RF25109 Series 20 BB OrbitBlock™ Lashing Head
User Instructions
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1.0 Lashing Options
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2.0 Becket Options
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3.0 Care & Maintenance
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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.
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IMPORTANT: In order to meet breaking loads this block must
be lashed with the lashing, strop or link passing through the
hub.
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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.
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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) 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.
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For best results, the lashing must be attached to a mounting point
with a smooth, well rounded profile.
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Avoid attaching directly to fittings 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 fitting. Regularly inspect the lashing
for damage, if found replace immediately.
