forgive what may be obvious questions to some, Im always up for learning new things!
I am a welder by trade. I do most of my work in the 100 (GTAW) - 500 (FCAW) amp range. Obviously i do most of my work on large things (excavators, loaders, lifting beams, etc) and only a bit on the smaller...
thats what i was thinking .... ;) i love my QCs ... i keep them on the truck so my torch isnt dangling off the side trying to find a ride home with someone else and so i dont have to fool with the wrench anymore.
i have better luck with ER4043 wire.
as for the black soot .... clean your joint better and try changing your gun angle. dont push or pull the weld ... stay 90* to your direction of travel (i have no idea why this works for me, but when i start getting black soot, my gun angle is off though...
i love my weldcraft torches. super flexible and a good mix between durable and light. Do watch the braided hoses ... keep them clean as debris abrades them over time with heavy use in nasty environments.
for a watercooled torch, WP-20. end of story. 250 amps ... light and flexible...
nice work!!! somehow, in my short time on this forum, im not surprised.
i see quick connects .... i do not see FlashBack arrestors (but most torches have them built in) .
two chains. you will go through oxygen twice as fast as acetylene. no need to leave a bottle of flammable gas / liquid unchained while you are changing out an empty.
well ... the bearing has all the information you need on it.
its a SM1010K .... from timken site:
dial-up death PDF file!!!!
http://www.timken.com/en-us/products/Documents/Timken-Ball-Bearings-Catalog.pdf
go to page D70 .... far left hand column (type A), 3rd from the top.
see if the...
the instructor / dean should know better. one of them is trying to save some money on material costs ... and in doing so, they are wasting the time (and subsequently the money) of the students.