HARKEN 57mm Carbo Ratchamatic Cheek Block, 2633

Harken 57mm Carbo Ratchamatic Cheek Block for Line-shedding and a small mounting footprint with drain holes.

Carbo Ratchets cheek blocks allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing. Lightweight Carbo Ratchets are available in 40mm, 57mm and 75mm sizes. All the Carbo Ratchets feature a recessed On-Off switch that is easily operated from either side. The 40mm cam-arm versions work in ratchet mode only. Commonly 57mm blocks are for jibsheets and spinnakers on medium sized dinghies.

The 40mm, 57mm and 75mm Carbo Ratchamatic® is adjustable for many applications and weather conditions. The load-sensing ratchet block rolls freely in both directions under low loads, then engages the ratchet automatically as loads increase. With 180 degree wrap, you get a 10:1 holding power.

• Mounts on port or starboard
• Ratchamatic cheek blocks include metric roundhead screws and nuts
• Hand-hold your loaded lines
• Use for spinnaker sheet systems on dinghies, sportsboats, and medium keelboats
• Ratchet cheek blocks are hand and crew savers
• Allows a line to be eased instantly with control
• On/Off switch allows the ratchet to be turned off in light air
• Hardkote-anodized aluminum sheaves
• Sheave Diameter: 2 1/4" (57 mm)
• Max. Line Diameter: 3/8" (10 mm)
• Max. Working Load (MWL): 500 lb. (227 kg)
• Breaking Load: 2000 lb. (907 kg)
• Weight: 2.5 oz. (71 g)
• Length: 3 1/4" (83 mm)