Bore bit

[Fluelikesymptoms]

I have a bearing that I want to bore out the inner race by a few thousandths of an inch. I dont have a die grinder and I'd prefer not to spend a couple hundred buying one right now. However if I absolutely had to I would want to only buy it once.

Anyways as title says, I'm looking for the best bit to accomplish this in my fuel hammer drill, in my head I'm picturing a cone like shaped bit. Because of how hot my drill can get I'd prefer to have a good bit to get it bored as quickly as possible without causing third degree burns.

Anyone know of a good bit I can use with my drill to accomplish this, my chuck is 1/2. I just need to fractionally increase the diameter of the race, it doesnt have to be perfect as it's just going to be a dummy bearing.

You can probably tell I'm not a machinist so I dont have a drill press either

 

[rsanter]

Bearings are hard you won’t be able to drill or bore it and have something usable at the end.

Do,you mean a bushing? If so what size and your best bet is to use a reamer

 

[Fluelikesymptoms]

Bearings are hard you won’t be able to drill or bore it and have something usable at the end.

Do,you mean a bushing? If so what size and your best bet is to use a reamer

I'm not looking for the bearing to be usable I want to create it into a dummy bearing that slides on and off easy instead of pressing it a bunch of times. It isnt actually going to serve a real function

 

[pstemari]

If what you need isn't a bearing, but a bushing/collar for use as an assembly tool, there's many easier solutions than modifying a ball or roller bearing.

Have any friends with a lathe?

 

[Fluelikesymptoms]

I dont have know any body with a lathe but might be able to get access to one from my job or previous job. What I need specifically is a dummy bearing to fit onto a pinion easily so I dont have to press it on and off a hundred times adjusting pinion depth and backlash on the spider gears. Once I get pinion depth backlash and pre load configured tinkering around with it I am going to remove it and press on a good bearing.

 

[whyNick?]

try a cylinder hone

 

[bugnut]

whynick is spot on, the bearing is very hard so a hone of the correct size will work,

Lisle-10500-Brake-Cylinder-Hone

 

[crewchief888]

flap wheel with your drill.

 

[Fluelikesymptoms]

flap wheel with your drill.

This is what I was thinking my original thought was a cylinder hone but I was thinking that would take years to bore out a bearing, like others mentioned bearing races are really tough. I went from cylinder hone, to flap wheel, and now I'm thinking a carbide burr on a die grinder. But that puts me spending yet another 200+ dollars on this project but ut6 also gives me the excuse I've been needing to all8w myself to do it

Does anyone know of any carbide burrs for drills?

I might give the wheel flap and a cylinder hone a try, as I feel like I have more control on final sizing this way but it might take forever. I would probably get better specs if the bearings didnt have a bunch of play

 

[Riggerson]

you'll never make a decent hole with a carbide burr. A few thousandths is nothing with a hone.

I re-read your post. If you just want a bearing shaped object just buy a standard carbide burr or a stone and go to town. It will work in your drill.

 

[Toold_up]

Flap disk will probably be the easiest. A little more elaborate would be a dummy machined from some material. You could probably get a local machine shop to machine you one up real quick if you supply the bearing and tell them what you are trying to do.

The bearing is going to want to spin when you attempt to bore it larger. A broach would work too, but again the flap disk would be cheaper and easier. There is more than one way to do it.

 

[unslow1]

try a cylinder hone

That's what I have seen guys use when making assembly bearings to test fit for clearances. It seems to do it quick and easy.

 

[ttpete]

Take it to an automotive machine shop that has a Sunnen honing machine and have them hone the bore to the pinion shaft diameter plus .002".

 

[engineer2]

Is this for setting up a differential pinion?
You can use a cylinder hone and plenty of lube, but you will likely sacrifice the stones because of the hardness of the bearing.

 

[ChevyEFI]

Brake cylinder hone x 3.

I have used one to slowly expand the i.d. of a small tapered roller bearing inner race.

 

[toplessHO]

I see where you re going with this
If only doing this once,buy two identical bearings,one to hone and use for test /mock up,the other as the bearing youll be using.
If doing this dance many times buy several identical bearings at once.
Production variances may throw you a curve.

 

[Indexmill]

Trying to increase the size of the bore in a ball or roller bearing for any reason is crazy talk. It's just not done. Reduce the diameter of whatever you want the bearing to go on...

 

[pi_guy]

Trying to increase the size of the bore in a ball or roller bearing for any reason is crazy talk. It's just not done. Reduce the diameter of whatever you want the bearing to go on...

Not if you want to make setup bearing.

 

[readhead]

I made lots of setup bearings when I was doing differential work. I used a die grinder and a carbide burr. It only takes a few minutes.

 

[CR888]

1/8" mandrel and sanding drum. Got a dremel?

 

[Fluelikesymptoms]

Thanks for the replies guys I am going to try a flap and then and cylinder bore, if neither of those work goos, which I'm sure on will I'll hack it up with a carbide burr.

All fails off to the machine shop