His dog will know better."

I never thought I'd live long enough to become a grumpy old bastard. Here I am, killing it!

Last edited by LW Hiway; 09-15-2010 at 05:01 PM.
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