Harken 2683 Single 75mm Carbo Ratchamatic® Swivel Block w/150 Cam-Matic
The Carbo Ratchamatic® is a load-sensing ratchet block that rolls freely in both directions under low loads, and automatically engages the ratchet as loads increase. Shifting between ratchet and light air modes is seamless. Unloaded main and jib sheets run out freely during mark roundings and asymmetrical spinnakers free instantly during jibes.
Ratchet engagement may be adjusted to a higher or lower load according to strength and sailing style. The Ratchamatic® cheek block mounts on either port or starboard. Holding power of 75 mm up to 15:1.
For the ultimate system, mount a Ratchamatic® on the boom above a cockpit-mounted switchable ratchet to allow the mainsheet to run freely in light air, and ensure double holding power in heavy air.
Use for: - Main/Jib Sheets - Asymmetric spinnakers
Dimensions: Sheave diameter: 2-15/16 in (75 mm) Length: 5-7/16 in Weight w/shackle: 15.5 oz Max. line diameter: 7/16 in Shackle pin diameter: 1/4 in Holding power w/180 degree wrap 50 lb (23 kg) 15:1 Safe Working Load: 300 lbs Breaking strength: 750 lbs Safe working loads and breaking strength based on cam strengths.
While we carry a ton of Harken hardware, some items are special order only. Call or email for details.