Ronstan BB Orbit Block 20 Series User manual

RF25109HL Series 20 BB
Orbit Block™
Lashing Head User Instructions
Ronstan BB Orbit Blocks™ feature a unique Lashing 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.
IMPORTANT: In order to meet breaking loads this block must be lashed with the
lashing, strop or link passing through the hub.
The lashing must be passed down through the head, out through the cheek, through
the hub, back in through opposite cheek and back up and out through the head.
Repeat for lines, sizes that require more than one strand to meet load rating.
The Maximum Working Load and Breaking Load of the assembly (Block + Lashing) is generally limited by the strength of
the rope and the joining method. Knots, splices, stitching, etc. will generally have a lower Breaking Load than the rope
itself. It is possible to use up to 4mm (5/32”) lashing line for lashing the RF25109 running the lashing around as a single
strand, but a neater result with more secure knotting can be achieved by using the smaller line size provided (e.g. 1.7
- 2mm) passed through multiple times. The RF25109HL Series 20 Orbit Block™ is supplied with 750mm (30”) of 2mm
(3/32”) diam. single braid Dyneema® lashing line.
For best results, the lashing must be attached to a mounting point with a smooth, well rounded prole.
Avoid attaching directly to ttings with sharp edges or rough surfaces that may damage the lashing through abrasion
or point loading. For this situation use a shackle with a smooth surface between the lashing and the tting. Regularly
inspect the lashing for damage, if found replace immediately.
UsaGE InSTRUCTIONS
Orbit Block™
USER INFORMATION - RF25109HL Series 20 BB Orbit Block™ Lashing Head User Instructions Page 1.
1.0 LASHING OPTIONS
1.1 ATTACHMENT AT 0° (IN-LINE)
1.1.1 Pass the lashing
line down through
the head and out
through the cheek.
Attachment at 0°
*Must have at least 2 strands
1.1.2 Pass the lashing
line down through
the head and out
through the cheek.
Attachment at 90°
1.1.3 Pass lashing
line in through the
opposite cheek and
back up through the
head.
Line end attachment
1.1.4 Pass lashing line
around xing point.
Repeat steps 1.1.1 to 1.1.3
if more than one strand is
required to meet desired
breaking load.
Large diameter object attachment*
1.1.5 Finish lashing
with appropriate
knot, splice or
whipping.

RF25109HL Series 20 BB Orbit Block™
Lashing Head User Instructions (cont.)
USER INFORMATION - RF25109HL Series 20 BB Orbit Block™ Lashing Head User Instructions Page 2.
1.2 ATTACHMENT AT 90° (IN-LINE)
1.3 END ATTACHMENT
1.4 LARGE DIAMETER OBJECT ATTACHMENT
1.2.1 Pass the lashing
line down through
the head, out
through the cheek
and through the hub.
1.3.1 Pass the lashing
line down through
the head and out
through the cheek.
Where attachment to a large diameter object, wider than the head of the block, is required
(eg. a boom) the lashings must cross each other between the head of the block and the object.
Four strands of lashing are required to prevent the block twisting and creating a poor lead. The
strands from one side of the block should be to the outside and the strands from the other
side passing between them. See diagram 1.4.3.
1.2.2 Pass lashing
line in through the
opposite cheek and
back up through the
head.
1.3.2 Pass lashing
line through the hub.
1.2.3 Loop lashing
line over the xing
point. Pass back
down through the
head and out the
same cheek it last
passed through.
1.3.3 Pass lashing
line in through the
opposite cheek and
back up through the
head.
1.2.4 Pass lashing line
through the hub, in
through opposite cheek
and up through the head.
Repeat steps 1.2.1 to 1.2.3
if more than one strand is
required.
1.3.4 To nish attachment
tie a bowline above
the block. Note: Knot
must be a non-slipping
(non-tightening) knot.
1.2.5 Finish lashing
with appropriate
knot, splice or
whipping.
1.3.5 For the ultimate
clean nish use an
eye splice.
OR

RF25109HL Series 20 BB Orbit Block™
Lashing Head User Instructions (cont.)
USER INFORMATION - RF25109HL Series 20 BB Orbit Block™ Lashing Head User Instructions Page 3.
2.1 THROUGH-HUB BECKET - FOR SHEETS UP TO 3MM (1/8”)
Through Hub
Becket For sheets up
to 3mm (1/8”).
2.1.1 Attach block
to xing point as per
lashing option 1.1
to 1.4.
A through-hub can be used as a becket for up to 3mm (1/8”) lines. A take-o becket can be created with the lashing line for use with 4-6mm
(5/32” - 1/4”) sheet lines.
Lashing Used as
Becket For sheets
4mm (5/32”) to 6mm
(1/4”).
2.1.2 Pass the lashing line down
through the head and out
through the cheek.
Lashing Used as Becket and Sheet Line For sheets
up to 3mm (1/8”). It is possible for the lashing to be
used as the becket and sheet line also.
2.0 BECKET OPTIONS
2.2 LASHING USED AS BECKET - FOR SHEETS 4-6MM (5/32” - 1/4”)
2.2.1 Pass the lashing
line down through
the head, out
through the cheek
and through the hub.
2.2.2 Loop under the
bottom of the block
and again though the
hub.
2.2.3 Repeat step
2.2.2 if more than
one loop is required
to meet the desired
breaking load. Pass
line in through the far
side cheek and back
up through the head.
2.2.4 If another loop is required
to meet breaking load, loop
the line around xing point,
pass it back down through the
head, out through the near side
cheek, through the hub, back in
through the far side cheek and
back up through the head.
2.2.5 Finish lashing
with appropriate
knot, splice or
whipping. Attach the
sheet to the becket
loops using a bowline
or splice.
OR OR

RF25109HL Series 20 BB Orbit Block™
Lashing Head User Instructions (cont.)
USER INFORMATION - RF25109HL Series 20 BB Orbit Block™ Lashing Head User Instructions Page 4.
2.3 SINGLE LINE USED AS BECKET & SHEETS - FOR SHEETS UP TO 3MM (1/8”)
2.3.1 Pass the line in
through a cheek, up
through the head,
around the xing
point, back down
through the head
and out through the
opposite cheek.
LASHING ATTACHMENT
• To receive the maximum performance benet from the Lashings, they must be used correctly installed, inspected regularly and replaced
when required.
• Lashings must be attached to a mounting point with a smooth, well rounded prole without sharp edges or burrs. If in doubt, use a
shackle with a smooth surface between the Lashing and the mounting point.
• Lashings will eventually suer degradation from fatigue, wear and UV exposure. Like all running and standing rigging, Lashings should be
inspected as a part of your regular boat maintenance program and replaced if they show signicant wear or bre damage.
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 ushed 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. 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.
BB = Ball Bearing
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 bre™. “Dyneema®”, and “Dyneema®, the world’s
strongest bre™” are trademark(s) (applications) owned by Royal DSM NV.
2.3.2 Pass both ends
through the hub in
opposite directions.
2.3.3 Finish lashing with appropriate knot, splice or whipping. If a knot is
used it must not be a ‘slip’ knot, and the knot must be such that it pulls
equally on each line leading up to the hub. A bowline is ideal. Note: the
breaking load of the installed block is dependent on the breaking load of
the line; up to a maximum B.L. of 900kg (1980lb). Knots, splices, stitching,
etc. will generally have a lower breaking load than the rope itself.
3.0 CARE AND MAINTENANCE
4.0 DEFINITIONS