Center bore- boring out

[oxymoron]

just wondering how much a place may charge for this, since im rocking weaves right now, theres a set of mini wheels at my work one has a crack that can be fixed. and from what i understand the center bore is too small for the e30. so i was wondering if its worth trying to run them? what do you guys think

[E30SPDFRK]

Usually about $20 a wheel. Be sure to go to a good shop though, because if they fuck it up the wheels will shake like crazy.

[oxymoron]

these are the wheels and thats the crack. would you guys run these or are they gay ? ha 17x7

[bcusitsjeff]

i think they would look decent...

they kind of remind me of the old watanabes, and they look pretty cool on e30s

[E30RedtopSR]

as someone who investigated this option, consulting a large machine shop, its a ton of work to set up and the likelihood of scratching the wheels is good.
I have Prorace wheels for a mini and just machined the spacers instead.

[AndrewBird]

as someone who investigated this option, consulting a large machine shop, its a ton of work to set up and the likelihood of scratching the wheels is good.
I have Prorace wheels for a mini and just machined the spacers instead.

Not true. I work at a machine shop and the process would be simple. Clamp the wheel to the mill, sweep in the center with an indicator, then bore it larger. You would have to sweep in every one separately, but that only takes a few minutes. And as long as you are careful, you should scratch the wheels.

[george graves]

Do you use some kind of probe for "sweeping" to find the center?

[E30RedtopSR]

Not true. I work at a machine shop and the process would be simple. Clamp the wheel to the mill, sweep in the center with an indicator, then bore it larger. You would have to sweep in every one separately, but that only takes a few minutes. And as long as you are careful, you should scratch the wheels.

how would clamp it without marring the edge? if you put something between the wheel and jaw to protect it you'll never center it. in theory its simple. you can give er a shot on some 1000 dollar wheels and get back to us.

Id try it out on some shit mini wheels for sure.

[jlevie]

When you do this on a mill the clamps will register on the inner lip where the tire bead sits. Even if you were to scratch it there (unlikely) you'd never see the scratches.

[mikeedler]

I just paid 50 dollars a wheel over here in Germany a few weeks ago. everything here is expensive though. no scratches either.


I would not run FWD high offset 7" wide wheels with a crack on an e30 personally though.

[LJ851]

Do you use some kind of probe for "sweeping" to find the center?

George, google "test indicator". It is a very accurate dial indicator with a spring loaded tip that can be mounted on the spindle of a mill. With the indicator tip loaded against a bore , the spindle can be rotated to verify wether the spindle and the bore are concentric.

[E30RedtopSR]

When you do this on a mill the clamps will register on the inner lip where the tire bead sits. Even if you were to scratch it there (unlikely) you'd never see the scratches.

Hmm.so it will compensate for runout in the bead area.
Just curious.
I will tell my 40 year veteran machinist mill wright. he would be interested to hear

[E30SPDFRK]

I brought my set of 18" style 5s to get bored out and the machinist was having trouble clamping the wheel lip securely. When he went to make fine adjustments, the lip would just flex rather than moving the way he wanted. I ended up having to take it apart and give him the centers.

[oxymoron]

i just bought tires for my basket weaves. direzza z1's im pretty happy i didnt bother with those wheels, thanks for the input fellers

[ForcedFirebird]

Do you use some kind of probe for "sweeping" to find the center?

Not true. I work at a machine shop and the process would be simple. Clamp the wheel to the mill, sweep in the center with an indicator, then bore it larger. You would have to sweep in every one separately, but that only takes a few minutes. And as long as you are careful, you should scratch the wheels.

George, google "test indicator". It is a very accurate dial indicator with a spring loaded tip that can be mounted on the spindle of a mill. With the indicator tip loaded against a bore , the spindle can be rotated to verify wether the spindle and the bore are concentric.

It's technical name is dial test indicator and this is a very accurate way to find center.

If I was to machine a wheel, I would use a t-bolt and hold-down on the lip of the wheel to avoid scratching the face, dial them in (we always say trim it in in our shop) to find center, wire a quick program and make it undersized the first cuts and trim it more to size in case of any tool deflection.