2025 Ronstan Marine Catalogue - Catalog - Page 22
SPORTS BLOCKS
Series 40 Orbit
20
© Shirley Wodson
RF45101
RF45501
RF45521
RF9003-07
RF615
4mm (5/32”) pin
Becket link
2-stage ball bearing system.
RF45521 Composite C-Cleat™ and fairlead.
Halyard, vang and backstay applications on boats to
8m (26ft).
Stage 2 bearing: Glass fibre reinforced, MoS2
impregnated nylon.
Use RF9003-07 Dyneema® as becket link.
Control line applications on larger yachts.
Mainsheet systems and spinnaker sheets on dinghies
to 5m (16ft).
Sheave: Carbon fibre reinforced nylon.
Frame/cheeks: Toughened, glass fibre reinforced
nylon.
PRODUCT No.
DESCRIPTION
Ball Bearing
RF45101
Single block, Dyneema® link head
RF45501
Fiddle block*3, Dyneema® link head
RF45521
Fiddle block*3, adjustable cleat, Dyneema® link head
Accessories
RF9003-07
Soft link: UV stabilised, multi-strand
SK78 Dyneema®.
Ball bearings: High compression strength acetal.
S40 single & 昀椀ddle Orbit Blocks™, head and becket link
SHEAVE
DIAM.
mm
MAX.
ROPE
mm
PIN
DIAM.
mm
40
40 + 22
40 + 22
9
9
9
-
RF45101, RF45501, RF45521
*1 Total block load. Becket MWL 125kg (275lb), BL 250kg (550lb). Suitable for 3:1 system at rated block load.
*2 Line load through cleat not to exceed 125kg (275lb).
*3 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.
M.W.L.
kg
325
325*1&2
325*1&2
B.L. WEIGHT
kg
g
700
700
700
33
47
108
SHEAVE
DIAM.
in.
1 9/16
1 9/16 + 7/8
1 9/16 + 7/8
MAX.
ROPE
in.
5/16
5/16
5/16
PIN
DIAM. M.W.L.
in.
lb
-
B.L.
lb
715
1540
715*1&2 1540
715*1&2 1540
WEIGHT
oz
1.2
1.7
3.8
