Hiya all!
Found this vid with awesome looking drilled moments.
You can see them at 1:50
Im looking at drilling my old Moments to save tome weight.
How do you do it? what machinery is required and is there a special method?
i havent done it myself but i have seen some that just have holes drilled in them. I would say that a drill press would be a tool that would help out tons and help keep the holes nice and straight.
I got drilled cranks from Will Riley on my flatland uni now, it doesn’t feel like the strength has been weakened at all…
I drilled my moment (150’s), with five 5/8" holes in each crank. I used a drill press a clamped the crank down. I had a little trouble with the bits moving so the holes aren’t perfectly centered, but they’re certainly close enough.
I drilled a set for a second pedal hole and found that if you drill from the back the drill does not wander as much. I drilled in 4 steps to get to 1/2" but feel I could have easily done it in 3.
I was thinking of getting 150s and drilling 130 & 110 triple holes.
Would that be good for a 36er in most circumstances?
For those of you drilling for pedal positions: Do you guys change pedal positions during rides? Or just before a ride? Seems like it would be annoying to switch pedals around very much during a ride.
I’ve switched mine in a ride before. This has been great on my 36-er when riding on road and coming to an off-road xc section. I have done it once or twice on my Muni but now I just stick to one length.
just got these… I cut the cage on the inside toward the cranks so it would pass the second “chuck” and when I get my 36er back from where it is, I’ll give it a try.
Here’s how:
Tools required: milling machine, end mill, vise.
Also:
-corbin
A Milling machine is hands down the way to go.
The idea is to Mill out a channel rather than just drill holes.
Or in my case both:
I lost somewhere between 35-40% of the weight. Ive been riding nothing but these cranks for over two years now and they haven’t bent, cracked or failed in any way, yet.
Cheers Corbin! Yeah Sam I love yours! what length are your cranks and what diametre holes?
A Drill Press will do the trick right? just take them to metal work…
You went all the way through (I think? Pic isn’t too clear) - haven’t seen that before! How much do they weigh now?
Sam
I would think doing a bar like that would be bad for the impact disciplines like street and trials though?
Theres only one way to find out…
My logic:
I snapped my Schlumph axle last year so I would love it if these cranks broke first!
A mechanical engineer i know did the drilling and they seemed to think that it should be fine.
Diden’t get a weight, but its definitely noticeable.
Ive never seen bent Moments…I always bend pedal axles first…Maybe they are stronger than you think?
here are a few more pics
…
It’s very interesting. I know that if I had it done to my cranks though, I would leave at least one cross piece in the middle. But I am no structural engineer 
The more I think about it the more I think that those cranks would be OK, as long as don’t risk denting the bottom part with crank grabs.
Oh an by the way, sweet Guni (29?)