HARKEN CARBO BLOCK DOUBLE RATCHAMATIC 57MM
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)
10:1