Topband: [Bulk] Re: Outdoor rope suggestions

[Grant Saviers]

The smaller diameter (20 to 30mm) ball bearing sailboat blocks are $15 
to $25 as I previously posted.  Here is a slick block from REI for 
rigging ropes up to 15mm.

http://www.rei.com/product/807414/camp-usa-large-mobile-pulley-ball-bearings 
5600# break strength so WLL at 25% is 1400#.

the side cheeks swivel so it works as a snatch block for engaging a 
standing line.  Does more with ball bearings and costs much less and 
weighs a fraction of sailboat or commercial snatch blocks.   A shorter 
length allows more travel before getting two blocked, helpful on gin 
pole and derrick rigging.  There is also a double version.

The type of rope matters, check out New England Ropes.  I hope their new 
owners don't screw them up, they were the best.

http://www.neropes.com/Interim%20Page%20Alternate.html  now 
www.teufelberger.com/

Generally, double braid dacron or dacron/polyester is all purpose for 
hams - UV resistant, very low stretch, doesn't put twist into pulling 
cables or antenna wires, ok for temporary guys (NEVER use nylon!), good 
for climbing and rigging, good wear and fatigue resistance, but not as a 
fall protection line where stretch is needed to reduce the shock load 
(eg use nylon or special purpose lines).

Grant KZ1W


On 9/2/2014 3:30 PM, Richard (Rick) Karlquist wrote:
> Maybe someone can help me here.  The problem
> I am having with pulleys is that they appear
> to add a significant amount of friction.  I
> am not sure if it is in the bearing, or the
> pulley is too small in diameter, or maybe the
> rope diameter doesn't exactly match the
> half round surface of the pulley.  I see that
> rock climbing pulleys are only 2 inches, like
> there is no need for anything larger.  If I
> get one of these super duper pulleys, is my
> friction going to magically go away?  Does the
> type of rope matter in this regard?
>
> Rick N6RK
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