Drilling and tapping hubs/discs

[zeroaxe]

Hey people,

Would like to ask some opinions again please. I am considering drilling and tapping my own hubs, as I cant find a place close to me that is willing to do it (there might be this one more shop that might do it, but I am not counting on it). Problem is that I can not find any taps in 14mm diameter. sizes, let alone the right pitch.

Now, the DIY shop close to me has got a kit, these:


They come as a 'start, tap and finish' set. Problem is that they are 12mm diameter only. I would like to go to a 5 stud pattern.

So my thinking is this... If the Super Beetle/Fastback came with 4x14mm lug nuts, would it be a bad thing to go to 5x12mm lug nuts? I would prefer if I can get hold of 'press in studs' but again, to find them here and then to get somone to press them in with a hydraulic press .....?

So, I give the floor to you....:agree:

[ricola]

don't use 12mm nuts unless the wheel was designed for them!

I'd go with press in studs, you can even hammer them in to start wiht and then wind the nut up to pull it in straight..

Rich

[zeroaxe]

Ricola,

Thanks for the tip. Yeah, I wouldnt have used a 12mm stud/lug nut if the hole in the wheel was 14mm for example. Just if I had the option to use 12mm studs/lug nuts, I would've made sure that I had a wheel to suit. But thanks anyway for reminding me.

As you say about the press studs. someone else also said that they dont need to be press fitted. "Just fit them and bolt them down" I was told. I would need to know the hole size(Down to the Micro reading) to make sure the holes arent drilled too big. I would've thought that 13.5mm or so would be the right size?

Thanks for posting.

BTW, fantastic progress that you made/are making on the Phantom!!

[ricola]

Thanks

13.5mm would be way too small, it would take a massive amount of force to press the stud in. A good guess would be to measure the diameter of the bottom of the 'teeth' on the stud and add a bit, it should only be fractions of a mm smaller than the max stud diameter. You should be able to look up press fit tables for exact numbers..

Rich

[zeroaxe]

nice one! I am going to try and get my hands on some studs first before any drilling is going to take place.

[flat]

So, If I understand correctly, you are redrilling stock 4-130 drums/disks to Porsche pattern? There isn't enough meat in the new holes to tap for the 14mm wheel bolts. I spotface the back and then press in the studs. It's the only way I do 'redrills', helps me sleep at night.

Lanner