Cheap migs are usually low powered and useless for welding thick material (Above 3mm). Cheap migs come with crappy wire feeds, crappy regulators and tiny stupidly expensive gas bottles.
If you want to weld thicker material you need high power mig with decent wire feed and larger gas bottles other wise your wasting your time with a Mig IMO. . . . .Thou I do agree they are very versatile if you have decent one.
Cheap stick welders with decent quality rods can weld thick steel with excellent results with a little time and practice. Far better and lot cheaper than a cheap mig for thicker material.
The combination of Pillar drill, Angle grinder, decent elec hand drill with a few basic tools like sharp scribes etc is all you need to make a very strong frame.
One good piece of equipment I recommend buying is set of transfer punch's like these. . .http://www.rdgtools.co.uk/acatalog/info_1791.html
They make transfering holes from one piece of metal to the other very accurate and easy.!! . . .Very good when making multple brackets etc.
I'm liking the punch set...I think I'll get myself one of those.
When you say micro thin cutting disk..what thickness are they? I have some 2.5mm discs already...how would they do?
Got a quote earlier for 50mm box steel (3mm) it does work out a lot cheaper, so I'm going that route.
Need to get the workshop sorted, then get on to designing the frame.
And how does a thicker disc increase cutting force on the grinder?
You shouldn't be forcing the disc into the metal anyway, as all you do is cause extra heat, wear the disc quicker, and put unecessary strain on the grinder.
Could probably find a better reference... but not now.
Jonathan, do you ever think that you overthink things too much?
If you're using a wider disc, feedrate isn't going to be the same. You could try and make it the same, but you'll need far more force than a multiple of the disc width difference, which then results in the disc wearing away quicker than it would normally (or clogging if you really push it), and most likely overheating the grinder.
Plus using a proper grinding disc for grinding puts far higher loads on a grinder than cutting, and if you're wearing grinders out, you're either doing something majorly wrong, or you want to buy better ones.
I'll leave it at that as I fear I'm going a bit off topic.
I don't even bother using an hacksaw to cut bolts etc anymore because these are just thin as hacksaw blades and slice thru bolts in seconds with perfect cut.
Edit: Ha ha ha . .The things we numpties will Argue over..!! . . . Thou it's nice to know it's not just me who argue's with Jonathan.!! . . . .Thou I agree with him completely on this occasion, less width = less friction obviously means less power & force required.!!. . Thats gota be a first eh Jonathan. .:lol:
Last edited by JAZZCNC; 19-10-2011 at 09:42 PM.
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