I took my h2's to a machine shop, granted it didnt look the best, but seemed like they would do good work. They ended up cutting out 4.776 instead of 4.774?? I was reading off of Hookies instructions that when powdercoating, to go a little bigger? Now Im powdercoating, but I also read off of Hookies site that these wheels are hubcentric, and if the hole is too big it will put too much pressure on the lugs? What do yall think, are they still ok? Oh and otherwise the work looked good!

 

They are Lugcentric and you will be fine. I did mine myself with no issues...

 

You're talking about two thousandths of an inch. That's thinner than a sheet of paper.

 

That is only .002 on the dia. .001 on each side of the hub. Its hard to machine 4.776 right on the dot. Unless they take a long time and your bill will sky rocket. Usually a machine shop can hold within .005 with out a problem. You'll be fine. Post pics.

 

Mine were intentionally machined this way in order to make the wheels easier to get off the rear hubs, especially if the aluminum decides to corrode a bit.

I have no balance issues.

 

If they can't hold 0.0005", they aren't a machine shop.

Rusty

 

I will agree that any machine shop can at least hold 5 thou (.005) but 5 hundreths of a thou (.0005) is better left to a swissmatic shop or the like. Most heavy machine shops will not be able to hold .0005.

 

We manufacture engines up to 20" bore x 20" stroke and compressor cylinders up to 42" diameter. 0.0005" cylinder bore taper or crankshaft journal taper and 0.001" bore diametrical tolerances are typical.

Would you take a small block Chevy block to a machine shop to be bored 0.030" over and give them +/- 0.005" tolerance on the bore, meaning anything between 0.025" over and 0.035" over is acceptable? How about 0.005" tolerance on a main bearing bore or a connecting rod big end?

By the way, 0.0005" is half a thousandth.

Rusty

 

I picked mine up from the machinist a couple days ago. I had them go up to 4.778" to allow some room for powdercoat and whatever else.

On a side, this morning I dropped them off at the powdercoater...should be done in a week or two. Now I need to decide on tires. I really want a 35" all-terrain but only with an E-rating, if one exists. 14,000 lbs of 5th wheel will put quite a load on those tires...

 

Sure you can have them hold .0005" and I would be willing to do it on the machinery at my house. I just don't think you want to pay for .0005 when .002 or .003 will work. Most smaller shops can even have difficulty measuring a 4+" bore accurately enough to hold .0005. I think you will be fine and probably better off in the long run going a couple bigger.

 

Dough, I wasn't paying attention. You are correct. A half a thou. I agree with what you are saying.

 

Any competent machininst should be able to hold that tolerance on metal easy. even with wacked out machinery that they know. long as you have good calibrated instruments... now when i worked in a machine shop we machined fiberglass , plastics, and other man made materials. we made bushings, insulators, cutting tables, to all sorts of things. now trying to hold .001 + or - on a piece of plastic is hard. As you machine some of that stuff it can deflect and can also expand from the heat. Clamping become a very important thing and wasted, sacraficial parts are the norm. very often we were given a liberal +/- .015. Course sometimes more sometimes less. But yeah metal is easy if the machinist just takes their time.
Your wheels will be fine. i machined out the bore on my rotors for my jeep and warn had a good size tolerance on those specs....

 

Dumb question, but what part of the wheel is being machined???? Been looking at putting a chrome set on my 06

 

The big hole in the center where the wheel slips over the hub. It needs to be enlarged a bit to fit over the Dodge hub.

 

With all this talk about machine shop competency and what-not, I think the original post was lost! Dodgezilla is right... the Dodges are LUGcentric, so no worries about the hole being too big. Heck, a lot of guys use a hole saw. You think they are getting within even a hundreth of an inch accuracy? Doubt it.