buggy go kart thing with overpriced cm250 engine

[fowler]

i finished the back swing arm mounts then i added some supports
i tryed the straight line welding and f***ed it so i did the overlapping circles that went well
got so pics just waiting for the pics to be mailed from a mates camera

 

[fowler]

welding is still not as good as it needs to be
the top is straight line weld and the bottom is the standard zig zag
the other pic is the rear swing arm
im just going to spend the next day or so getting the circles right then mount the engine

 

[brendonv]

The welding reminds me of my first welds on my kart. Look horrible and im unsure at how they hold but ive had 100kg+ people on my kart and it hasnt broken for the 2 years ive had it.

 

[fowler]

looks bad and proberbly wont trust it on a real car or anything huge
but for this scale i will trust it

 

[redsox985]

Practice(learn) on scrap THEN weld kart.

 

[The_Machine]

looks strong enough to me, although not pretty

 

[fowler]

did some pracice on some scrape metal
jagged one ultimate weld then i couldnt replicate it
they were alright though got pics to out up soon

 

[Cam]

Try when your practicing on some 6mm+ scrap plate, it absorbs the heat better and its easier to practice on

Just keep that little molten pool behind the wire, and your hand movements consistant,

Sometimes the tip is resting on the steel and as your going along it stutters and jumps.

Like how the project is going.

Cheers, Cam.

 

[fowler]

i was using 1.6 mm wall 2cm box tube
long story but teacher has pics of progress

 

[fowler]

better?
what am i looking for
what is better
what can i improve on the better one

thankyou

 

[fowler]

just starting to make the rear sprocket hub
love useing the plasma cutter
i was impresed it could cut the 1cm steel sheet

 

[r97]

first pic going from top to bottom, first weld looks okay (circles! or triangles or whatever method you prefer) most importantly it has a heat signutare, second bead doesnt look great and no heat signurature, bottom one has a great bead butno heat signature, so it looks nice but breaks easly. the second pic has a nice bead and what looks like a heat signature but the metal is spaced too far apart. this is just my opinoin, dont rely on me to judge your welds strength have someone look at them in person, and test them with mr vise clamp and uncle sledge hammer, good luck

 

[fowler]

non of the teachers at school can realy weld (they taught me the ziz zaz)
but i did bash the crap outa it with a malet to no result

 

[r97]

one thing ive noticed is that welded tube it much stronger try welding two peices of flat bar then bash em,try to find someone who can weld or ask this guy http://www.weldingtipsandtricks.com/

 

[fowler]

i dont get the mega sentence

 

[redsox985]

Hahaha. Ok the first picture. I like the bottom weld the most, the bead looks good but it looks like it's sitting on the metal. The second picture has a good bead and maybe even too much penetration. Do you see how it looks like it ate away at the edge of the metal? That's my only concern.

 

[r97]

sry, im saying try welding flat bar together and whacking it with a sledge hammer because its more of a test of your weld. and redsox, if you ask me nothing penetraits too much unless it burns through

 

[fowler]

nealy finished making the sprocket hub
sorry for the deathly slow pace if anyone is acctually following this build
i only get 45 mins day and only 4 days in the week

 

[fowler]

ok this is my reson for makeing the sprocket hub
when picked up the engine me and a mate worked out the drive chain that came from the quad bike and matches the rear sprocket shoud fit on the drive sharft

but when i was able to get the engine to the DT centre and remove the flywheel caseing and replace the drive sprocket it became evident i was badly mistaken and it isnt close to fiting

the only options were to either buy a new drive sprocket or make the free rear sprocket that came free with the engine
fit on the axil
so i chose the cheap option and i had to make a conversion to make it fit
this is the result so far
the first pic shows the gold sprocket that came off and the silver onre is going on
the second pic is the two drive sprockets (it is evident how wrong i was
the third pic is the convertion ( a 1cm barby plate that i remodeled)
EDIT
wait what are securaty tokens it wont let me upload pics

 

[fowler]

o turns out i need every thing in paint and re save it
even though it was already jpeg