2025 Ronstan Marine Catalogue - Catalog - Page 37
SPORTS BLOCKS
Series 55 Orbit
35
© Paul Wyeth
RF56120
RF56130
Adjustable
cleat arms
Load sensing
auto ratchet
RF150
4.8mm (3/16”) pin
Swivel shackle head for unlimited block rotation.
RF56120 & RF56130 - Composite C-Cleat™
and fairlead.
Dinghy mainsheet systems.
Spinnaker sheets on dinghies – especially
modern asymmetric classes.
Sheave: Anodised aluminium.
Spinnaker sheets on sportsboats and small
keelboats (lateral lead blocks).
Frame/cheeks: Toughened,
glass fibre reinforced nylon.
Ball bearings: High compression strength acetal.
Control line applications on larger yachts.
PRODUCT No.
DESCRIPTION
Ball Bearing
RF56120
Single block, adjustable cleat, auto, swivel shackle head
RF56130
Single block, becket, adjustable cleat, auto, swivel shackle head
SHEAVE
DIAM.
mm
MAX.
ROPE
mm
55
55
10
10
PIN
DIAM. M.W.L.
mm
kg
5
5
B.L. WEIGHT
kg
g
175*2 750
250*1&2 750
*1 Total block load. Load on becket not to exceed block load. i.e. MWL 250kg (550lb), BL 750kg (1650lb). Suitable for 2:1 system at rated block load.
*2 MWL based on maximum allowable line load through cleat of 175kg (385lb).
204
209
SHEAVE
DIAM.
in.
MAX.
ROPE
in.
2 5/32
2 5/32
3/8
3/8
PIN
DIAM. M.W.L.
in.
lb
3/16
3/16
B.L. WEIGHT
lb
oz
385*2 1650
550*1&2 1650
7.2
7.4
