wheel studs???????????

ok....question...drilling new wheel stud holes on my 1940 hubs for my new 5 x 4 1/2 lug pattern........

anyone correct drill bit size??? and / or correct stud size????

I am running 1/2" x 20 lugs

 

btt

 

If you are using studs that are threaded into the axle flange the right drill to tap 1/2 - 20 thread is a 29/64ths. If you are using a 1/2 knurled stud and want to do a pressfit you had best get the studs first as the knurls are all different, i'd do a 3-4thousands interance fit but on a test piece, you want to press the stud in ( 3-4thou might be a bit on the 'soft' side, need to test one first, so buy an extra one or two for throw aways)

 

there just stock 1940 ford hubs......re-drilling them to fit a 1/2 x 20 lug

and new bolt pattern 5 x 4 1/2

 

btt

 

btt

 

What do you not understand about OJ's answer? That's as clear as it can get.

 

so I just wing it....get a set small or big and drill alittle smaller to that size??

 

I have to agree with OJ and ALCHEMY. This is a RELATIVELY simple process with regards to the LOGISTICS of the project, but not a subject to be taken lightly. Re-drilling '40 hubs can go "sour" really quickly if ya don't have your ducks in a row. There's a whole lot more going-on here than just drillin' five new holes the "correct" diameter. OJ answered your DIRECT question pretty much spot-on. It seems like there are a whole lot of directly-related questions that you have failed to ask that NEED to be taken into consideration before you start a project like this. Ya don't just "knock the old studs out" and then get the drill out for the new holes on a deal like this, especially with OLD FORD swedged studs. Be careful...do more homework. DD

 

1/2"-20 x 3" Press-in, .615" dia. knurl and quick start dog end, fits most disc brake Fords front and rear and Chrysler front. Standard hole size: .606" to .613"

1/2" -20 X 3" Press-in, .594" dia. knurl and quick start dog end, fits 1979-03 Mustang. Also has flat on head for front hubs with ABS. Standard hole size: .580".

1/2"-20 x 3" Press-in, .685" dia. knurl and quick start dog end, fits most Chrysler rear with 1/2" stud. Standard hole size: .676" to .683"

1/2"-20 x 3" Press-in, .563" dia. knurl and quick start dog end for use in 1/2" Frankland hubs. Standard hole size: .554" to .561"

This is what Competition Engineering has listed for their studs.

 

hmmmmm sounds right