spur gear tightness

[alexwright]

how tight do people set their spur gear nut?
hpi tutorial says tighten it into the spring as tight as possible then back it off 1/2 a turn

savage x 4.6

 

[Jam Racing 1]

most here run it tightened all the way down, it will still slip and protect the trans gears, just remember to land jumps off throttle and you will be fine....

 

[X]

Lock it down. Remember, I mentioned this in your other thread.

 

[alexwright]

so not back it off half a turn?
what effect will it have locking it down against having it backed off half a turn?

 

[Jam Racing 1]

backing it off as HPI recommends will cause it to slip and heat the spur gear and hastening it failing...

 

[X]

Any looseness, even a half turn, will give the nut much more capability to back off. This will make you wear down your spur pad much quicker and cause slipping and heat. Lock nuts have a tendency to back out once given the opportunity, and then they must be replaced.

 

[alexwright]

thanks for the relays both.
as said above if I land a jump on throttle what is likely to happen if the nut is fully tight?

 

[Jam Racing 1]

Landing jumps on throttle can break gears in the transmission and other things, it is always best to land jumps off throttle...

 

[alexwright]

so would it not be more cost effective to have a spur gear over heat or break rather than the transition?
sorry to come across as difficult but I can't see the logic behind this. does the truck perform / accelerate better with no slip from the spur?

 

[Jam Racing 1]

so would it not be more cost effective to have a spur gear over heat or break rather than the transition?
sorry to come across as difficult but I can't see the logic behind this. does the truck perform / accelerate better with no slip from the spur?

yes it will accelerate better with the slipped locked down, it will still slip some when it is locked down, every time the spur strips out or melts the center out due to slipping hard you will find replacing the spur,slipper pad and nut and spring to get old fast..... for the ultimate in durable spur and bells look at Robinson Racing for their steel spur and bells, the spur and bells are extra hard and will outlast plastic stuff 100 to 1

http://www.robinsonracing.com/catalog/savage21-25.html
yes it says Savage 21/25 in the description but the spurs and bells fit all models without mods.....

 

[francis Labarbara]

I have gone threw 2 gallons of fuel with a locked slipper. The only thing I have broken was a dogbone.

 

[alexwright]

yes it will accelerate better with the slipped locked down, it will still slip some when it is locked down, every time the spur strips out or melts the center out due to slipping hard you will find replacing the spur,slipper pad and nut and spring to get old fast..... for the ultimate in durable spur and bells look at Robinson Racing for their steel spur and bells, the spur and bells are extra hard and will outlast plastic stuff 100 to 1

http://www.robinsonracing.com/catalog/savage21-25.html
yes it says Savage 21/25 in the description but the spurs and bells fit all models without mods.....

thanks this makes more sense to me know and I can understand why people lock it.
is there any reason the spur is plastic from factory against a metal clutch bell? if you have a metal spur that can't strip what will be damaged as a consequence?

 

[Jam Racing 1]

thanks this makes more sense to me know and I can understand why people lock it.
is there any reason the spur is plastic from factory against a metal clutch bell? if you have a metal spur that can't strip what will be damaged as a consequence?

Tough to say what else may be damaged, since I have been in this hobby I have seen everything damaged by some guys, stripped clutch bells all the way to bent chassis plates and engine plates broken, if there is a way to prevent this I have not found it as yet.......
you have to remember these are models with power systems in them and NOTHING will prevent them from breaking things, most guys drive them like they stole them and when you do this(and what fun would it be if you didn't) things are going to break...

 

[francis Labarbara]

Even when tight the slipper will slip. The only time a savage will move with the slipper 1/4-1/2 turn loose is with stock gearing, engine and tires. Change any of those things and the slipper will simply fail. Zero fun.