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Tamiya F104 Pro!

Old 05-23-2012, 02:23 PM
  #8296  
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Heyyy,this cant be right!

The spur adapter got loose from spur gear and then the spur gear started to wobble as far as the diff plates allowed it to move. -and pinion grinded the spur a bit...

(Using 86t 64p kinbrough spur and 12 balls)

-is the tamiya spur gear adapter supposed to be glued in the spur? or how it is supposed to stick there, the stock spur bearing cant be used so what am I missing here?

-the car is F104X1 if that matters



And I just installed 21.5 motor, is 86/31 ok to start? (2.77 fdr)

Any thoughts of what gearing is needed to be same speed as silvercans on stock 3.6 fdr?


-Pate
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Old 05-23-2012, 03:03 PM
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Originally Posted by fastvee View Post
Heyyy,this cant be right!

The spur adapter got loose from spur gear and then the spur gear started to wobble as far as the diff plates allowed it to move. -and pinion grinded the spur a bit...

(Using 86t 64p kinbrough spur and 12 balls)

-is the tamiya spur gear adapter supposed to be glued in the spur? or how it is supposed to stick there, the stock spur bearing cant be used so what am I missing here?

-the car is F104X1 if that matters



And I just installed 21.5 motor, is 86/31 ok to start? (2.77 fdr)

Any thoughts of what gearing is needed to be same speed as silvercans on stock 3.6 fdr?


-Pate
I would like an answer to this as well. I noticed this when I put my diff together and ended up grinding down the spacer and adding a bearing to try and take up some slop. Maybe shims need to be added but I have no idea which ones.
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Old 05-23-2012, 03:56 PM
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Originally Posted by fastvee View Post
Heyyy,this cant be right!

The spur adapter got loose from spur gear and then the spur gear started to wobble as far as the diff plates allowed it to move. -and pinion grinded the spur a bit...

(Using 86t 64p kinbrough spur and 12 balls)

-is the tamiya spur gear adapter supposed to be glued in the spur? or how it is supposed to stick there, the stock spur bearing cant be used so what am I missing here?

-the car is F104X1 if that matters



And I just installed 21.5 motor, is 86/31 ok to start? (2.77 fdr)

Any thoughts of what gearing is needed to be same speed as silvercans on stock 3.6 fdr?


-Pate
I have never seen this happen...did you have at least 1 bearing in there?
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Old 05-23-2012, 04:09 PM
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robk

for my setup i have the spacer then one bearing inside the diff, then i have the thrust bearing on the outside with the to cone washers and the diff spacer i guess is the last part and no matter how tight i try to get it when I spin the diff you can still see it wobble. I ended up shaving the spacer down thinking the diff rings were not applying enough force to keep it in line. Now I am just thinking that the wring itself might not be straight.
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Old 05-23-2012, 06:23 PM
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Mine has always had a bit of wobble (slop), but it's never caused the car to eat any spurs. I'm running the same setup; 64p kimbrough with 12 diff balls and one bearing inside the diff. No glue on the adapter, just pressure fit.

Is it possible it was a mesh issue?
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Old 05-23-2012, 06:29 PM
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The spur will have a small amount of play, side to side. This is due to the gear floating on the diff balls.
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Old 05-23-2012, 06:39 PM
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I had the adapter slip on a spur gear of mine as well. A spacer of some sort should work fine I just haven't gotten around to it due to switching to the FGX.
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Old 05-23-2012, 11:58 PM
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i use the kimborough spurs and see this wobble also. i wonder weather the recesses or little 'pockets' that the balls sit in,are slightly to tall and effect contact of the diff ring. i know it would make it difficult to place the balls onto the spur but would a thinner pocketed spur help with diff smoothness?
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Old 05-24-2012, 01:32 AM
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Wobble is normal...that is because the diff balls are wider than the spur gear so the spur gear floats on them. If it didn't then the diff rings would be rubbing on the gear and the diff wouldn't work right.
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Old 05-24-2012, 08:48 AM
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Wobble left to right is normal(if looked from back of the car) ,but the adapter slipped out from spur and the spur started to wobble front/back. So that needs sorting,maybe gluing the adapter in the spur.
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Old 05-24-2012, 10:52 AM
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IF any of you are fans of RC F1 you need to make it down to Texas on june 16th!! this is our test race for our upcoming summer series! We have joined forces with UF1 now and expect 30+ entries locally hopefully more if we can get the Austin and Dallas peeps out. Kick ass track and facility, had the nitro TC worlds here two years ago.
http://www.uf1houston.com/index.php?...eries-race-r31
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Old 05-24-2012, 11:16 AM
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I glued the adapter in place. Tested the X1 for first time. BIG crash. enjoy

+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.

The carbon reinforced parts are not that strong...

Thanks to BP SHADOW for the decals.

-Pate
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Old 05-24-2012, 06:05 PM
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if your running with small diff balls it will burn out the spur gear
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Old 05-24-2012, 06:18 PM
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Originally Posted by MantisWorx View Post
IF any of you are fans of RC F1 you need to make it down to Texas on june 16th!! this is our test race for our upcoming summer series! We have joined forces with UF1 now and expect 30+ entries locally hopefully more if we can get the Austin and Dallas peeps out. Kick ass track and facility, had the nitro TC worlds here two years ago.
http://www.uf1houston.com/index.php?...eries-race-r31
Dallas posse will be there
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Old 05-24-2012, 06:18 PM
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Originally Posted by dfiantii View Post
robk

for my setup i have the spacer then one bearing inside the diff, then i have the thrust bearing on the outside with the to cone washers and the diff spacer i guess is the last part and no matter how tight i try to get it when I spin the diff you can still see it wobble. I ended up shaving the spacer down thinking the diff rings were not applying enough force to keep it in line. Now I am just thinking that the wring itself might not be straight.
Like the other guys said the diff gear will wobble. Basically the spacer is going out of the spur and migrating toward the bearing...weird. Most of the spacer I have are pretty tight on the spur, does your slide in and out easily?

The other alternative is glueing it like these other guys did. Maybe just a couple dots, though, so you can try to re use it.
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