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21st July 2010, 10:33 AM #1
Master of the obvious
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Cast iron repair for table saw arbor arm
Hi All,
I've found a fault in arbor arm in a table saw I purchased second hand which is causing a blade misalignment. For details on the fault look here.
The only mechanism I can think of to fix the problem is to cut the component in half, bolt some steel plate onto it to get the alignment correct, then weld it back together.
I realise that welding cast iron is quite a different animal to steel, but, can it be done with basic arc gear? I'm confident welding large section steels with my existing stuff, is it a simple matter of the right rods and a little cooling caution, or should I consider a different solution first?
Dave."Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so."
- Douglas Adams
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21st July 2010 10:33 AM # ADSGoogle Adsense Advertisement
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21st July 2010, 10:59 AM #2
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Hi Dave
I wouldn't cut the casting. I would bore it out and then sleeve it or make an oversized shaft to fit the new oversized bore.
Welding cast can be done, but it my just move on you anyway and put you right back where you started.
You're sure it isn't meant to be like that?(I cant see it you can) going back won't be easy.
Stuart
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21st July 2010, 01:16 PM #3
Master of the obvious
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I'm sure it's not meant to be that way. This is the only critical dimension in the whole table that can't be adjusted by conventional means or with home workshop tools, it's also one of only two critical components that really need to be right from the factory, everything else can be corrected easily enough.
Originally Posted by Stustoys
I was thinking of having the bearing housing re-bored and fitting either sleeves or over-sized bearings, but the expense of this sort of operation could quickly outweight the original purchase price. Cutting and welding is attractive because it's cheap.
If there's a better option I'm all ears."Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so."
- Douglas Adams
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21st July 2010, 04:32 PM #4
2-legged animal
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I,ve brased cast iron with oxergen and LPG its easy enough but never tried with the arc . Did see some arc rods in Trade tools the other day for cast iron be interesting to here from someone that arc welds cast sometimes .
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27th July 2010, 02:11 PM #5
Master of the obvious
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The welding idea got ditched becasue it's too dangerous for the part. I've hacked 'engineered' another solution any way.
"Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so."
- Douglas Adams
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