This post has nothing to do with Photography, But it's in General Chit-Chat
May 16, 2021 12:32:41 #
steve82009
Loc: Cheyenne, WY/Cochise, AZ
Swap out the entire pulley. Lots less work and probably not much more expensive than a new bearing.
May 16, 2021 12:34:25 #
I'm a retired mechanical guy and I've pulled a countless number of bearings that are press-fit so perhaps one of this tactic may help:
IF...you have access to the back side, take a piece of 1/2" thread rod about two foot long. Slide a 6-inch 3/4" pipe nipple over it. Put a washer larger than the center hub of the bearing on the back side and put a nut on it. Place a large washer and nut on the top end.
What you have just made is what is referred to in the autobody business as a "Dent Puller". Slam the pipe nipple against the top washer and the impact will nudge the bearing out of its pressed fit.
IF...you have access to the back side, take a piece of 1/2" thread rod about two foot long. Slide a 6-inch 3/4" pipe nipple over it. Put a washer larger than the center hub of the bearing on the back side and put a nut on it. Place a large washer and nut on the top end.
What you have just made is what is referred to in the autobody business as a "Dent Puller". Slam the pipe nipple against the top washer and the impact will nudge the bearing out of its pressed fit.
May 16, 2021 12:36:58 #
Method Two...if you can't get to the back side of the bearing....bend the 1/2" rod in hook so that you can insert it into the bearing and use the same impact method. Move the "hook" around from slam to slam so that the bearing pulls out evenly. Again, it is an impact puller.
May 16, 2021 13:18:48 #
May 16, 2021 13:21:57 #
Since you have experience with pullers, you would simply use a hacksaw with an appropriate blade and cut through the darn thing. If that doesn’t release it, then make another cut and remove a segment of the bearing.
May 16, 2021 13:43:53 #
Doc Barry wrote:
Since you have experience with pullers, you would simply use a hacksaw with an appropriate blade and cut through the darn thing. If that doesn’t release it, then make another cut and remove a segment of the bearing.
Really ? cut a bewaring with a hacksaw?
Besides there is no room for a hacksaw blade!!!
May 16, 2021 13:53:57 #
Diamond blade. Flip the blade and mount blade after inserting it through the bearing. Saber saw a possibility too.
May 16, 2021 15:07:15 #
Heat around the alum with a propane torch. Alum expands at about 1/8" per foot and the steel at 3/32: per foot. It should be enough difference to manage to free the bearing. Other than that try a dremel tool with a cut off wheels and work at cutting the bearing races enough to pry the balls out then the center would be free and you can finish the outer race with the cutoff wheel. It will be a large pain.
May 16, 2021 15:49:01 #
May 16, 2021 16:20:41 #
May 16, 2021 17:09:34 #
Doc Barry wrote:
Diamond blade. Flip the blade and mount blade after inserting it through the bearing. Saber saw a possibility too.
Please read all of the original post:
The hole don't go all the way through!!!
May 16, 2021 17:11:21 #
wasatch wrote:
There are things called bearing pullers.
Which I own many that I know how to use !!!
And did use This morning.
May 16, 2021 17:12:18 #
May 16, 2021 17:34:01 #
May 16, 2021 17:43:26 #
Manglesphoto wrote:
How would you go about getting the bearing out of ... (show quote)
As a last resort, there are pullers that you insert into the ball bearing cavity, between the inner and outer races.
This would of course require removal of some of the cage at the appropriate (2 or 3) places which in itself is a bit of a mission.
The puller legs are turned through 90 degrees after insertion, which allows their heads to engage both the inner and outer races in the grooves where the balls run. At this point (I would place the whole assembly into a heated oil bath first) the bearing can then be 'pulled' out via jacking screws working against the outer (or inner) casing.
Suggest you talk to a bearing supplier to learn more, or better still, employ the services of an engineering co. who has this equipment. Doubt many will though.
Good luck!
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