UKC Forums - Does Grivel Horn fit DMM Fly?

Does Grivel Horn fit DMM Fly?

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RichJ634 04 Oct 2010

As per title. Thinking about fitting them to my Flys for a little more grip support. Grivel triggers fit great.
Cheers

Martin W 04 Oct 2010

In reply to Ricardo Rockmunch: I don't know about the Grivel Horn but I have successfully fitted Petzl Charlet Griprests to mine, see: http://www.ukclimbing.com/images/dbpage.php?id=127421

You have to drill a hole in the spike of the Fly to get the mounting bolt through (5mm diameter IIRC). The spike is made of pretty tough material so you're best getting a specially hardened drill bit - ordinary HSS bits make no impression. I actually ended up using a tile drill for part of the job, and that was pretty much knackered by the time I'd finished!

You shouldn't need to make any other modifications to the Fly or the Griprest so long as you get the hole in the right place - the locating lugs on the Griprest fit nicely inside the large hole in the Fly's spike. If you offer up the Griprest to the spike without a bolt then you should be able to get it in the right position and mark where the hole needs to be drilled that way.

mlmatt 04 Oct 2010

In reply to Ricardo Rockmunch:

I've done the same as Martin W and retrofitted some quark griprests to my flys. They are a pretty easy modification to make. I added some duct tape to make the picky rest a little less severe on the pinky after a couple of routes use.

Getting a cobalt/titanium tipped drill bit is best and drill it out slowly not letting the metal heat up.

to Martin W, I see you've add a grivel finger rest? do you find that it makes much of a difference?

hope your mod goes well. I tied a loop of 3mm cord through the spike of each axe and clipped in a lanyard (3mm elastic and camp nano biner) so I didn't drop them. Useful for if your not used to not having a least.

OP RichJ634 04 Oct 2010

In reply to Martin W: Cool idea. Unfortunately I have no equipment for drilling here at uni and I don't really want to buy a drill and drill piece. I'd rather fit the grivel horn, or failing that grivel slider. I know the slider fits but the horn is less bulky.

gear boy 04 Oct 2010

In reply to Ricardo Rockmunch: as you have no tools then the slider is your only option, you may have to cut away the rubber grip at the base to get it on, and it feels slightly different as your hand position moves up the shaft slightly,

either that or find a mate with a drill and a 5mm drill bit to fit quark rest,

Grivel horns looked a total no go when I researched, I fitted quark rest and it works good, but not as good as blowing loads of money on new tools!

petestack 04 Oct 2010

In reply to gear boy:

> you may have to cut away the rubber grip at the base to get it on

Shouldn't have to...
http://www.petestack.com/blog/climbing/clippers-and-grip-rests-for-dmm-flys...

(PS Now happily using my BD Spinner on BD Vipers!)

Martin W 05 Oct 2010

In reply to Ricardo Rockmunch:

> (In reply to Martin W) Cool idea. Unfortunately I have no equipment for drilling here at uni

Does your university have an engineering department? If so then I bet you could get someone there to do it for you, probably in return for beer. Best to approach a lab staff member, you don't want to let engineering students loose on your axes. Especially not engineering students with beer inside them. I know, I used to be one...

OP RichJ634 05 Oct 2010

In reply to Martin W: Haha. My climbing partner is an engineering student. As it happens I've decided to just use leashes and make do without any mods. I'd rather keep the money I'd spend on horns/sliders for a better of pair axes in a few years.