2634
57mm Carbo Double Ratchamatic Block
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. Use the 2634 with a 402 or 403 swivel arm for a versatile two-speed mainsheet system.
Technical specifications · Harken 2634
| Sheave diameter | 57 mm |
|---|---|
| Length | 116 mm |
| Weight | 204 g |
| Maximum line diameter | 6 mm |
| Shackle pin diameter | 10 mm |
| Maximum working load | 340 kg |
| Breaking load | 851 kg |
For versions with a cam cleat, the stated loads are limited by the strength of the cleat.