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RF25109 Series 20 BB OrbitBlock™ Lashing Head
User Instructions
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3.0 Care & Maintenance
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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
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be lashed with the lashing, strop or link passing through the
hub.
The lashing must be passed down through the head, out through the
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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
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(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) wound through multiple times. The
RF25109 Series 20 Orbit Block™ is supplied with 750mm (30") of
1.7mm (1/16") diam. covered Dyneema® lashing line.
For best results, the lashing must be attached to a mounting point
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with a smooth, well rounded profile.
Avoid attaching directly to fittings with sharp edges or rough
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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 fitting. Regularly inspect the lashing
for damage, if found replace immediately.
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Summary of Contents for Ronstan BB OrbitBlock RF25109 Series
- Page 1 • 4.0 Definitions • 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 •...
- Page 2 1.0 LASHING OPTIONS Attachment at 0° Attachment at 90° Line end attachment Large diameter object attachment (Must have at least 2 strands) 1.1 Attachment at 0° (in-line) 1.1.1 Pass the 1.1.2 Pass the 1.1.3 Pass lashing 1.1.4 Pass lashing line 1.1.5 Finish lashing line down lashing line...
- Page 3 lashing line down lashing line in line over the fixing through the hub, in through lashing with through the head, through the point. Pass back opposite cheek and up appropriate knot, out through the opposite cheek down through the through the head. Repeat splice or cheek and and back up...
- Page 4 Through Hub Becket Lashing Used Lashing Used as Becket and Sheet Line as Becket For sheets up to 3mm For sheets up to 3mm (1/8”). It is possible for the (1/8”). For sheets 4mm lashing to be used as the becket and sheet line (5/32”) to 6mm also.
- Page 5 2.2.1 Pass the line down 2.2.2 Loop under the 2.2.3 Repeat 2.2.4 If another loop 2.2.5 Finish through the head, out bottom of the block step 2.2.2 if is required to meet lashing with through the rear side and again though the more than one breaking load, loop appropriate knot,...
- Page 6 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. •...
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