5/16" Cable x 3.25" Diameter Henry Block Sheave, Zinc Plated, with Self-Lubricated Bronze Bushing. WLL: 1600 lbs. The Working Load Limit (WLL) listed for this sheave only takes into account the sheave and bronze bushing. A qualified person should determine the WLL of your assembly, load pin/bolt, and mounting solution before use.

Henry Sheaves: Pulley Sheaves Designed to Last

Groove shape is optimized for minimum wear.

Conforms to API2C and 8C that requires sheaves to have a 30 degree radius, and that the rim have a transitional flare to minimize wear when the cable is running to another sheave or contact point at an angle.

Henry Sheaves: Self-Lubricating Sheaves Designed to Last

Oil impregnated SAE841 self-lubricating maintenance free bronze bushing.

Heat is generated when the sheave turns, causing the release of the oil from the pores of the bushing, which lubricates the surface. When the rotation stops, the oil cools and is absorbed back into the pores of the bushing.