I'm looking to plug holes on a pair of ski's. Your plugs say the plugs a 4.1 but the previous bindings were mounted with 3.5 (wood core)
Will these still work?
Mounting Tools
Lightweight skis may require some unusual mounting tools. For example, some ski specs call for drill bits that are typically used for child skis. Yes, your expensive skinny skis may in fact be designed for children. But hopefully you mount them like an adult by using some of the tools below.
3.5 x 7.5mm Drill Bit - Custom size required for Vapor Svelte and shorter Nano skis (164, 172). Also good for many junior skis.
3.5 x 9.0mm Drill Bit - Step drill bits that can be used with most Movement skis. The 9mm step prevents drilling any deeper.
3.5 x 9.5mm Drill Bit - Nice steel bits that meet the specs of most La Sportiva skis, with the notable exception of Vapor Svelte and shorter Nano skis (164, 172).
3.6 x 9.0mm Drill Bit - This is the bit for Atomic skis with wood cores (including Ultimates), Elan race skis, and folks who like numbers divisible by 0.9.
3.6 x 9.5mm Drill Bit - Black Diamond thinks this is the right bit for putting holes in pre-2020 BD skis. They might know best!
3.8 x 9.0mm Drill Bit - Unusual size preferred by the geniuses at the Trab factory in Bormio. Supplied by the geniuses at Wintersteiger. Also used for Kastle touring skis.
4.1 x 7.5mm Drill Bit - Technically a bit for junior skis, it works great on any thin ski coupled with shallower screws.
4.1 x 9.0mm Drill Bit - The exact specs from most Dynafit, Hagan, & Fischer skis since they have metal plates to drill through.
4.1 x 9.5mm Drill Bit - Some manufacturers like it deep. In this case, they also like metal top plates.
T-Handle Tap - It's recommended to tap the holes for binding screws if they are going through a metal top sheet or reinforcement plate. If you need a 4.1mm wide bit, you will most likely want to tap before screwing with this sharp Wintersteiger tool, unless you like screws with mangled threads.
Torx 20 Tool - Handy T20 driver bit for reaching and turning Dynafit binding screws that are often tucked in close to the housings. Made by Dynafit.
Radical 2 Adjustment Tool - Dynafit's tool for adjusting Radical 2 bindings.
Quiver Killers - Look here.
Hardman Epoxy - The orange double bubble is a slow cure epoxy with a very high shear strength. Flexible, tough, and vibration resistant, this is for bomber mounts and inserts. Cures grey despite being named orange and comes with a mixing stick. 18 hour full cure with a 4 hour work time which is great for anal folks like us. 3.5g per pack, enough for a mount.
Plastic Hole Plug - Little bit of shaped plastic that can be stuffed into a 4.1mm wide drill hole. Insert with epoxy for a water-tight seal. Usually black.
** Please note that you should always double check the specs on your skis and ask the manufacturer if in doubt. Make sure the bit isn't longer than the depth of your skis. Some race bindings have shorter screws so you can get away with shorter bits (e.g. 7.0 or 7.5mm steps).
***Drill bits are from both Wintersteiger and Sun Valley Ski Tools. Based on availabilty.
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Questions & Reviews
5/21/2021
5/21/2021
Because the mounting screw makes the hole slightly larger than the 3.5mm drill bit, the plugs still work just as well!
5/24/2021
Hi Jason, I like to drill out 3.5 holes with a 4.1 bit before putting in the plugs. They slide in much easier that way.
6/3/2021
I didn't end up drilling out the holes. Mixed the epoxy, put some down into the hole and then just used a few light taps from a mallet to push the plug in. Worked great!
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4/21/2021
hey there, I'm hoping to use these stepped drill bits with a drill guide to help get that 90degree angle just right. the guides come with a variety of collars that go over the shank part of the dril bit. What diameter shank are your stepped drill bits in mm? Thanks
4/22/2021
Thanks for your question, Dave. The shank (the part that goes into the chuck of the drill) measures 6mm. The middle part, between the shank and the flute, is 8mm. Please let us know if you have any other questions!
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3/1/2021
what size of drill bits should be used on blackcrows and dps skies
3/1/2021
Hey Yutao,
Thanks for the question! DPS should use a 3.6 x 9.5mm Drill Bit. As for Black Crows, it depends on which ski you're looking to mount. Some use a 3.5 and some use a 4.1.
Thanks for the question! DPS should use a 3.6 x 9.5mm Drill Bit. As for Black Crows, it depends on which ski you're looking to mount. Some use a 3.5 and some use a 4.1.
