Redrilling front rotors - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Spray-Bomb · 02-20-2009, 12:51 AM

Have any of you done this at your shop ???

If so what are your opinions on the best way to do it

I want to ReDrill my front rotors from 5x5 to 5x4.5

Thanks, Matt

Twisted Minis · 02-20-2009, 01:05 AM

I outsource it to a machine shop.

Scottshotrods · 02-20-2009, 11:00 PM

we have a fixture we made that bolts on our mill that
holds them in place.You can
buy the rotors already drilled with the bolt pattern
you want.You do not have to be bothered with it.
justin
www.scottshotrods.com

*Shane* · 02-21-2009, 01:40 AM

Quote:

Originally Posted by Scottshotrods

You can
buy the rotors already drilled with the bolt pattern
you want.

Do you have a a link for 5 x 4.5" calipers for truck spindles?

p8ntballer1911 · 02-21-2009, 09:08 AM

I sent my rear axles off to http://www.moserengineering.com/ to get them re-drilled. VERY QUICK turn around. They also do hubs.

Spray-Bomb · 02-21-2009, 02:05 PM

Thanks guys

My rear is already 5x4.5" as it is a ford 9"

HotRodYJ · 02-23-2009, 12:40 PM

I redrilled my rear axles and drums last week myself at home. I layed out a templete in CADD at work and then transfered it to a metal templte once I got home. The templete bolts to the existing lug pattern so I can centerpunch the 5 new hole locations. Then I made a simple jig on my drill press to hold the axle shafts nice and flat and drilled them. Easy as pie. A front rotor shouldn't be any harder than that assuming there is no webbing on the back side to get in the way of an offset new pattern. The drums and rotors both lay flat on a drill press so all you should need is a templete to get the hole locations correct.

SCOTI · 02-23-2009, 01:43 PM

Quote:

Originally Posted by HotRodYJ

I redrilled my rear axles and drums last week myself at home. I layed out a templete in CADD at work and then transfered it to a metal templte once I got home. The templete bolts to the existing lug pattern so I can centerpunch the 5 new hole locations. Then I made a simple jig on my drill press to hold the axle shafts nice and flat and drilled them. Easy as pie. A front rotor shouldn't be any harder than that assuming there is no webbing on the back side to get in the way of an offset new pattern. The drums and rotors both lay flat on a drill press so all you should need is a templete to get the hole locations correct.

There is 'webbing' that interferes. I'm not sure how difficult it would be to overcome for the DIY'er @ home.

HotRodYJ · 02-24-2009, 02:07 PM

Screw in studs could be an easy answer. What do the machine shops do? Do they machine down the "webbing" and weaken the rotor?

02-20-2009, 12:51 AM	#1
Spray-Bomb Texas Big Wig Join Date: Jan 2007 Location: Mineola, Texas Posts: 5,620	Redrilling front rotors Have any of you done this at your shop ??? If so what are your opinions on the best way to do it I want to ReDrill my front rotors from 5x5 to 5x4.5 Thanks, Matt __________________ Just not low enough... ----------------------------- Sinister Killer

02-20-2009, 01:05 AM	#2
Twisted Minis Registered User Join Date: Nov 2008 Location: Windsor, CA Posts: 500	Re: Redrilling front rotors I outsource it to a machine shop. __________________ If you can find it cheaper, I can fix it!

02-20-2009, 11:00 PM	#3
Scottshotrods Registered User Join Date: Oct 2008 Location: oxnard ca Posts: 2,201	Re: Redrilling front rotors we have a fixture we made that bolts on our mill that holds them in place.You can buy the rotors already drilled with the bolt pattern you want.You do not have to be bothered with it. justin www.scottshotrods.com

02-21-2009, 09:08 AM	#5
p8ntballer1911 Bodydropped71 Join Date: Jun 2008 Location: Conroe Texas Posts: 264	Re: Redrilling front rotors I sent my rear axles off to http://www.moserengineering.com/ to get them re-drilled. VERY QUICK turn around. They also do hubs. Last edited by p8ntballer1911; 02-21-2009 at 09:09 AM.

02-21-2009, 02:05 PM	#6
Spray-Bomb Texas Big Wig Join Date: Jan 2007 Location: Mineola, Texas Posts: 5,620	Re: Redrilling front rotors Thanks guys My rear is already 5x4.5" as it is a ford 9" __________________ Just not low enough... ----------------------------- Sinister Killer

02-23-2009, 12:40 PM	#7
HotRodYJ Registered User Join Date: Jan 2008 Location: Johnson City, TN Posts: 264	Re: Redrilling front rotors I redrilled my rear axles and drums last week myself at home. I layed out a templete in CADD at work and then transfered it to a metal templte once I got home. The templete bolts to the existing lug pattern so I can centerpunch the 5 new hole locations. Then I made a simple jig on my drill press to hold the axle shafts nice and flat and drilled them. Easy as pie. A front rotor shouldn't be any harder than that assuming there is no webbing on the back side to get in the way of an offset new pattern. The drums and rotors both lay flat on a drill press so all you should need is a templete to get the hole locations correct. __________________ 66 Chevy Stepside tandem project My junk: http://67-72chevytrucks.com/vboard/s...d.php?t=480902 Last edited by HotRodYJ; 02-23-2009 at 12:42 PM.

02-24-2009, 02:07 PM	#9
HotRodYJ Registered User Join Date: Jan 2008 Location: Johnson City, TN Posts: 264	Re: Redrilling front rotors Screw in studs could be an easy answer. What do the machine shops do? Do they machine down the "webbing" and weaken the rotor? __________________ 66 Chevy Stepside tandem project My junk: http://67-72chevytrucks.com/vboard/s...d.php?t=480902



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