jb weld

[homedepotpro]

how strong is it. I want to use it the mount a sprocket of a drive spindle. the the engine is ~30cc. do you think it will hold. the sprocket it s pretty tight fight but the torque from the motor made it slip, do you think jb weld will stop it from slipping

[MrCrowley]

Tensile strength: 3960 psi
Adhesive strength: 1800 psi
Flexural strength: 7320 psi
Compressive strength: 10733 psi
Shore D hardness: 85 (1 week)
Shrinkage: 0.0%

I repair leaks on my guns with it, I've managed to get some leaks to seal up to 130psi with it, as long as you mix it well and apply it correctly it should be fine. Though it does have a habbit of cracking if hit hard or dropped i've noticed

[homedepotpro]

im not very familiar with it. i don't know if youve every built something like this before but do you thing it will work for this application. btw what it flexural strength

[spudbud101]

I don't think it will hold. This is epoxy we're talking about here.

[MrCrowley]

Yeah but bloody great epoxy. Probably one of the best commercialized epoxy there is

[spudbud101]

Great as it may be (I do agree, though, best there is), I don't think any epoxy will seriously handle this type of application.

[turbohacker]

WELD IT!!!
Take it to a machine shop and ask them to put a quick spot weld on it, it wont cost $5, they will probobly do it for free if you are nice to them.

JB weld will not work in this app.

Another idea is to cut a groove into the sroket and axle and put a keyway into it. You could probobly do this with a simple angle grinder instead if a mill.

[chaos]

WELD IT!!!
Take it to a machine shop and ask them to put a quick spot weld on it, it wont cost $5, they will probobly do it for free if you are nice to them.

JB weld will not work in this app.

Another idea is to cut a groove into the sroket and axle and put a keyway into it. You could probobly do this with a simple angle grinder instead if a mill.

I agree with turbohacker, dont take the cheats way out.

a key would be perfect but by the sounds of it you probably cant get a keyway cut into an axle (without it costing anything anyways).

[TurboSuper]

I know JB weld works on cracked engine blocks, but I wouldn't trust it to hold something under constant tension like that.

[homedepotpro]

i have thought of those options already. the problem is, i can't take it out of the case

I had to permanently attach the spark plug and you can't take the motor out of the case without first removing the plug. I was planning of cutting of the chain guard to access the spindle and just making a quick fix. Btw im not planning to make a machine extreme with longevity. Also the sprocket is plastic, its from a chain detailer( i know, please don't give me a hard time, it was all i could find ).

[rednecktatertosser]

Where are you at cause if your near austin eithr me or my neighbor(a professional field weldor in the oil rig industry) sould do it for you.

[hi]

doesnt that thing have to have some sort of transmition? when you stop you will have to turn off the motor, or am i missing something extreamly obvious?

anyway, i am with the guys that say you should take it to a welding shop. jb weld i think was originally designed for radiator leaks i think, not for putting on sprokets. it may work for a little bit, but would eventually break.

[homedepotpro]

i epoxied it anyway. its directly attached to the drive shaft. I compression start the scooter by pushing it. I removed the clutch because it not designed for this kind of app and it would have burned up real quick. btw i live in Washington. If i get this thing to run i will tell you guys. lets just consider this an experiment, all i can hope for is positive results.