2020 Ronstan Sailboat Hardware Catalogue - Page 37



SPORTS BLOCKS
Series 55 Orbit
35
© Ana Lukanc / Seascape
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.
PRODUCT No.
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.
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
PIN
DIAM.
mm
55
55
10
10
5
5
M.W.L.
kg
B.L.
kg
250*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 Line load through cleat not to exceed 175kg (385lb).
WEIGHT
g
SHEAVE
DIAM.
in.
MAX.
ROPE
in.
PIN
DIAM.
in.
M.W.L.
lb
204
209
2 5/32
2 5/32
3/8
3/8
3/16
3/16
550*2 1650
550*1&2 1650
B.L.
lb
WEIGHT
oz
7.2
7.4

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