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Forum topic by zlatanv posted 02-26-2010 04:42 AM 1084 views 0 times favorited 10 replies Add to Favorites Watch
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zlatanv

691 posts in 2694 days


02-26-2010 04:42 AM

Bought a clamp form Peachtree at the woodworking show in Oct, only used it a couple of times then saw a crack in it. Called Peachtree, they are sending me a new one. Looks like cast of some kind, can it be welded? will it weaken the metal after being heated?

-- Z, Rockwall, TX


10 replies so far

View flyingoak's profile

flyingoak

68 posts in 2568 days


#1 posted 02-26-2010 04:54 AM

if it is cast, you need a rod for cast iron to weld it. take it to a machine shop and they should be able to weld it.

-- where is the duct tape.....

View jayjay's profile

jayjay

639 posts in 2506 days


#2 posted 02-26-2010 05:54 AM

Assuming it’s cast iron, I would braze weld it, then sand it down to re-shape it. As small as the piece is, welding it with nickle rod would more than likely cause more problems and it would still be susceptible to cracking again. If it’s made from aluminum, it could be repaired rather easily by tig welding it. IMO, if you have accessibility to welding it, go for it, if not, I wouldn’t bother, I’d just buy a new one.

Just my 2 cents.

-- ~Jason~ , Albuquerque NM

View Kent Shepherd's profile

Kent Shepherd

2716 posts in 2746 days


#3 posted 02-27-2010 12:05 AM

Yes, it could probably be repaired, but, clamps aren’t that expensive. If you paid someone to weld it, you might as well buy a new one. I assume if you could weld you probably wouldn’t be asking us anyway.

-- http://shepherdtoolandsupply.com/

View SnowyRiver's profile

SnowyRiver

51452 posts in 2940 days


#4 posted 02-27-2010 01:16 AM

I agree with Kent. It probably would be better to just buy a new one. You could pay someone to weld it, but it might crack again if the casting is defective.

-- Wayne - Plymouth MN

View zlatanv's profile

zlatanv

691 posts in 2694 days


#5 posted 02-27-2010 01:22 AM

Thanks guys, I do have a small wire feed Lincoln Welder but have never tried to weld any cast stuff. Tried some aluminum rods before with decent results. Peace tree is replacing the clamp, but I thought I could do a little fixer up, and hey an extra clamp. Definitely not worth paying someone to fix it. Thanks.

-- Z, Rockwall, TX

View zlatanv's profile

zlatanv

691 posts in 2694 days


#6 posted 03-02-2010 02:17 AM

Gave it a shot and tried welding it, seems ok under pressure. Gave it a shot of paint and hung it on the wall. Another clamp, yeah! Will see if it lasts?

-- Z, Rockwall, TX

View lilredweldingrod's profile

lilredweldingrod

2495 posts in 2567 days


#7 posted 03-02-2010 02:49 AM

Just a note on welding cast iron. I have never found Ni-rod to be satisfactory. I have always preferred 3/32 304 stainless steel. Be sure to grind a V notch to the end of the crack, align and clamp the piece to be welded and start from the outside and work to the end of the crack. Never try to weld it in one pass. Cast iron expands and contracts much more than steel, so just place a tack, peen it with a chipping hammer and remove all slag. Try to never get it so hot that you cannot hold a gloved hand on the weld. If necessary, regrind after each tack to remove all inclusions. Take your time and you will have a strong repair.
I don’t know how many welders there out there, if I can be ofassistance, just PM me. Rand

View zlatanv's profile

zlatanv

691 posts in 2694 days


#8 posted 03-02-2010 06:26 AM

Thanks Rand, I used a wire feed with Innershield® NR-211-MP wire, used higher power setting, it seemed like it got in deep into the metal, ground it smooth , looks strong enough to hold a glue joint tight. Just kind of playing around with, always wanted to take a class on the basics, i like welding stuff.

-- Z, Rockwall, TX

View zlatanv's profile

zlatanv

691 posts in 2694 days


#9 posted 03-03-2010 04:38 AM

Well the paint dried on my repaired clamp, took it down to check it out, started to crank on some pressure to see how it holds, heard some crackling and there it goes, cracked again, :( .... gave it shot, now I have half a clamp for a hold down maybe or something else, a jig??

-- Z, Rockwall, TX

View lilredweldingrod's profile

lilredweldingrod

2495 posts in 2567 days


#10 posted 03-09-2010 07:13 AM

Z, you should be able to weld the clamp, but use the method I layed out above. You may have to make the carpy notch a bit deeper and wider to remove the innershield material. If it broke completely thru, all the better. now you can just weld it and not worry about the heat.
Do you have a little buzz box? AC OR DC or both? 3/32 stainless on DC reverse polarity will be a snap on this.

If you can remove the end from the bar and send it to me, I’ll be glad to weld it for you. Postage should be less than a new clamp. PM me. Rand

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