Harken 2634 57mm Double Carbo Ratchamatic Sailboat Block
HARKEN 2634
Double Carbo Ratchamatic® Block - 57mm
The Carbo Ratchmatic® 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 holding power of the 57mm is as high as 10:1.
For the ultimate system, mount a Ratchamatic® on the boom above a cockpit-mounted switchable ratchet to double holding power in heavy air and to ensure a free-running mainsheet in light air.
Use for:
Double Carbo Ratchamatic® Block - 57mm
The Carbo Ratchmatic® 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 holding power of the 57mm is as high as 10:1.
For the ultimate system, mount a Ratchamatic® on the boom above a cockpit-mounted switchable ratchet to double holding power in heavy air and to ensure a free-running mainsheet in light air.
Use for:
- Main / jib sheets
- Asymmetric spinnakers
| Mfg No. | Sheave Diameter |
Length | Shackle Pin Dia. |
Max Line Diameter |
Max Working Load |
Breaking Load |
Weight |
| 2634 | 2-1/4" (57mm) |
4-9/16" (116mm) |
1/4" (6mm) |
3/8" (10mm) |
750 Lbs (340kg) |
1,875 Lbs (851kg) |
7.2 oz. (204g) |
Harken 2634 57mm Double Carbo Ratchamatic Sailboat Block
Sale price$311.95
Regular price$354.05
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Harken 2634 57mm Double Carbo Ratchamatic Sailboat Block
Sale price$311.95
Regular price$354.05