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1Back to top Go down    Gluing a bearing in place on Thu Mar 10, 2016 10:08 pm

Kyle10

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I am about to glue a bearing race in place in order to prevent it from spinning. What is the best way to prep the metal for the epoxy? From what I've read I am not only supposed to clean it but abrade it slightly. I'm not too keen on doing this unless it's absolutely necessary.
I'm using Loctite 272. 
Gluing the output shaft bearing in place, as per recommended.


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1985 K100rt 0052183
1983 Honda VF750 007713 
    

2Back to top Go down    Re: Gluing a bearing in place on Fri Mar 11, 2016 7:00 am

Dai

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Which bearing?


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'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

3Back to top Go down    Re: Gluing a bearing in place on Fri Mar 11, 2016 10:32 am

Point-Seven-five

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Is that Loctite 272 recommended for locking bearings?  You mention epoxy, but I think Loctite has a specific product for locking bearings against spinning.

As far as roughing up the surface, a light scuff with 320 grit should be enough.  I would tape up the bearing to make sure none of the abrasive gets in it.


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Present:
1994 K75RT
1994 K75S
1992 K100RS

Past:
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

4Back to top Go down    Re: Gluing a bearing in place on Fri Mar 11, 2016 1:22 pm

Kyle10

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I'm converting a 6-rivet to a later 12-rivet output shaft. The latter has this bearing cast with a "shoulder", whereas the earlier bearings (like this one) feature a circlip to mitigate movement. 

Since the shouldered bearing cannot be fitted onto an earlier engine block, Clymer (and a BMW bulletin of yore) recommends that this bearing be glued into place to prevent possible spinning and fore/aft movement. 


I hate to admit it but it kinda looks like this bearing has done some slipping/spinning. Anyhoo, here's my situation: two smooth, machined metal surfaces on which 'glue' must find purchase. 
I chose Loctite 272 - after poring over forums and adhesive sites - for its anaerobic, heat and strength capabilities.


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1985 K100rt 0052183
1983 Honda VF750 007713 
    

5Back to top Go down    Bearing fix on Fri Mar 11, 2016 4:30 pm

smoll1


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Hi

I emailed loctite when I rebuilt my engine and output shaft. The original number loctite can't remember the number was no longer made.

They said I should use loctite 641 bearing fix.

I used it and have had no problems.

Hope this helps

    

6Back to top Go down    Re: Gluing a bearing in place on Fri Mar 11, 2016 6:27 pm

Kyle10

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It does help, smoll1, and thank you. But looking at the specs its rated to 300F / 149C. Is that a safe range? 



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1985 K100rt 0052183
1983 Honda VF750 007713 
    

7Back to top Go down    Re: Gluing a bearing in place on Fri Mar 11, 2016 8:49 pm

Holister

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Locktite 272 is a threadlocker. You need a retaining compound. There are 2 types, 'press fit' and 'slip fit' with high temp and oil resistant products.

As far as preparation, have a read of these.

The “WHEN, WHERE & HOW” to Use Loctite ® Maintenance Products

Locktite Epoxy Application Guide


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1988 K100RT     VIN No.  0094680
1989 K100RT     VIN No.  0097367 (naked)  
1996 K1100RS   VIN No.  0451808
     Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

8Back to top Go down    Re: Gluing a bearing in place on Fri Mar 11, 2016 9:12 pm

Kyle10

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Kapt, thank you. Illuminating reading, to say the least.

Looks like smoll1 is right; 641 is the business. Point Seven-Five is right as well; a light scuffing w/a mild abrasive, followed by cleaner/degreaser. 

Cool. Thanks, all.


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1985 K100rt 0052183
1983 Honda VF750 007713 
    

9Back to top Go down    Re: Gluing a bearing in place on Fri Mar 11, 2016 10:46 pm

RicK G

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Once you have roughed up the surface clean it with acetone. Loctite recommend MEK but I dont like using it, not very nice stuff to be around.


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

10Back to top Go down    Re: Gluing a bearing in place on Fri Mar 11, 2016 11:08 pm

Kyle10

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 Thanks Rick. Will do. Heluva lot cheaper and on my shelf already.


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1985 K100rt 0052183
1983 Honda VF750 007713 
    

11Back to top Go down    Bearing fix on Sat Mar 12, 2016 5:53 am

smoll1


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I thought about temperatures too. I confirmed this with loctite twice as was not sure and they confirmed it was OK. Seems ok. I also changed to 12 rivet output shaft. I noticed old one had been spinning too. This why contacted loctite as no damage had been done but suppose could of if it continued Very Happy

    

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