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Thread: Broken cast bracket
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30th Jan 2021, 12:50 PM #1
Broken cast bracket
Need some suggestions on the best way to fix this,
Just got a this from Dale(member hear)
Power Hacksaw
An this bracket is broken.
My thoughts were, but I’m happy to be advised otherwise, is too insert two steel pins either side of the bolt hole(2.5 /3mm ?)
Then braze the joint as well.
I imagine there is a little bit of force on the bracket being a guide runner.
Would this work?
Or should I try an make one from scratch?
Cheers Matt.
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30th Jan 2021, 01:23 PM #2Most Valued Member
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Sounds reasonable to me, but the other method that jumps out at me would be to cut the end off the main part of the bracket and make up a flat piece from steel to replace the bit that’s broken off.
Drill and tap the bracket for a couple of cap screws to bolt the two together.
Not a good solution if you want to keep it looking perfectly original though.
Steve
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30th Jan 2021, 01:48 PM #3
Steve that’s not a bad idea either.
I do want to keep it looking original,but your suggestion could be made to work as well.
Cheers Matt.
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30th Jan 2021, 02:17 PM #4China
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Just Braze it, just about all the various old hacksaws have one or more parts brazed.
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30th Jan 2021, 03:07 PM #5Golden Member
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A replacement part could be cast using the original, glued up, as a pattern. Quite a few people on here do casting; being a small part it could be added to another pour. I'd offer but it sadly looks like being months before I get a chance to do any casting.
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30th Jan 2021, 03:25 PM #6
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30th Jan 2021, 03:39 PM #7
That saw looks familiar, I sold that to Dale near enough to 10 years ago.....
Didn't have a broken casting then Dale
It could be powder spray welded. I have all the gear to do it, but it is quite expensive between the Oxy/Acet and the powder...
If I can help in any way drop me a line.
MattWarning Disclaimer
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30th Jan 2021, 03:53 PM #8Most Valued Member
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stainless rod, bzzzzzt, done.......
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30th Jan 2021, 04:06 PM #9Senior Member
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30th Jan 2021, 04:20 PM #10Diamond Member
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Its a channel with a boss, 2 threaded holes and a plain hole.
If it were me I would mill a functionally similar item from a suitable piece of mild steel and never have to worry about the quality of the join.
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30th Jan 2021, 04:39 PM #11
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30th Jan 2021, 04:46 PM #12Most Valued Member
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steve you can weld a few metals with a stainless rod, whether they stay welded is the question though....
The pro's would probably say no......but I am not a pro welder so that means that I can weld cast iron with stainless rods and have done a number of times, mostly successfully, sometimes not, depends on the cast iron.
I use 316L stainless rods, yes you can weld cast iron, steel to cast iron, high speed steel to mild steel, but you can only do this if you are not a Pro welder
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30th Jan 2021, 05:41 PM #13Senior Member
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30th Jan 2021, 07:58 PM #14Most Valued Member
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Can I ask why you chose stainless electrodes for cast as they offer no advantage over a low hydrogen electrode and cost more? The dissimilar metal go to used to be Weldall electrodes which are a 312 grade stainless electrode and they specifically caution against using them on cast iron. Low Hydrogen electrodes will produce a good weld on cast iron that cannot be drilled or machined as a rule. If you need to drill or machine the deposit, then nickel electrodes are the choice. For best results one of the Eutectic offerings can not be beaten, but expect to pay upwards of $180/Kg for them. As with all cast iron welding, preheat and cooling is the key to success.
Stainless electrodes have developed an undeserved reputation for welding everything and while they do have their place, there are often better and cheaper options.
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30th Jan 2021, 08:44 PM #15Most Valued Member
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G/day Karl, because I have them, have used them to successfully weld cast iron many times and have no need to run off and
buy other rods to do a cast welding job. I used to use Castcraft rods but have not had them for years.
Do you realize that you just proved my point that I made, twice......
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