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USER INSTRUCTIONS
•
Method B:
(Diagrams 2.3B)
If using a pre-spliced sheet, secure with a cow
hitch through both loops of the Link.
3.0
(Diagram 3.0)
Adjustment of
cleat arm angle
3.0.1
Loosen the screw at the
centre of the cleat arm
on each side of the block
(approximately 1 ½ turns).
3.0.2
Adjust the cleat arms to the required angle. The
cleating angle can be adjusted from 0 degrees (when
the sheet is coming out of the block at right angles to
the centre line of the block) to 60 degrees (40 degrees
on RT triple, becket & cleat). The cleat arm angle is
indicated by the number aligned with the centre line of
the block.
3.0.3
Re-tighten the screw at the centre of the cleat arm on
each side of the block.
4.0
Stand-up kit
4.0.1
Use the method described in
1.3 above to set the link for 90°
(transverse) or 0° (in-line).
4.0.2
Turn the rubber boot inside out
and place it over the head of
the block so the link protrudes
through the small end.
4.0.3
(Diagram 4.0.3)
Pass the saddle through the link
in the required orientation.
4.0.4
Fix the saddle to the mounting
surface.
4.0.5
(Diagram 4.0.5)
If attaching the block to a fitting
that is already fixed in
place, roll up the bottom
half of the boot to simplify
attachment of the Link
and unroll it again when
finished.
5.0
(Diagram 5.0)
Ratchet mode
operation
• Some RT Orbit Blocks™ can be set to Automatic
mode or Manual mode to suit the application or user’s
preference. RT blocks with cleats are fully automatic
only.
5.1
Manual Mode
5.1.1
RT blocks leave the factory in Manual mode, with
the black MODE switches on both sides of the block
positioned away from the red ON/OFF knob.
5.1.2
Use the red ON/OFF knob to turn the ratchet ON or OFF.
5.2
Auto Mode
5.2.1
With the block in Manual mode, turn the ratchet off by
rotating the red ON/OFF knob to the OFF position.
5.2.2
Slide the black MODE switch firmly toward the red
ON/OFF knob until it locks into the recess in the knob.
Repeat with the MODE switch on the other side of the
block.
5.2.3
The block is now in Auto mode.
5.2.4
To return to Manual mode, slide the black MODE
switches on both sides of the block firmly away from
the red ON/OFF knob. Now use the red ON/OFF knob to
turn the ratchet ON and OFF.
6.0
(Diagram 6.0)
Cheek block alignment
• Cheek blocks must be properly aligned so that the
axis of the block bisects the angle between line entry
and exit, which must be approximately in the same
plane.
Misalignment or improper installation will reduce
the load capacity of the block.
7.0
(Diagram 7.0)
Upright Lead block alignment
• The Upright Lead block is designed to provide a 90
degree change in line direction, with line entry at 90
degrees to the base and line exit parallel to the base.
Any variation on these line angles will reduce the load
capacity of the block.
8.0
Care and maintenance
Dyneema
®
Link
• Ronstan BB and RT Orbit Blocks
™
feature a unique
Dyneema
®
Link head. Building on the latest trends
in grand prix dinghy and ocean racing, it replaces
the steel head post and shackle arrangement of
traditional blocks. Ronstan Dyneema
®
Links are
made from highest quality FSE Robline Ocean 3000
12 plait Dyneema
®
SK75 line, treated with S.Y.I.S.
impregnation for high resistance to abrasion and UV
protection. Dyneema
®
is a super strong polyethylene
fibre that offers maximum strength combined with
minimum weight. Dyneema
®
fibre’s high tenacity
allows it to match the strength of steel at one tenth
of the weight. It is more durable than polyester and
has a specific strength that is 40 percent greater
than aramid fibre.
• To receive the maximum performance benefit from
the Dyneema
®
Link, it must be used correctly,
inspected regularly and replaced when required.
• The Dyneema
®
Link must be attached to a mounting
point with a smooth, well rounded profile without
sharp edges or burrs. If in doubt, use a shackle
with a smooth surface between the Link and the
mounting point.
• The Dyneema
®
Link will eventually suffer
degradation from fatigue, wear and UV exposure.
Like all running and standing rigging, the Link should
be inspected regularly and replaced it if it shows
significant amount of wear or fibre damage, or as a
part of your regular boat maintenance program.
Orbit Blocks™
• Grit and sand will damage bearing systems.
Ronstan Orbit Blocks™ have a precisely engineered
bearing system that should be kept clean and free of
sand and grit to ensure optimum performance and
service life. Blocks, in particular the bearing areas,
should be flushed with fresh water regularly and
periodically cleaned with a mild detergent and water.
• Dry lubricants such as Ronstan Sailfast silicon
spray may be used to lubricate the bearing system
and ratchet controls.
Oil/petrochemical based
lubricants must not be used.
• Ronstan Orbit Blocks™ are designed and
manufactured for applications on sailboats. See
the Info section of the Ronstan web site and our
catalogue for important customer considerations
and warranty information.
9.0
Definitions
BB = Ball Bearing
RT = Ratchet
MWL = Maximum Working Load
BL = Breaking Load
Dyneema
®
is a trademark of Royal DSM NV.
DSM is the inventor and manufacturer of Dyneema
®
,
the world’s strongest fibre™. “Dyneema
®
”, and
“Dyneema
®
, the world’s strongest fibre™” are
trademark(s) (applications) owned by Royal DSM NV.
4.0.3
4.0.5
EQ
UA
L
EQUAL
6.0
EQ
UA
L
EQUAL
7.0
3.0
2.3B
ON
OFF
AUTO
MANUAL
5.0
