ARB 03+ question...

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13 mm drill bit?

ARB's instruction call for drilling with a 13 mm bit to mount the brackets to frame horns. I don't recall this in anyone's write up for the '03 combo bar? I know it has to be pinned in with using a 10 mm bit. Where the hell can you find metric bits these days? Sears, Lowes, Autozone, and Menards don't carry them :censor:.
 
ARB's instruction call for drilling with a 13 mm bit to mount the brackets to frame horns. I don't recall this in anyone's write up for the '03 combo bar? I know it has to be pinned in with using a 10 mm bit. Where the hell can you find metric bits these days? Sears, Lowes, Autozone, and Menards don't carry them :censor:.

Just use a 1/2" drill bit.
13mm = 0.5118"

I have called ARB before and they have said that if you need a 13 or 12mm drill bit from their manuals to just use a 1/2" bit.
 
Layonnn said:
Just use a 1/2" drill bit.
13mm = 0.5118"

I have called ARB before and they have said that if you need a 13 or 12mm drill bit from their manuals to just use a 1/2" bit.

Good call - now to find a 10 mm bit!
 
Trunk Monkey said:
You know you can just hold the bolts up to the bits and match them up that way?

I figured the "pinned" bolt hole should be as close to the bolt diameter as possible? Am I over thinking this?
 
I mounted up my crush zone mounts earlier today, first time using a rotary saw on metal:D Not excited for the drilling though, but power tools make everything easy. Thanks to midterms and some drafting thats due, wont finish til sunday:bang:
 
I used all SAE bits and it's been 3 years with my bar on. But you do what you think is best.

x2.
Just use all SAE bits. You would more than likely have to order from online all metric drill bits. I have never seen any in stores. It will be a close enough fit with SAE bits.
 
And so it shall be - I will use SAE bits, but if my bar moves .003" I'm blaming you guys.
 
Don't sweat the details, SAE drill bits will be beyond fine for any/all holes. Fwiw a decent tool shop will have individual high-speed-steel drill bits in /64'ths increments so you can get as close to the 10mm or 13mm as you would like. We've installed hundreds of ARB bars and snorkels and never used a metric drill bit :D

That said, a good tool shop could probably order those too :D
 
I started the install last night and found a couple of surprises. The bumper brace threaded holes and bolts are rough shape. It looks like two of these (one per side) are used to hold a 10mm bolt for the ARB bumper mounts. One side is stripped out and the other side has a broken off bolt in it. It appears the PO must have had a fender bender based on the Taiwanese bumper cover and s****y repair work. With the mounts already being secured with the 2 existing frame bolts and the new ARB cross bolt, do I need to worry about using these bolts( drilling, tapping, helicoil, etc)?
 
Nevermind....my LC now has its first SAE threads. I was able to drill/tap new threads.
 
That's exactly what I used.

Does this gap look right for a 03+ combo on a 2000? I have about a 3/4" gap between the bumper and truck. The fender matches up fine.
image-1438948694.webp
 
Fender spacing - not pinned yet.
image-1701288768.webp
 
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