Hub and rotor re-drilling

seionkelley

seionkelley

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Ok, has anyone on this site re-drilled their hubs and rotors themselves? If so, do you have instructions on how to do it? Does anyone have a template that I can use?
Thanks
 
I've only done the rear before when I put a MN12 IRS in the back of my F100.

The fronts are easier to just use Mustang hubs.

Just make a template. Measure the hub diameter, scribe circle, scribe bolt circle, mark off 5 equal distances. Drill out the hub circle, and drill the lug locations to 1/4". Knock out lugs from hub, set template on hub, center new lug location between old, use a 1/4" transfer punch to locate the new lugs. Drill, reinstall lugs..

Rotors can be done on the car using the hub to center the rotor and template. (Do this prior to reinstalling lugs. Mark, drill, and chamfer the backside of the new holes. (Match the originals)
 
Is that a 1/4 inch drill bite and what type of drill bite to use?

SATURN5 said:
I've only done the rear before when I put a MN12 IRS in the back of my F100.

The fronts are easier to just use Mustang hubs.

Just make a template. Measure the hub diameter, scribe circle, scribe bolt circle, mark off 5 equal distances. Drill out the hub circle, and drill the lug locations to 1/4". Knock out lugs from hub, set template on hub, center new lug location between old, use a 1/4" transfer punch to locate the new lugs. Drill, reinstall lugs..

Rotors can be done on the car using the hub to center the rotor and template. (Do this prior to reinstalling lugs. Mark, drill, and chamfer the backside of the new holes. (Match the originals)
Click to expand...
 
I used a 3 jaw clamp then dialed the part in using the center hole
Then used the bolt circle program on the Bridgeport set to 5 X4.25
 
Redrilling hubs now, have you ever worked on a car at all before???
 
hubs_after.jpg
 
slowmkviii said:
Why not new cobra hubs for the rear go
for $195 now per side
Click to expand...
He based that remark on two things. One is the machine shop here would charge about $120 to redrill them and he feels (as I do) that it would weeken the hub. The other part is that I have shown him Cobra hubs for $80 each online before.
So it seemed cheaper, safer and easier to buy Cobra hubs.


His comment was also based on the fact that front Mustang hubs are a dime a dozen and simple to swap so why bother drilling the front hubs.
 
LaserSVT said:
He based that remark on two things. One is the machine shop here would charge about $120 to redrill them and he feels (as I do) that it would weeken the hub. The other part is that I have shown him Cobra hubs for $80 each online before.
So it seemed cheaper, safer and easier to buy Cobra hubs.


His comment was also based on the fact that front Mustang hubs are a dime a dozen and simple to swap so why bother drilling the front hubs.
Click to expand...

Redrilling the hub will not weaken it. It's no different then redrilling an axle. If one was really anal enough, you could lathe up some plugs for the original holes.
 
Ya know...if you could get the hubs redrilled for the mustang lugs...that would be a nice mod so you could swap rims for seasons
 
^^^ you wouldn't want to do that cause you would be pressing in and out
studs and would eventually wreck the stud holes
 
Buy mustang front hubs and get your rear hubs redrilled by the above link "irsmachining" (I had that guy do mine). Then If youre a cheap azz use your newly maching hubs as a template to drill your mark rotors. Simple as pie.
 
LaserSVT said:
He based that remark on two things. One is the machine shop here would charge about $120 to redrill them and he feels (as I do) that it would weeken the hub. The other part is that I have shown him Cobra hubs for $80 each online before.
So it seemed cheaper, safer and easier to buy Cobra hubs.


His comment was also based on the fact that front Mustang hubs are a dime a dozen and simple to swap so why bother drilling the front hubs.
Click to expand...

I could see it being a problem if you have to pay that much to get it done.


As far as it being weak, if you look at the pic I posted there is plenty of meat between holes, more material there compared to how much is there from the stud to the outside Diameter.
You will break something else before a re-drilled hub becomes a issue.
 
Reviving this thread...I've been thinking of doing a hub swap lately, I understand the concept of what has to be done for the most part, but have a question.

For the rears, remove and redrill stock hubs, knock out old studs, press in new studs in new hole locations. Use the hub that's been redrilled as a template to redrill the stock rotors also and finally get some hub centric rings.

For the fronts, remove old hub and install sn95 mustang hub and redrill lug holes on stock front rotors. My question is how would you go about enlarging the center bore on the stock rotor? I don't want to mess with brakes as I just replaced them with brand new rotors, so I'd like to keep all stock brakes for now.
 
you don't need to mess with the front center bore at all. mustang and mark hubs have the same rotor center bore.

and if you use a redrilled mark rotor and redrilled mark hub, you also don't need rings. why would you? its the same combo. you just moved the holes.
 
LaserSVT said:
He based that remark on two things. One is the machine shop here would charge about $120 to redrill them and he feels (as I do) that it would weeken the hub. The other part is that I have shown him Cobra hubs for $80 each online before.
So it seemed cheaper, safer and easier to buy Cobra hubs.


His comment was also based on the fact that front Mustang hubs are a dime a dozen and simple to swap so why bother drilling the front hubs.
Click to expand...

Where have you found rear Cobra hubs for $80? I will order them this weekend for that price. Cheapest I have seen is summit for $155 with free shipping. Already got an extra set of axle stubs from the junk yard to press them into to make the swap go a little quicker.
 
chris2523 said:
you don't need to mess with the front center bore at all. mustang and mark hubs have the same rotor center bore.

and if you use a redrilled mark rotor and redrilled mark hub, you also don't need rings. why would you? its the same combo. you just moved the holes.
Click to expand...

Correct me if wrong but aren't the center bores on the hubs different sizes between the mark viii and mustang? If you have mustang hubs in front no centering ring would be needed..I get that..however in the rear since I'd be using stock mark hubs (redrilled) wouldn't you need the centering ring to make up the size difference for the hub center? The center of the hub is what "centers" and holds the wheel in place when its mounted..not the lug holes. And yes I realize I used the word "center" like 5 times in one breath lol
 
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