Stub shaft bearing

DMCTurbo

DMCTurbo

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Val Caron, Ontario
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Snowmobile
2017 Sidewinder XTX LE 137
Just a heads up for those green loctiting the bearing into the housing. I noticed upon removal of my stub shaft assembly that my shaft moved inwards. The bearing was flush with the housing on the face so everything looked fine visually after removing my primary. Needless to say I won't be locking the bearing down anymore. Other option would be to lock the bearing on the shaft as well but I don't like that option as I feel on a belt blow something has to give and I wouldn't want the full force going thru and possibly cracking a clutch.

20251116_141726.jpg
 
I would try locking both. I think that machining tolerances are at play here and it originally was designed to not move at any point. Clutch was also designed to be on a shaft that doesn't move. Lock them both. The belt is the Safety. We may find in some cases once it slips it will forever be weaker fit due to the movement and assembly and disassembly twice. Might be forced to buy new one. But I would not lock a new one down till a issue shows its ugly head.
 
I quit doing this as it can only move a little anyway. The inner bearing prevents it from moving any further.
 
DMCTurbo said:
Y

Yes but my biggest concern is it throws out your offset and you may not be aware.
Click to expand...
Up to 3/4mm max.
And why worry about that when almost everyone on this site doesn't have their secondary locked except Knapp and myself. Stock secondarys float about 6-8mm.
Do you lock yours?
 
74Nitro said:
Up to 3/4mm max.
And why worry about that when almost everyone on this site doesn't have their secondary locked except Knapp and myself. Stock secondarys float about 6-8mm.
Do you lock yours?
Click to expand...
Yes I run it locked.

I'm not sure what the float has to do with this to be honest. Stub shaft moves in it throws off your offset plain and simple.

That was my whole point of the thread.
 
DMCTurbo said:
Yes I run it locked.

I'm not sure what the float has to do with this to be honest. Stub shaft moves in it throws off your offset plain and simple.

That was my whole point of the thread.
Click to expand...
The secondary is what it's measured from.
 
DMCTurbo said:
You are confusing me. Once you have your offset dialed in and your stubshaft moves in due to a blown belt. Your offset is now out to lunch.
Click to expand...
It's only about .5-.75mm max that it can move.
Again, in stock from the secondary moves far more than that.
 
74Nitro said:
Up to 3/4mm max.
And why worry about that when almost everyone on this site doesn't have their secondary locked except Knapp and myself. Stock secondarys float about 6-8mm.
Do you lock yours?
Click to expand...
Mine is locked down
 
I'd like to see someone make a belt adjuster and changing tool that locks it up from floating.

BOP, or Thunder?
 
DMCTurbo said:
Just a heads up for those green loctiting the bearing into the housing. I noticed upon removal of my stub shaft assembly that my shaft moved inwards. The bearing was flush with the housing on the face so everything looked fine visually after removing my primary. Needless to say I won't be locking the bearing down anymore. Other option would be to lock the bearing on the shaft as well but I don't like that option as I feel on a belt blow something has to give and I wouldn't want the full force going thru and possibly cracking a clutch.

View attachment 179380
Click to expand...


Wow, I never thought the shaft would move in the bearing. when I changed the bearing in my 17, it took a lot of pressure to get it to move, and when it did move the press was about maxed out and what a bang it made when it finally let loose.

When I put it back together I green loctited it all including the shaft. I didn't want it moving at all anywhere.
 
KnappAttack said:
Wow, I never thought the shaft would move in the bearing. when I changed the bearing in my 17, it took a lot of pressure to get it to move, and when it did move the press was about maxed out and what a bang it made when it finally let loose.

When I put it back together I green loctited it all including the shaft. I didn't want it moving at all anywhere.
Click to expand...
Agree. Surprises me too. I've had same experience using my press - took max pressure to get stub to move in bearing.
 
74Nitro said:
Up to 3/4mm max.
And why worry about that when almost everyone on this site doesn't have their secondary locked except Knapp and myself. Stock secondarys float about 6-8mm.
Do you lock yours?
Click to expand...
Mine has been locked since new, no issues
 
Is taking the float out as simple as stopping any side to side play in the secondary as it sets with the machine off and the belt up in normal position?
 
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