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Base pins too long
Posted: Sat Oct 29, 2011 3:22 pm
by vinman
I let my buddy who was helping to build his skis sand down the base alignment pins. He probably had the cores switched or backwards because the pins ended up too long and pushed into the base. Way too much to base grind out.
Has anyone had this type of problem and if so what did you try to do to fix it. I'm thinking of cutting a square around the pins belt sanding and replacing the base with a new patch. I'm hoping that if I can flatten this enough like this the rest would flatten with a base grind.
Any suggestions to salvage this pair?
Lesson learned always double check someone else's work especially when they aren't familiar with the process or with tools in general.
Posted: Sat Oct 29, 2011 3:39 pm
by telehead
I always put the core on, then clamp down before I grind the pin to the core height. Then I take the core off and take the pin down just a RCH so it is below the core. This way when you put all the pressure on it in the press there is no chance of pushing down, or sticking up....
Posted: Sat Oct 29, 2011 3:41 pm
by vinman
Yeah I do this too but since I wax busy with something else my buddy did it and I did not check his work.
Posted: Sat Oct 29, 2011 5:53 pm
by MontuckyMadman
dont put pins in the middle of the core, no need, and you are compromising the core structure put them out side the core.
Posted: Sun Oct 30, 2011 3:09 pm
by vinman
I'm going to do surgery on this tomorrow. Going to cut an oval around the defect and then use the orbital sander to flatten things out. Then I'll mix a small batch of epoxy and replace the patch, then cure with heat on the bottom under pressure.
I think this will flatten things enough that a base grind will give and acceptable fix. Since these skis will be use mostly in soft and or deep conditions I think this will work ok.
I guess some lessons are learned the hard way.
I'll update this with a post-op report tomorrow hopefully.
Posted: Mon Oct 31, 2011 5:06 am
by vinman
New idea. Drill out the bump and fill with a ptex gun. This will give a much better look for the final result, nearly seamless fix after a grind/ sanding.
Posted: Mon Oct 31, 2011 9:03 am
by Richuk
Were you thinking of using this type of bits:
http://www.drillspot.com/products/28436 ... rstner_bit
The diameter of the whole will be bigger than the dowel (which is probably a good thing) and not a deep.
Just a thought!
Posted: Mon Oct 31, 2011 9:22 am
by vinman
Pretty much exactly what I was thinking.