|
Ball bearings carry both the line load and prevent sheave from rubbing on the cheeks of the block. Roller bearings permit maximum loads in a small pulley. All pulleys have stainless sideplates to properly distribute loads. Delrin sheaves provide the strength, endurance and chemical resistance required by marine applications and harsh environments. Sheaves are designed for synthetic line like our Dacron® rope. Both pulley types feature "swivels." These are important because rope twists under tension. This can twist your antenna and this is important in some configurations. |
|
Sheave diameter = .875" Line size = 3/16 or 1/4" Breaking strength = 1200 pounds Shackle pin diameter = 3/16" Length = 1.5" Max Working Load = 200 pounds Ball bearings Tough Delrin sheave is UV stabilized for years of trouble -free service. |
Sheave diameter = 1.125" Line size = 5/16" Breaking strength = 2000 pounds Shackle pin diameter = 3/16" Length = 2" Max Working Load = 300 pounds Roller bearings Teflon™ impregnated, Hardkote anodized aluminum sheave. |
| I have suggested using high
quality "Sailboat" or marine quality pulleys in several of my publications.
This type pulley is precision made so that there is little space between the
sheave and sides of the pulley. Unlike hardware store pulleys, it's all but
impossible for your antenna support rope to jam the pulley by rolling off the
sheave. Since pulleys of this type are almost impossible to find in most areas of the country, I have selected two models which are very well suited for use with the high quality antenna support rope that we sell. These pulleys are manufactured by one of the preeminent makers of sailboat rigging. |
