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Thread: Offset Dawn Vice Repair
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31st October 2014, 07:13 AM #16GOLD MEMBER
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Hi there,
If that vice was the right price then I think you got a bargain. It looks to be a reasonably straight forward repair using the advice already given. JB weld would come up nice with a lick of paint.
SimonGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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31st October 2014, 07:33 AM #17
A question from the sidelines from someone who is curious
I've heard about this JB weld stuff, will it work in a situation where it will be pounded?
I imagine a situation as here in a vice it is likely to get some beating, not directly but I'd expect some force when something held in the vice is bashedregards
Nick
veni, vidi, tornavi
Without wood it's just ...
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31st October 2014, 07:52 AM #18GOLD MEMBER
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Hi Michael,
we have an old Dawn offset Vice in the workshop at work. I'm on night shift tonight so I can have a look, remove the jaws and take some pics and measurements if that helps… Can't be sure it's the same size but that will become obvious from the pics and measurements.
SimonGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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31st October 2014, 08:22 AM #19GOLD MEMBER
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31st October 2014, 05:29 PM #20Philomath in training
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Thanks Simon. The size will be cast into the side of the moving jaw.
Mark is making his own decisions about how to repair - I'm just doing the jaws as I offered to do in post 12. Dawn won't hand out drawings and Tennant Creek is a bit far for me to pop up and measure so I thought I'd ask the question here to save some time as it may be some time before he is able to personally check.
The main issue is the lack of jaws. The broken away piece is probably not critical so could wait. Without jaws though it is a piece of scrap CI.
Michael
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31st October 2014, 11:06 PM #21GOLD MEMBER
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This one may not be the same. Looks like a metric equivalent to a 4"!
Of course I forgot to bring some verniers to get a half decent measurement! Ill measure the bolt spacings tomorrow night if thats ok?
SimonGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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1st November 2014, 07:01 AM #22Philomath in training
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1st November 2014, 07:19 AM #23GOLD MEMBER
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Yea. I can still take measurements but I will most likely be pointless.
SimonGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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1st November 2014, 03:08 PM #24Intermediate Member
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My old Dawn Vices
Had a look this morning and took some photos of a 4" vice and a 4.5" vice which may help. The Both are standard but the 4.5" one may have the same jaws as the damaged one. Have not had time to remove a jaw bur the measurements from the 4.5" jaws are:
Length 4.55" ; Height 0.85" ; Thickness 0.5". Fixing hole centres 2.75". Screw head recess 0.46" approx. Screw head recess od to top of jaw 0.26" approx ; to bottom of jaw 0.15" approx. Sorry I am not able to make a drawing to add to the photos. If any more info required I may be able to get tomorrow or even remove a jaw.
Photos of the 4" vice show an interesting ancient repair.
The 4'5" vice is the one with the jaws wide open.
Regards, Normanby
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1st November 2014, 05:57 PM #25Philomath in training
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Normanby, I think you may have the very jaws I need to re-create
Thanks for the info.
Michael
(I love the way people pitch in to help around here)
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1st November 2014, 09:24 PM #26Senior Member
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Dawn Vice Jaws 150mm
I have a pair of those Offset Dawn vice jaws in 150mm. You pay the post bloke, i will send them to you. Will post the pics of them on Sunday 02/11/14. Its late here in the West now.
DD
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1st November 2014, 09:48 PM #27Philomath in training
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Thanks for the thought DD, but the vice is only 4.5" long.
Happy to make some up for Mark.
Michael
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3rd November 2014, 11:36 PM #28GOLD MEMBER
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While I appreciate the difficulties of distance and transport, it really is sacrilege to bodgy up a Dawn vice with JB Weld.
A proper repair may cost a few dollars, but has anyone priced a new Dawn vice lately? Surely it would be an investment to repair the vice properly?
I reckon if it were mine, I would build the area up with Nickel electrodes and machine, (or grind and file carefully), then re tap the thread. If there was a serious concern about hard nodules then a tapped steel insert could be placed prior to welding.
I cannot see how JB Weld will withstand the same pounding that the Dawn vice will and any epoxy just adds difficulty to the proper repair at a later stage.
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4th November 2014, 08:33 AM #29
Do not put any second of glue on cast iron that may be welded- never ever!!!!
I agree with Karl on this. When all is said and done JB Weld is still just an epoxy glue and will have the properties of an epoxy glue, none of which include being able to beat the beajesus out of it.
Not that the vice, however strong is suitable for holding something that is to be subject to that sort of treatment.
I suspect such people who would do that could break an anvil with a rubber hammer anyway.
There is no substitute for repairing a quality tool properly, the first time. Even brazing with a manganese bronze is far better than JB weld which would not be able to be drilled and tapped for the vice jaw screw thread.
For those that attempt cast iron repairs with any sort of glue, please know that the glue just does not burn off when torch or arc based repairs are needed .It finds its way into the very pores of the metal, making said welded repair nigh impossible and imbues the welder with homicidal thoughts towards the instigator of this stupid act. For goodness sake do the repair properly. Better the Pita thing of distance be a one time thing than a second or multiple times.
Grahame
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4th November 2014, 10:28 AM #30GOLD MEMBER
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