EpicSki › The Barking Bear Forums › On the Snow (Skiing Forums) › Tuning, Maintenance and Repairs › Helicoil pulled out - now what?
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Helicoil pulled out - now what?

post #1 of 9
Thread Starter 
Hi,

Wood core ski with metal binding topsheet - Volkl P10 RS 205cm.
Want to see how fast these will go . . .



They are drilled for Marker's, and all other holes are OK. This is the top hole for one toe piece.

Thought of:
1) Structural Epoxy for the helicoil - what brand/kind to use?
2) Use a wood plug (hard maple) in the hole with Titebond III waterproof glue and re-drill for the screw without using the helicoil
3) Add a Riser plate (where can I find one to fit a ski this old) and mount to that
4) Another set of bindings with a 4-hole pattern toe
5) Screaming - paid $10 for the skis ($30 for shipping) and the bases are pristine! It's a thrill to go 60+ mph on skis like these . . .

Thank you for your help,
A White Raven
post #2 of 9
  1. Wouldn't really trust a structural epoxy (alone) there, ideally you would have some sort ofa mechanical bond too.
  2. I would do this, with epoxy, personally.
  3. You could make/have made a riser out of HDPE or UHMPE.
  4. Would work, if you can find another pair for cheap
I'm not sure if that is an actual heli-coil, that looks more like a rivnut type of insert to me, but don't quote me there. I also have some snowboard style threaded inserts. You drill a through hole, countersink the base and then epoxy the insert in place. The bottom of the insert is P-tex, so you level the local area and you are good to go. If I remember correctly these are 6mm threads, so you would have to verify that you can get some sort of a 6mm machine bolt in the binding for this to work.

I can send you one of these if that would work.
post #3 of 9
Easiest solution would be to stick a plate on it, that way you have no worries about it pulling back out.  Also worthwhile since you want to go faster on it!  If you use one of the non binding specific plates would you can reuse the binders.  I may have a GS plate sitting somewhere that  that would fit the bill if you are interested.  Alternatively you could make one - chopping board material can work 

I agree with KRP, I am pretty sure that is a standard rivnut from the Markers rather than a helicoil. 
If you want to switch the binders out I would suggest using a set of Sollys or tyrolias to get a four hole toe.  If this is a set of M51s currently  you can reuse some of the existing holes with either of these options.  The rear heel piece screws have the same spacing and with a little bit of persuasion you could also get the 2 rear toe piece screws in the existing holes with either of these options.  Health warning  This is not of course a sanctioned or tested modification that would be approved by a certified technician!
post #4 of 9
You need special tools to insert heli-coils properly, don't want it coming out when you are screaming down run....  I would fill the hole and use a riser plate.
post #5 of 9
Thread Starter 
Hi,

Thank you all for replying. I really appreciate it a lot.

For note: yes, this is a "helicoil" I got at a local shop. They also had press-in types, but since I had the metal topsheet I decided on the screw-type. The photo just shows the 'ciol attached to the Marker toe pin.

The snowboard-style insert might work, but the riser would be safer at speed. Then I can still use the M51s (have a few extra pair lying around).

A local plastic shop sells scrap by the pound. I should be able to get a few narrow strips of HDPE that will work.

Otherwise, I may ask you, Scots, to look for your risers.

Again, thank you all very much,

A White Raven
post #6 of 9
helicoil:




Not a helicoil:



Rivnut:



No offense, but if your shop called what you posted a helicoil you might want to start having work done elsewhere
post #7 of 9
Quote:
Originally Posted by krp8128 View Post

helicoil:




Not a helicoil:



Rivnut:



No offense, but if your shop called what you posted a helicoil you might want to start having work done elsewhere


 

Semantics.  They all serve the same purpose.  Helicoil has become a generic name like Kleenex.

Truthfully, if you aren't going to ski those skis much, I seriously wouldn't be scared of skiing those bindings without that screw.  The new ones don't have it.  Look at where your forces are when the boot is in the binding....  the two under the toe take most of the force.
post #8 of 9
Quote:
Originally Posted by U.P. Racer View Post




Semantics.  They all serve the same purpose.  Helicoil has become a generic name like Kleenex.
Fixed it for you-

Yes, they all serve the same purpose, holding a screw in a damaged whole or (Rivnuts) holding a screw in thin material. The difference is in their specific application, some are much more suited to certain situations.

True helicoils repair threads with a slightly oversize hole. Those screw-in brass inserts are going to need a bigger hole, and make a heck of a lot more damage when they pull out, and pretty much leave no option for an insert repair after the fact.

Either plug it with a hardwood plug and re-drill (easy), or ski it as is and keep an eye on it. A t-bolt fom the bottom is only worth it if you want to ski these everyday.
post #9 of 9
Thread Starter 
OK, I'm back to considering. The hardwood plug seems so easy, though and I probably won't use these in the bumps since they are a bit stiff (actually, they don't really flex that much at all!). My 20 year old 205 Elan Super G's on the other hand are great in the bumps.

It's just that I never had the chance to ski on these when they were "in", so I want to see what they are like.

Thanks again to all,
WR
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EpicSki › The Barking Bear Forums › On the Snow (Skiing Forums) › Tuning, Maintenance and Repairs › Helicoil pulled out - now what?