Harken's ESP line (Elegant Simple Products) complements other Harken blocks in look and function but the blocks are simpler in design and construction. Sheaves feature axle bearings to handle high static loads. Use ESP Footblocks for reef lines and genoa sheets where the angle is not extreme.
In a stacked configuration, the upper block will have a safe working load and breaking strength of 2/3 of a standalone single. Lockoffs are intended to hold lines temporarily and should not be used in place of stoppers or clutches.
|Breaking Load (lbs)||4409|
|Breaking Load (kg)||2272|
|Fasteners (in)||3x 5/16|
|Fasteners (mm)||3x 8|
|Hole Spacing (in)||Height: 2-5/32 Base: 1-1/8|
|Hole Spacing (mm)||Height: 55 Base: 28|
|Max Line Size (in)||5/8|
|Max Line Size (mm)||16|
|Note||Max Lockoff Load: 1200 lb. (550 kg)|
|Safe Working Load (lbs)||2500|
|Safe Working Load (kg)||1135|
|Sheave Diameter (in)||2.25|
|Sheave Diameter (mm)||57|