2025 Ronstan Marine Catalogue - Catalog - Page 6
FEATURES & INFORMATION
Sports Blocks
4
Stage 2
Stage 1
2-stage bearing system
Triple bearing race (S40)
Adjustable cleat arms
Ratchet block auto/manual models
Ratchet block auto engagement
Lashing or soft shackle option
Ratchet block holding power
ORBIT BLOCKS
™
Ultimate Performance
Awesome Holding Power
Ball Bearing Orbit Blocks™ have been engineered to achieve the highest
possible strength-to-weight ratio, using composite reinforced polymer
materials and sophisticated bearing systems.
Multiple gripping faces machined into our ratchet block sheaves work
in conjunction with our unique cross-hole geometry, delivering up to
20:1 holding power to resist slipping of the loaded line while minimising
rope wear. Ball bearings ensure minimum friction under load and a free
running sheave when the ratchet is disengaged.
The new Series 40 Orbit Blocks™ are strong enough for applications that
historically required a larger block and light enough to compete on any
racecourse. The 2-stage ball bearing system remains highly e昀케cient under
heavy static or dynamic loads, with a clever design that e昀昀ectively eliminates
the friction-inducing skidding or deformation of ball bearings which
commonly impact blocks in this size range.
Orbit Blocks™ are available with swivel heads, Dyneema® link heads, or as
lashing blocks. The SK78 Dyneema® link provided with link head blocks is
easily 昀椀tted and retained securely by a moulded retainer clip. The 昀氀exible link
allows limited articulation in a 0° or 90° orientation, while swivel head models
with stainless steel shackles provide full rotation and maximum durability.
Orbit Blocks™ are 昀椀tted with our carbon-昀椀bre reinforced C-Cleat™ for secure
rope holding with low entry and exit e昀昀orts, and fairleads for fast action from
any angle. Cleat arms have a wide range of adjustment and calibration marks
for setting your preferred cleating angle.
Control switches are located on both sides of the block to remain
accessible wherever the block is 昀椀tted. In auto mode, the ratchet
mechanism engages when load is applied but disengages when released
to let the sheet run out freely – ideal for gybing asymmetric spinnakers.
In manual mode, the switch is used to set up the block with ratchet either
on or o昀昀 as required.
