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Drilling Carbon Fiber helmet? anything I should know?

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Old 03-20-2017, 10:29 AM   #1
mrbill_fl
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Default Drilling Carbon Fiber helmet? anything I should know?

I want to tap into the knowledge base of Rennlist.


I just got my Bell CF helmet, and need to install the R3 anchors, among other things (communicator, speakers, etc)

Anything I should know before removing the inner pads and drilling holes?

is it just like fiberglass? tape and drill?

in the past I used a hot glue gun to reattach the helmet pads, IS there a better alternative? (it worked but not great)

Any tips or advice before I begin?


-adding, is there a better bracket for an older chatterbox attachment to the outside of the helmet? I think I read someone here fabricated one.. mine is a stock clamp style that is only works fair.
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Old 03-20-2017, 10:34 AM   #2
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If it's a new helmet, it should have the anchors in for a H&N restraint. No need to drill. Also, I thought there was a rule about not drilling helmets in certain series?
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Old 03-20-2017, 10:35 AM   #3
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no anchors, ordered from OG... backlog was only 1 week.

SA 2015

(fwiw, I installed the 2) D rings on last 2 FG simpson helmets)
racing radios did the comm.
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Old 03-20-2017, 11:32 AM   #4
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I thought the SAH2010 requirement for the anchors was rolled into the SA2015 standard. The SA2015 standard has a section on testing the HNR anchors, so I thought all helmets had them in it. I'm surprised your helmet doesn't have them.
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Old 03-20-2017, 01:14 PM   #5
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I have a CF Arai and that company says no drilling of any kind. When I had my comm equipment installed, the earpiece jack was mounted to the shell with a plastic mount using zip ties and adhesive. A hot glue gun is the go to for reinstalling the padding.

CF is way different than fiberglass in this respect. It helps to think of CF like a chain link fence. Cutting a link in the fence causes all the other links that were in the same row to lose strength. Drilling a hole in the CF weave is the same as cutting a link in the fence. I use a variety of CF products and all the companies frown on drilling holes.

If you plan on using a H&N restraint, I would seriously consider returning that helmet for one that has the SA2015 mandated mounts.
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Old 03-20-2017, 03:12 PM   #6
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I'm pretty certain that part of the SA 2015 regulation is you cannot structurally modify helmets any longer including drilling for H&N anchors or even a drink tube. This is why you see all of the anchors pre-installed in the manufacturing process on the 2015 units.
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Old 03-20-2017, 03:22 PM   #7
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Pretty sure any SA15 helmet should have M6 thread pre-tapped. I would not drill it.
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Old 03-20-2017, 07:12 PM   #8
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Ok you're right, I'm wrong....

I had to pull out my old helmet and compare where the anchors sit.
I looked at the holes and thought those were for a hans and figured I'd have to drill for the R3.

no, There's plastic screws in the mounting points! sweet!

What are those holes for? and what do I do about the chatterbox mount?




I think I have 2 student comms. for this weekend. so just need to fit the d rings.


Thanks for the help!
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Old 03-26-2017, 02:12 PM   #9
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those holes look like ventilation holes

Do NOT drill a CF helmet. In FIA terms (8860, 8858) any drilling makes the helmet ineligible for use. I also agree that current SAH spec is either pre-drilled or has the inserts in place, and the structure of the helmet is reinforced at the anchor spot.

For comms, drinks, et al, use adhesive tie-blocks or fit them inside the helmet under the cheekpiece.

As an interesting side note, in the past few months I've observed track/safety personnel inspecting helmets more, and after any incident if there is evidence of helmet contact (on the helmet or in the car) they cut the chin strap (this was at sanctioned events, not DE)
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