Just got my mill working and wanted to know what size exactialy the wholes should be drilled for the 4 extra studs. I know someone has posted on here somewhere, what size to use. But I don't feel like searching through tons of threads to find it. So just a quick bit size and I will be on my way.

I don't have an exact answer for you, but a suggestion on how to determine the right size.

 

Use the shanks of your bits to see which one fits the whole in a suby wheel the best.

Yea I was thinking of that, I just wanted to be careful to get the right one. I could picture getting a flat in the middle of no where and have one lug spinning becaues I used the wrong size bit. I thought that the whole might be bigger from the stud bieng pressed in there. I don't know.

Yes, the hole should be slightly larger than the stud going into it, and the conical lugnut seat (or whatever you use if you don't taper bore the hole) will cover a multitude of sins.

 

But the standard for determining bit size (at least amongst non-pros ) is to slide the bit shank into an example/model hole. This is assuming that you aren't using reduced-shank bits. The proper bit should just barely move through the hole.

He wants lug hole size, not the wheel hole size. I believe the easiest way is to buy the studs and determine the size from them. Yes, I have done this mod. One of the first to do it, actually. And yes, I am too lazy to go out to the garage and check the bit size.

He wants lug hole size, not the wheel hole size...

Doh!!! Yup... Sleep deprivation strikes again. Thanks again, qman.

 

So, if noone gets unlazy , you could press out one of the 2 studs that you need to do anyways, and use that hole as a gauge.

So, if noone gets unlazy , you could press out one of the 2 studs that you need to do anyways, and use that hole as a gauge.

 

I would think this is the way to do it...since they have to come out anyway