shattering spur gears

[jt-racing770]

hi, is anyone havin a problem with the 48tooth spur gear shattering after bout 6/7 heats?

[Sam Gray]

is it splitting on the axel???

[jt-racing770]

hi sam, its splitin in between where the wheel connects to the spur n the spur teeth

[jt-racing770]

is it splitting on the axel???

hi sam, thanks for replying, its split in between where the wheel connects to the spur and the spur teeth

[jay_m]

ive been told to keep them moist then it reduces the breakeages its working for me!

[Sam Gray]

hi sam, its splitin in between where the wheel connects to the spur n the spur teeth

there is a clip that you can put over the shaft of the spur gear to avoid this. Like a twit i can't remember what they are called:o:mad: Jay runs them hope he can post but when i remember will post it. Well for starters it is round with like wings on the sides and gives a spring affect in the shaft so that it is held together, they can be fpound in your local diy shop i would have thought. Will get back to ya wen i remember what they r called:)

[jay_m]

there is a clip that you can put over the shaft of the spur gear to avoid this. Like a twit i can't remember what they are called:o:mad: Jay runs them hope he can post but when i remember will post it. Well for starters it is round with like wings on the sides and gives a spring affect in the shaft so that it is held together, they can be fpound in your local diy shop i would have thought. Will get back to ya wen i remember what they r called:)

its called a double ear clamp (used to sear pipes) it does make a difference (also stops the twisting of the axel)
if you type that into google it should come up or pm me if not dude
hope this has helped!


jay

[theflame]

I used to boil mine in a pan for about 20, 25 minutes - seemed to help a lot! Dunno why, mind...

[Mark Stiles]

I used to boil mine in a pan for about 20, 25 minutes - seemed to help a lot! Dunno why, mind...

Heating the nylon relieves stresses inside its structure. When its moulded, if it cools a bit quick the structure is left quite brittle and prone to breaking on sudden impact.

Its exactly the same as hardening/tempering steel - to do that you heat it up and cool it quickly. Makes it hard, but brittle. Heating it again and letting it cool slowly tempers it and makes it tougher again (but softer too).

[theflame]

Ahhhh, that makes sense - thanks a lot Mark!

[Slim_Shady_01]

hi, is anyone havin a problem with the 48tooth spur gear shattering after bout 6/7 heats?

stop hitting things that should help :D

[jt-racing770]

ha ha ha at least i aint volleyed it across the hall yet lol :D

[Slim_Shady_01]

ha ha ha at least i aint volleyed it across the hall yet lol :D

maybe thats where you are going wrong.....

mines took a kicking, nothing broke and it flew on sunday! swift kick in the ribs before every meeting does wonders :eek: (i just dont usualy do it in such public surroundings) :D