BLOCK DOUBLE ALMN BALL BRNG Rigging Hardware • Harken purchase recommendations when

• Harken purchase recommendations when using 32 mm traveler control blocks:• Use a 3:1 purchase for boats with sail area under 240 ft² (22 m²)• Use a 4:1 purchase for boats with sail area from 240 ft² to 400 ft² (22 m² to 37 m²)• Use a 6:1 purchase for boats with sail area from 400 ft² to 550 ft² (37 m² to 51 m²)• Use a 2:1 purchase led to a winch for boats with sail areas above 550 ft² (51 m²)

NOTE: Do not use SW-2531 to tighten non-metallic caps

For 5/6 Inch O

that is 1” wide

Use with (19) or (20) H

BLOCK DOUBLE ALMN BALL BRNG Rigging Hardware • Harken purchase recommendations whenDouble ball bearing block with anodized aluminum cheeks. Works with 506 35, 506 75, 506 76 for a 4: 1 purchase. Delrin(tm) ball bearing sheaves provide low friction yet high safe working load. Swivel head may be locked in place to avoid twist. Specifications: Sheave Dia. 2" (51mm)Thickness 1 21 32" (42mm)Width 2 1 8" (54mm)Length 5 1 16" (129mm)SWL 1500 lbs. (680kg)Weight 8. 3oz (235g)Max Line 7 16" (11mm)