Bearing shield for SiSl2 PF30 & 109mm spindle install tips

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rug
Posts: 1
Joined: Fri Oct 24, 2014 12:22 pm

by rug

Hi! :wink:

Long time lurker, after some advice.

I just bought some new Cannondale Sisl2 cranks and a Wheels MFG PF30 BB. This BB has a squishy-silicone bearing shield pre-installed. Should I be using this bearing shield or the original Cannondale bearing shields? The Cannondale bearing shields have a slightly smaller outer diameter (since they are for BB30), leaving more of a gap for dirt to get in. Images of each are below.

Also, is it OK if I use a super-fine grit sandpaper to sand down the 109mm spindle to aid installation? The bearing/spindle interface is extremely tight. My Campy Over-Torque PF30/spindle interface has a decent amount of play and they worked flawlessly.

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by Weenie


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xuberone
Posts: 7
Joined: Wed Aug 20, 2014 4:28 am

by xuberone

Hi, I have the exact same crank as you but used tripeak pf30 cups instead. What my mechanic/friend did for me was that he used cannondale's bearing shield and some lub to work the crank in. He did not sand the spindle down and was able to knock it in with a mallet (not sure if I am correct). I guess the bearing shield is of no consequence as I did ask him the same question as you.

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prebsy
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Location: there or thereabouts

by prebsy

Destructive methods should be an absolute last resort.....don't sand you spindle.

goodboyr
Posts: 1487
Joined: Wed Jan 10, 2007 10:56 pm
Location: Canada

by goodboyr

Hold a can of compressed air upside down and spray into hollow shaft. It will rapidly cool down shaft and shrink it enough to allow an easy slide in and out.

spud
Posts: 1266
Joined: Sat Feb 07, 2009 5:52 am

by spud

grease the spindle, put it in the freezer for 20 minutes. Then tap it in with a mallet, should not require too hard of a hit.

regarding the seals, don't have any experience with them but would probably use the squishy seals.

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shoemakerpom2010
Posts: 296
Joined: Mon Apr 11, 2011 6:28 pm
Location: Palm Coast, Fl.

by shoemakerpom2010

goodboyr wrote:Hold a can of compressed air upside down and spray into hollow shaft. It will rapidly cool down shaft and shrink it enough to allow an easy slide in and out.


Used this method numerous times so far with that spindle and it works very easy. :thumbup:

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ms6073
Posts: 4290
Joined: Fri Jul 23, 2004 8:24 pm
Location: Houston, Texas

by ms6073

I tried compressed air as well as freezing the spindle but neither was really much help as it still displaced the bearing on the opposite side when inserting the spindle not to mention banging on a drift placed against the spider of a Hollowgram SRM with a rubber mallet is simply not an option! I used a Dewalt cordless drill to 'polish' the spindle with water and a very fine grade of emory cloth. After 30-45 seconds, the spindle was nice and smooth and could be inserted in BB30/PF30 bearings by hand with minor effort and no mallet required.
- Michael
"People should stop expecting normal from me... seriously, we all know it's never going to happen"

jpanspac
Posts: 159
Joined: Thu Apr 11, 2013 8:21 pm

by jpanspac

Ms6073,

I would like to sand my spindle down a hair, but my drill chuck doesn't open wide enough to grab the spindle. How did you do it?
My favorite components are the ones I never have to think about.

NiFTY
Posts: 1493
Joined: Sat May 26, 2012 11:26 pm

by NiFTY

I hand sanded my spindle with fine grit sandpaper and water. (SISL, 104mm spindle) People can say what they want about freezing the spindle and tapping it in but when it re-expands it will still load your bearings and cause premature destruction. I sanded mine after my first BB died in 4,000ks. Just go slowly with sanding, be even, and stop as soon as it can be pressed in by hand.
Evo 4.9kg SL3 6.64kg Slice RS 8.89kg viewtopic.php?f=10&t=110579" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

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ms6073
Posts: 4290
Joined: Fri Jul 23, 2004 8:24 pm
Location: Houston, Texas

by ms6073

jpanspac wrote:I would like to sand my spindle down a hair, but my drill chuck doesn't open wide enough to grab the spindle. How did you do it?

I threaded in a spare SiSl crank bolt into the end of the spindle, then using a 1/2-Inch Drive 10mm Hex bit socket, that was snapped onto a 1/4" to 1/2" drive adapter, thus allowing the drill to drive the 10mm crank bolt while polishing the spindle.
- Michael
"People should stop expecting normal from me... seriously, we all know it's never going to happen"

jpanspac
Posts: 159
Joined: Thu Apr 11, 2013 8:21 pm

by jpanspac

Ah, ok. I've been trying to figure out a way to do it upside down with my drill press. I guess I'll do it your way. Thanks.
My favorite components are the ones I never have to think about.

by Weenie


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