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Blind Hole Bearing/race Removal


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#1 8tyman8 OFFLINE  

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Posted March 16, 2013 - 08:04 PM

So Today i am going to show you how i remove a bearing that's in a blind hole.

This is the rim and tire of my 100+kph mini bike (60 mph) the bike has performed well (its had 4 engines so far now it has a model 19 briggs) lets just say that the bearings are Done they were so bad the inner race fell out.

what you need

Die grinder/rotary tool

Screw driver

hammer

Punch

Round rod

First try to punch the bearing out from the back side (if possible)

 

Second try to pull the bearing out with a chunk of round stock the same size as the Id of the bearing (will only work if you have a some way to attach the rod the the center and you need to weld it to the bearing you may also need to attach a pair of vice grips to the rod then hit it from the back side with a hammer )

 

third the  use die grinder with a small stone to grind the side of the outer race down but not grind into the side of the Case/part.. you need to grind till there is a Witness mark and the base metal shows thru once you get to that point All the stress if off the bearing it will almost fall out... but i used a screw driver to pry it out clean the bore up and install new bearing (inner race and bearings need to be out for this to work)

Hope this helps any one

Cheers

Tyler

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#2 KC9KAS OFFLINE  

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Posted March 16, 2013 - 08:17 PM

Harbor Freight....Blind Hole Bearing Removal Tool.

image_14671.jpg


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#3 KC9KAS OFFLINE  

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Posted March 16, 2013 - 08:23 PM

Another (home-made) method of bearing removal:

 


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#4 ol' stonebreaker OFFLINE  

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Posted March 16, 2013 - 09:24 PM

  In the case of only the outer race left, Stuff a water soaked rag down in the tube, Run a bead if 6011 rod around the inside of the race, let it cool and it will fall out. It doesn't have to be a heavy bead either.

                                                Mike


Edited by ol' stonebreaker, March 16, 2013 - 09:24 PM.

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#5 Fabman OFFLINE  

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Posted March 16, 2013 - 09:43 PM

  In the case of only the outer race left, Stuff a water soaked rag down in the tube, Run a bead if 6011 rod around the inside of the race, let it cool and it will fall out. It doesn't have to be a heavy bead either.

                                                Mike

Ya took the words right out of my mouth. I'v made small slide hammers to assist also.



#6 JDBrian OFFLINE  

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Posted March 17, 2013 - 06:11 AM

  In the case of only the outer race left, Stuff a water soaked rag down in the tube, Run a bead if 6011 rod around the inside of the race, let it cool and it will fall out. It doesn't have to be a heavy bead either.

                                                Mike

 

Mike, what exactly is happening when you put a bead of weld on that race? Is it the heating and cooling cycle that breaks the bond? 



#7 Michiganmobileman OFFLINE  

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Posted March 17, 2013 - 06:33 AM

Thanks for the original post and your method 8tyman8, your rotary tool looks just like mine, dont need it all the time but its nice to have it on standby when you do.  And thanks too to the rest of you guys for your input, lots of good ideas, I had never thought of using an masonry anchor for something like that. Man I love this site, its always something new    :worship:    :thank_you:

 

:thumbs:  :thumbs:  :thumbs:  :thumbs:  :thumbs:  :thumbs: :thumbs:  :thumbs: (two thumbs up each) 



#8 ol' stonebreaker OFFLINE  

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Posted March 17, 2013 - 07:23 AM

Mike, what exactly is happening when you put a bead of weld on that race? Is it the heating and cooling cycle that breaks the bond? 

 

   As the weld cools it shinks the OD of the race. This is why when a crack is welded the parent metal,over time, cracks again next to the weld. This is called the HAZ(heat affected zone) which is under a lot of tension due to the weld shrinkage. This can be relieved by peening the weld w/ an air chipping hammer using a pointed bit.

                                                            Mike


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#9 HowardsMF155 OFFLINE  

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Posted March 17, 2013 - 08:37 AM

Harbor Freight....Blind Hole Bearing Removal Tool.

image_14671.jpg

In my area, tools like this are available for "rent" from several of the local auto parts stores.  You pay full price for the tool, then get full credit when you return the tool.  Its really handy.



#10 KC9KAS OFFLINE  

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Posted March 17, 2013 - 02:13 PM

I know an auto parts store that will LOAN you the speciality tools if you buy the part from them.

The counter guy told me he has never had a problem with anyone not returning the tools.






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