1/9/2023
FWIW I just got off the phone with DPS, they're recommending 4.1x9.5 on the Pagoda Tour 112RPs I have.
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Just used the 4.1 x 9 bit to mount Marker Alpinists to a pair of Backland 85's and also Mtn Summit 79s. Both skis called for the 4.1 and it worked like a charm, cleanly cutting through with ease. Solid bit.
Comment on this review:
12/20/2020
I'm mounting some Hagan Core Pro 12s on my Voile Vectors. Using the screws that came with the bindings of courses.
Recommended drill bit size? And should I tap?
Recommended drill bit size? And should I tap?
12/21/2020
Eric,
For the Voile Vector series we would suggest a 3.6 x 9.0mm drill bit. It is the ski construction that determines the choice so go ahead and mount up those Hagans and get skiing!
For the Voile Vector series we would suggest a 3.6 x 9.0mm drill bit. It is the ski construction that determines the choice so go ahead and mount up those Hagans and get skiing!
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10/22/2020
Hi
I'm mounting Look SPX 12 on Atomic Punx 7. On the ski it says to use 4.1x9 drill bit.
The ski doesn't have metal sheet in it so not sure if I should use 3.6 or 4.1. I can not find any information if the ski has a mounting plate or not.
I would like to know your opinion.
Thank you very much.
I'm mounting Look SPX 12 on Atomic Punx 7. On the ski it says to use 4.1x9 drill bit.
The ski doesn't have metal sheet in it so not sure if I should use 3.6 or 4.1. I can not find any information if the ski has a mounting plate or not.
I would like to know your opinion.
Thank you very much.
10/22/2020
Thanks for your question, Bobi. We would recommend you follow the manufacturer's direction and use the bit size listed on top of the ski!
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10/6/2020
hi there. I have drilled a woodcore ski with 4.1mm bit instead of 3.5mm. It is brand new one! do i have to put it aside and buy a new pair or there may be some solution?
10/6/2020
Hi Esi,
Well you are not totally hosed yet. If your ski has a metal top sheet at all your screw may hold just fine. However if the screw spins at all or if you just don't have confidence in the screw holding, install a heli-coil. A Heli-coil is a metal insert that works as a core repair for an oversized mounting hole.
Well you are not totally hosed yet. If your ski has a metal top sheet at all your screw may hold just fine. However if the screw spins at all or if you just don't have confidence in the screw holding, install a heli-coil. A Heli-coil is a metal insert that works as a core repair for an oversized mounting hole.
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7/28/2020
Which drill bit do I need for Atomic RT-86 skis and backland tour bindings. Do you sell paper templates?
7/28/2020
Hey Paul, thanks for reaching out! Unfortunately, we do not sell paper templates for the Backland Tour. As for the drill bit: I believe that ski may have a metal plate in it, so a 4.1 x 9.0 drill bit should work. If there isn't metal in it, 3.8 x 9.0 would be the way to go. Many times manufacturers will actually label the drill bit size on the ski itself, are there any details like that printed on your top sheet?
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12/1/2019
Purchased some Kreuzspitze Dynafit SL2 plates from you guys for my superlight 2.0s to be mounted onto BD Helio 116s and 88s. What bit(s) do I need to mount the plates and other items do you recommend?
12/3/2019
Todd, for the Helios the 3.6 x 9.5 will do it.
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12/1/2019
I’m about to mount Salomon STH2 bindings on a pair of Elan Ripstick 96’s. I have a 4.1x9.5 drill bit, but I’m afraid this is overkill since there is no metal in that ski, just carbon tubes. Is 3.6x9.5 the drill bit size I need? Thanks.
12/3/2019
Richard, you are right. A 3.5 or 3.6 is what we use for skis with no metal.
1/23/2020
I used a 3.6 x 9.0 drill bit and it worked out perfectly. Thanks! I just registered.
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7/31/2019
Hi, I'm mounting some Look SPX 12 Dual WTR B120 bindings on a pair of Faction dictator 3.0's, the topsheet of the ski says to use a 4.1x9mm drill bit, but I've only got a 4.1x9.5mm drill bit, will this be alright, or will that penetrate too deep?
8/1/2019
Josh, The extra .5mm will likely be OK, though it's always best to follow the manufacturer recommendations.
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4/9/2019
Hi I’m remounting some plum race 150s on a pair of hagan ultras. I’m trying to figure out the
A) the heel spacing at the heel. I read 4mm online, but can’t confirm.
B) what drill bit would I use to drill the new holes?
C) If I decide to use quiver killers... what would I use for that? Would that replace the above drill bit?
