• We are no longer supporting TapaTalk as a mobile app for our sites. The TapaTalk App has many issues with speed on our server as well as security holes that leave us vulnerable to attacks and spammers.

Stub shaft


Turboflash said:
Haven't heard of failures at all since 2017. Although I admit I have regreased mine.
Click to expand...
Have you opened it up? It's like a heavy waxed based grease. Looks more like candle wax. Besides, mines was full at the time. I'm guessing 10k or more of grease life expectancy. Probably should have used it elsewhere on the sled. Lol.
 
jtmetal said:
Have you opened it up? It's like a heavy waxed based grease. Looks more like candle wax. Besides, mines was full at the time. I'm guessing 10k or more of grease life expectancy. Probably should have used it elsewhere on the sled. Lol.
Click to expand...
Yes, hi temp, hi rpm grease. Bearing is turning 9000 rpm.
 
Turboflash said:
I'll see if I can find it in my notes. Believe it was Aeroshell #7 airplane grease. Temp range -99 degF to +300 F. I'll confirm.
Click to expand...
Turboflash, question....if you hold the housing with one hand and move the shaft side to side with other hand, should there be a slight amount of clearance/tolerance felt?
 
Only possible movement that would be felt would be in the bearing itself. Can’t imagine there should be but god knows .
 
NYTurbo said:
Only possible movement that would be felt would be in the bearing itself. Can’t imagine there should be but god knows .
Click to expand...
Yep...that's exactly what it feels like. Brg & cage itself. It's not horrible, but definitely noticeable. I've never even thought to play with it, as I sit here and wait for knockoff.
Hmmm....9,000rpm & this little wobble. Lol. Maybe some I will pipe in, as I have no way to measure run out, or what's acceptable.
 
NYTurbo, the feedback I'm getting is that it's okay. So I'm assuming, once it's sitting on its axis, it's good to go.
 
jtmetal said:
Turboflash, question....if you hold the housing with one hand and move the shaft side to side with other hand, should there be a slight amount of clearance/tolerance felt?
Click to expand...
Yes. You're feeling internal clearance in bearing. It's a C3 fit.
 
jtmetal said:
Yep...that's exactly what it feels like. Brg & cage itself. It's not horrible, but definitely noticeable. I've never even thought to play with it, as I sit here and wait for knockoff.
Hmmm....9,000rpm & this little wobble. Lol. Maybe some I will pipe in, as I have no way to measure run out, or what's acceptable.
Click to expand...
Believe me - as bearing runs it heats up and the balls get bigger in diameter. Both races also "grow" due to thermal expansion. Gotta remember this bearing gets heat from crank/crankcase, and primary clutch. When you're out riding this bearing is turning what, 5-9000 RPM? Once it's at operating temp, there wouldn't be any "wobble" in primary clutch or stub shaft. Well, maybe technically there might a few millionths.
 
I don't like the thought of putting something broken back in. Haha...
Thanks for the explanation!
 
Ok, for the members who have installed the knockout kit, tell me the coolant temp you ran the motor to B4 shutting off the sled?
Note: just asking...
 
Last edited:
You must log in or register to reply here.

Similar threads

rb2001srx700
Stub shaft measurements.
Replies
6
Views
2K
rb2001srx700
rb2001srx700
2
Stub Shaft Seal
2
Replies
19
Views
2K
twyztid
twyztid
F
Clearing the air on stub shaft bearing
Replies
4
Views
2K
74Nitro
74Nitro
S
BOP bearing upgrade observations
2
Replies
15
Views
4K
canine170
canine170
kinger
  • Sticky
MASTER Sidewinder issues list and known fixes
2
Replies
21
Views
36K
stgdz
S


Back
Top