"Owen Lowe" wrote in message
news
On some woods, you can cause heat checks in the end grain from
overheating. My rule is that if it's too hot to continue sanding, then
slow it down.


Hmmmm, my book says sand with less pressure at whatever speed you care and
you'll get less heat. Coefficient of friction being basically the same,
(might actually be less at low pressure) it all depends on pressure, not
speed.

Years ago, a regular to this group, Lyn Mangiameli, discussed slow speed
sanding. After I tried it I was a convert - I now rarely sand above 500
rpm - and oftentimes it's much slower depending on the work diameter.
I'll see if I can look up the thread and post the link.


Yeah, Lyn discussed a lot of things. Some of which made good sense. This
is not one of them. Lathe speed when paper is unpowered is worth keeping at
a reasonable rate, but that's for the operator's safety. When paper is
powered and circular, you can have an additive, subtractive, or composite
speed _at any given point on the circumference_, which really complicates
things. Makes pontification on speed just that, though once again, speed
doesn't produce heat.

Sort of like your comparison of the weight of the Robust vs Oneway, it's
meaningless. Rigidity is what counts. The rest can be bolted securely in
place, and already is on the heavier lathe.