Re: What's the trick to removing the inner bearing chase/cup from the rotor?

I use a brass drift and hammer. I slowly tap the edge of the race around and around until it pops out.
Same thing to get the new one in. Make sure it's centered and slowly tap its edge with the drift until it's seated. May not be the preferred method to get them it, but it works for me.

 

Re: What's the trick to removing the inner bearing chase/cup from the rotor?

They sell a dual "leg" thing that is made so that it can fit on both sides so that you can tap it out!!

Kinda like a straight-legged STRONG caliper deal is all.

pdq67

 

Re: What's the trick to removing the inner bearing chase/cup from the rotor?

I use a brass drift as well, works fine as long as you're slow and careful.

 

Re: What's the trick to removing the inner bearing race/cup from the rotor?

I use a large steel punch and a BFH. Make sure to dress the tip of the punch with a grinder to clean it up before you start. Steel gives you a nice “feel” and won’t hurt the hard race as long as you are careful.

 

Re: What's the trick to removing the inner bearing race/cup from the rotor?

If you own a mig welder lay down a bead and when it cools presto out she pops. Might need little coaxing still with drift.

 

Re: What's the trick to removing the inner bearing race/cup from the rotor?

At work we press in hundreds of bearing cups mostly Timken , and we use an arbor press , I know they are not common in the home shop but its important to feel what you are doing to a bearing and I have shattered them before with a punch . You wouldn't believe the sound of the shrapnel whizzing past your ear its impressive. We many times warm up the housing in an oven ( your wifes oven will work ) to enlarge the fit a couple of thousandths then drop in the cup and sometimes tap them in lightly but always with something soft usually brass and only when we cant press them in. I guess what I'm saying is to be careful with these as they can be damaged and can be dangerous when they shatter. Safety glasses are always a good idea when doing this.

 

Re: What's the trick to removing the inner bearing race/cup from the rotor?

I'll be fine with getting them in... I just need to know how to get the inner race out without scoring the inside of my rotor... i was able to get the outter one out with a large socket.

 

Re: What's the trick to removing the inner bearing race/cup from the rotor?

There are 2 notches inside the hub, 180˚ apart, in each race seat. The purpose of the notches is to get a punch on the race to drive them out. Alternate your hits on these two spots until the race comes out.

 

Re: What's the trick to removing the inner bearing race/cup from the rotor?

That's where the two-legged driver comes into play here.

You put a leg in each slot and gently whack away and both sides hit equally so it pops out w/o cocking like doing it side to side.

pdq67

 

Re: What's the trick to removing the inner bearing race/cup from the rotor?

the cheap bearing races installed.

Who's the manufacturer?

There's some good advice here, especially the steel punch recommendation. Brass and/or aluminum punches will flake and possibly contaminate the new bearings. This goes for installations as well. An unhardened steel rod will not damage a bearing ring. Take your time removing the old race. A little bit at a time on each side and the removal will go fine.

Do not use an old race to install the new one. The races are hardened and can cause serious damage not only to your precious parts but to your more precious self.

The easiest and fastest way to install the new races is to use a press. However, heating the rotor is also very effective. Heat it in an oven to 250*F (no torches) and the new race should drop in. Let the to-be-installed race set in a cool place before installation. Do not let it set in the sun to warm up and expand.

 

Re: What's the trick to removing the inner bearing race/cup from the rotor?

Using a press will always be the prefered method. Sometimes a press isn't possible. I can tell you on a manufacturing side its common to use a bearing heater on one part and cooling the other so you get a slip fit that will become a press fit once both pieces reach the same tempature.

At home an oven and freezer work surprisingly well.

 

Re: What's the trick to removing the inner bearing race/cup from the rotor?

the cheap bearings are in a PTC box and have
"CHINA LM67048 QJZ" on the inner bearing and
"CHINA LM67010 QJZ" on the inner race

I went to autozone to see if they had a removal tool, but they only have an installation tool set.
It is aluminum and will make full contact with the bearings. I just rented it, and I'll use the oven method, or just bring them to work and press them using the install tool instead to hammering them.

 

Re: What's the trick to removing the inner bearing race/cup from the rotor?

If you can not get on the back of the race, i simply lay a Tig bead on the race and when it cools it contracts and falls out. This is also how i get valve seats out of aluminum heads.
I have in the past used the old race to install the new race, i simply grind the OD of the old race down slightly on the cut off saw, it allways works for me. Bearing and seal driver sets never seem to have just quite the rite size arbors.
Hope this helps.

 

Re: What's the trick to removing the inner bearing race/cup from the rotor?

OK, the inners are out... I took them to work and used a steel punch and brass hammer combo. However it looks like I have to reseat the lug bolts cause some are slightly angled, I'm assuming from me hammering out the outer races last week. Opps...