2025 Ronstan Marine Catalogue - Catalog - Page 34
SPORTS BLOCKS
Series 55 Orbit
32
© Seascape
RF55501
RF55521
Removable Dyneema® link &
retainer clip
RF9004-09
Adjustable cleat arms
RF55521 - Composite
C-Cleat™ and fairlead.
Stage 2 bearing: Carbon fibre reinforced nylon.
Sheave: Carbon fibre reinforced nylon.
Frame/cheeks: Toughened, glass fibre
reinforced nylon.
Ball bearings: High compression
strength acetal.
Soft link: UV stabilised, multi-strand
SK78 Dyneema®.
Becket link
PRODUCT No.
DESCRIPTION
Ball Bearing
RF55501
Fiddle block*1, Dyneema® link head
RF55521
Fiddle block*1, adjustable cleat, Dyneema® link head
Accessories
RF9003-09
Use as head and becket link
SHEAVE
DIAM.
mm
MAX.
ROPE
mm
55 + 35
55 + 35
10
10
PIN
DIAM. M.W.L.
mm
kg
-
Blocks Suited
RF55501, RF55521
*1 Small 昀椀ddle block sheave has a high load full contact bearing (i.e. not ball bearing). Main sheave has 2-stage, ball bearing.
*2 Line load through cleat not to exceed 175kg (385lb).
500
500*2
B.L.
kg
WEIGHT
g
SHEAVE
DIAM.
in.
MAX.
ROPE
in.
1000
1000
95
232
2 5/32 + 1 3/8
2 5/32 + 1 3/8
3/8
3/8
PIN
DIAM. M.W.L.
in.
lb
-
B.L.
lb
1100 2200
1100*2 2200
WEIGHT
oz
3.4
8.1
