does a raw surface create more friction than an anodized one?


#1

I have this half raw, half anodized sleipnir
and noticed that the spin seems to last longer during a horizontal trick when the anodized half is facing upward
and will a longitudinal satin help fix this
/


#2

The major source of friction is the bearing and string rubbing on the walls, so in that respect, yes, finish has some effect on spin. The anodized side will have a bit more friction. Skin friction due to air is minimal.


#3

The anodized side will have a bit less friction.
tested on my other 2 polished throws


#4

OK, but it doesn’t seem logical unless what you refer to as raw is really rough.


#5

It does have the characteristic annular lathe marks but is still polished shiny. I just thought it s the same reason why a blasted finish have less friction on grinds.
by this logic I was considering sanding the catch zone longitudinally
want to make sure


#6

.


#7

Well, string on aluminium isn’t quite the same as skin on aluminium. This reddit comment explains it pretty well:
Why is there so much friction between glass and skin, although the surface of glass is so smooth?

Polishing the surface of the yo-yo creates less friction between the string and the walls of the yo-yo. The bumpy surface of blasted yo-yos can actually slow the yo-yo down because of increased friction between the walls and the string. Rougher surface = more friction, right? So why do non-blasted yo-yos drastically slow down when they contact skin?

The inverse of the above is true when dealing with friction between skin and the yo-yo surface. Skin conforms to contours on the yo-yo surface, allowing for a large contact area and effectively increasing friction due to adhesion. A rough surface would create less friction because of the reduced contact area with skin.

Sanding the catch zone to a satin finish would be counter-intuitive, because it would only increase friction between the walls and the string.


#8

didnt answer why at all