New minibike build, and a few others..

[jr dragster T]

Its machined from solid steel? If so its concidered Billet. Fusion welding doesnt get the same kind of penetration and heat as MIG. Tig it if you want but I'm willing to bet the welds will crack after a while. If your good at MIG it will turn out very nice. Theres a reason why all the couplings on crankshaft dyno's are MIG'd and not tig'd.

 

[Raywelder]

Its machined from solid steel? If so its concidered Billet. Fusion welding doesnt get the same kind of penetration and heat as MIG. Tig it if you want but I'm willing to bet the welds will crack after a while. If your good at MIG it will turn out very nice. Theres a reason why all the couplings on crankshaft dyno's are MIG'd and not tig'd.

Oh, I guess it is then, learned something new then. but its black, not shiny, the flange is though.

I can mig good so I may just do that now.

 

[modelengineer]

TIG is stronger than MIG, all things being equal. And TIG can use filler rod just like MIG, not just autogenous (fusion) welding.

Just FYI.

 

[jr dragster T]

Tig it if you want but like I said I wouldnt be surprised if you started to see stress cracks down the road.

 

[Raywelder]

TIG is stronger than MIG, all things being equal. And TIG can use filler rod just like MIG, not just autogenous (fusion) welding.

Just FYI.

I know, I've been doing a bit of tig'n here and there, trying to learn it.

 

[modelengineer]

Whether you do MIG or TIG it, if it's a critical part like a crankshaft then it should be heat treated afterwards to avoid these stress cracks that Tyler mentioned.

 

[Raywelder]

I'll get some pics of the piece here soon.

 

[jr dragster T]

That would help greatly. Ultimatly a love-joy coupler style would be best to allow flexability without fatigue.

 

[Raywelder]

 

[jr dragster T]

Ohh so Its like those uni fit hubs you buy and slip them together and weld. I thought it was just 2 peices butted together. You would probably be fine TIG welding that as most of the stress is taken up by the hub fit. However the HP of that engine just could cause weld fatigue. It happens all the time on the chasis of our race cars.

 

[Raywelder]

Ohh so Its like those uni fit hubs you buy and slip them together and weld. I thought it was just 2 peices butted together. You would probably be fine TIG welding that as most of the stress is taken up by the hub fit. However the HP of that engine just could cause weld fatigue. It happens all the time on the chasis of our race cars.

Yea, bought the hub at tsc, then had the machinist make it fit the flange and shaft.

The machinist put the flange a tad higher than the hub for the purpose of fusing it.

You can see the heat marks where I welded it to a hub before but goofed and had to cut it back off.
So I might heat treat it just in case.

 

[Raywelder]

Ah what the heck, I just noticed that speedo has a trip meter.
But wheres the butttton?!

 

[Raywelder]

Must have missed this pic.
how it mates up.

Its setting in there sideways at the moment though.

 

[EagleTalons]

Eww what did you do to your hand?

 

[Raywelder]

Eww what did you do to your hand?

lol...
grinder mishap!

 

[Raywelder]

Well, I tig'd the top of it. About half of it perfect, the other side, has a bunch of pinholes in it from impurities.

But I ran four small mig beads on the other side of the flange just in case.

 

[jr dragster T]

Can we see the hub now

 

[Raywelder]

I'll take a pic of it when I get home.

 

[Raywelder]

Flash, Sucks

Finger over flash

You can see about halfway it starts getting pourous, and doenst look as good cause I went back over a few.
But that one half came out really good.

for my first tig Project, I'm tickled.

 

[modelengineer]

Looking good, I just bought a TIG welder this morning. Gas hire is really expensive

It's an IGBT 200 amp AC/DC with Pulse machine, made in China.