Supra wrote: ↑Tue Nov 21, 2023 12:10 am
NEW QUESTION FOR YOU NERDS:
there was a question of FB yesterday - should I take my bindings off when waxing?
The common answer is 'of course! The heat from the iron will make the inserts pull on the base giving you divets'. However, Warren Currie the owner of Easy Rider wrote 'never'. This made me wonder if the taking bindings off theory was actually correct or just made up science. Personally I never took the bindings off in my early years and never had divets. Nowadays I take them off religiously, but leaving them on would save time. What do you guys think?
My understanding of this issue is 'maybe' and 'it depends' based upon my understanding of materials and how heat can impact those materials. Both of the 'maybe' and 'it depends' is based upon how much heat is applied during the waxing process.
The application of heat to most any material will cause it to expand. The more heat, the more it'll expand. (conversely we talk about things shrinking in the cold (especially yur weewee)). However, other variables to add into the equation; materials expand at different amounts, and rates (absorbing more or less energy to expand) and materials have different conductivity.
So an application of heat to a snowboard will cause the different elements of the board to expand, but with a bit of a variable.
It's safe to say waxing will first cause the ptex to expand because that's the area getting direct heat applied. However, the metal inserts will not expand at the same rate, and will need more heat to do so. They stay colder longer because they need more heat to expand, In essence they act as a heat sink sucking the heat out the the ptex base in the areas they're touching.
This means the ptex base in contact with the inserts stays colder than the surrounding ptex, and due to that temperature difference, doesn't expand as much.
However those inserts are a small amount of metal, and for the most part (sans bindings) all we notice is that wax applied over the inserts cools a tiny bit quicker and makes little discoloration dots appear on our board. This happend more when a board is colder than room temp, but I think we've all seen this phenomena.
HOWEVER, the more metal the more heat it takes to warm it up and the more it'll act as a 'heat sink' so now
(IF we do NOT remove our bindings) the addition of screws into those inserts (adding more material) will absorb or 'suck' more heat or alternately keep the ptex base in contact with the inserts colder longer.
Thus, it increases the exapnsion differential... such that if those areas of ptex can't expand at the same rate due to the increased amount of heat it takes to warm up the inserts and the screws, the surrounding ptex expands much more as it heats up and those areas of ptex in contact with the inserts will expand less and in essence create.... "divots".
Infact the whole binding will act as a heat sink to some degree. And also, the insert and the screw will expand at different rates themselves, due to an differential in energy conductivity, but also because the bining is acting as a heat sink for the screw. (they will also cool at different rates, and MAY cause the threads to not seat quite perfectly as they do). I think we've all heard that "waxing with your bindings on can cause your shit to crossthread". While I don't think your screws will cross thread per se, if you get your screws and inserts hot enough, because they'll cool at different rates ( such that the screws will cool quicker than the inserts due to the binding acting like a heat sink to the screw) you could maybe notice your screws are hard to get out because of the threads may not being seated correctly anymore due to an mismatch in cooling rates.
BUT.... but..... but.... but.....BUT....
The amount and variable of material expansion all really depends on how much heat you apply to your board.
Less heat = less expansion = less variable = less divots = less noticeable issues.
Personally, I just don't have my iron hot enough to do much more than melt my wax and cover the base.
I think others maybe have their irons too hot and keep waxing until the base is hot, and thus see more exaggerated results and issues.
TLDR: It depends on how hot you get yur shit.
my $0.0200001