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.

Sheave Ø (mm)
57 mm

Sheave Ø (in)
2 1/4 in

Length (mm)
116 mm

Length (in)
4 9/16 in

Weight (g)
204 g

Weight (oz)
7.2 oz

Shackle pin Ø (mm)
6 mm

Shackle pin Ø (in)
1/4 in

Maximum line Ø (mm)
10 mm

Maximum line Ø (in)
3/8 in

Maximum working load (kg)
340 kg

Maximum working load (lb)
750 lb

Breaking load (kg)
851 kg

Breaking load (lb)
1875 lb

Holding power w/180 degree wrap 50 lb (23 kg)