D) If 4mm is the right spacing it looks like I can reuse two of the drilled holes. Is that ok to do?
Any advice would be rad!
A) the heel spacing at the heel. I read 4mm online, but can’t confirm.
B) what drill bit would I use to drill the new holes?
C) If I decide to use quiver killers... what would I use for that? Would that replace the above drill bit?
D) If 4mm is the right spacing it looks like I can reuse two of the drilled holes. Is that ok to do?
Any advice would be rad!
4/9/2019
Hi Jesse,
A) Yes it's 4mm. See here for more info.
B) It should be marked on the ski, but likely 4.1x9 for the Ultras.
C) Look at the QK install kit, which could replace or supplement the above bit.
D) Depends on the ski and it's condition.
A) Yes it's 4mm. See here for more info.
B) It should be marked on the ski, but likely 4.1x9 for the Ultras.
C) Look at the QK install kit, which could replace or supplement the above bit.
D) Depends on the ski and it's condition.
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3/24/2019
Mounting some G3 Ion LT to some G3 Synapse 101 (Carbon). Nothing on the topsheet of the skis... can you recommend a drill bit size?
3/24/2019
Hi Matt, we haven't carried G3 skis, but I believe most models have a metal topsheet and call for a 4.1x9 bit.
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2/28/2019
If I try to install quiver killers on my Dynafit speedfit 84 for my speed turn 2.0 binding and I comes up as below:
1) 4.1 x 9.0mm Drill Bit
2) T-Handle Tap (for quiver killers)?
3) Hardman Epoxy (one pack for 8 quiver killers ?)
4) 8 quiver killers
I already have some fastener kit for my speed turn 2.0.
could you verify for me this list is good enough?
1) 4.1 x 9.0mm Drill Bit
2) T-Handle Tap (for quiver killers)?
3) Hardman Epoxy (one pack for 8 quiver killers ?)
4) 8 quiver killers
I already have some fastener kit for my speed turn 2.0.
could you verify for me this list is good enough?
2/28/2019
Hi liming, for two skis you will need 16 quiver killers. To install quiver killers, you will need the drill bit and install tool, or whole kit, found here.
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11/30/2018
What size drillbit do I use for atomic back land 102 skis
11/30/2018
Hey Chris! Not entirely sure actually! It should say on the topsheet of the ski though! It should be between 3.5mm and 4.1mm by about 9mm long.
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12/28/2017
I just purchased last years Movement Alp tracks LT 106 from you guys. Im getting ready to mount them and wondering what 3.5 drill bit to get. On this page you say the 3.5x9.0 just double checking before I put the bit in them.
Thanks again, Love the site and how helpful you guys are.
-Tom
Thanks again, Love the site and how helpful you guys are.
-Tom
12/28/2017
Hey Thomas! 3.5x9.0 will work on those skis!
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8/9/2017
I notice you don't specify which drill bit would be a 'workhorse' bit, or the classic one I could find in most shops. I've had good success in the past with whichever that bit may be...
For what it's worth, I'll be using it on a couple pairs of Praxis skis. One will have carbon fiber and one will not.
For what it's worth, I'll be using it on a couple pairs of Praxis skis. One will have carbon fiber and one will not.
8/10/2017
Hey Zach! Thanks for reaching out! We don't list the workhorse bit because manufacturer vary their recommendations based on the construction. It's best to defer to the particular ski model to make the decision.
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10/19/2015
Hey!
I see that Atomic specs the 3.6mm bit for their ultimate skis. I'm mounting a pair of the Ultimate 65s and already have a stepped 3.5mm bit. Any reason to think that 0.1mm would make a difference? Normally I'd not even think about it but since race skis are already pushing it strength wise......Thanks!
cheers
anthony
I see that Atomic specs the 3.6mm bit for their ultimate skis. I'm mounting a pair of the Ultimate 65s and already have a stepped 3.5mm bit. Any reason to think that 0.1mm would make a difference? Normally I'd not even think about it but since race skis are already pushing it strength wise......Thanks!
cheers
anthony
10/19/2015
Hi Anthony, it's hard to imagine 0.1mm would make the difference between success and failure, but I have no proof either way.
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10/15/2015
Hi there!
Do you have any 3.6mm bits in stock or can you recommend where I can get them?
Cheers,
Alastair
Do you have any 3.6mm bits in stock or can you recommend where I can get them?
Cheers,
Alastair
10/15/2015
Hi Alastair, we should have more arriving today! Worst case tomorrow. I put them up for pre-order if you want to grab one, thanks.
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