Ronstan BB OrbitBlock RF25109 Series User Instructions Download Page 5

 

2.2.1 Pass the line down 

through the head, out 

through the rear side 

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 

fixing 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 bow line 

or splice. 

2.3 Single Line Used as Becket & Sheet Line - for Sheets up to 3mm (1/8") 

 

2.3.1 Pass the line in 

through a cheek, up 

through the head, around 

the fixing point, back 

down through the head 

and out through the 

opposite cheek. 

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 miximum B.L. of 550kg 

(1210lb). Knots, splices, stitching, etc. 

will generally have a lower breaking 

load than the rope itself. 

  

 

Summary of Contents for BB OrbitBlock RF25109 Series

Page 1: ...embly 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 prov...

Page 2: ...s the lashing line down through the head and out through the cheek 1 1 3 Pass lashing line in through the opposite cheek and back up through the head 1 1 4 Pass lashing line around fixing point Repeat steps 1 1 1 to 1 1 3 if more than one strand is required to meet desired breaking load 1 1 5 Finish lashing with appropriate knot splice or whipping 1 2 Attachment at 90 transverse 1 2 1 Pass the 1 2...

Page 3: ...ack up through the head 1 3 4 To finish attachment tie a bow line above the block Note Knot must be a non slipping non tightening knot 1 3 5 For the ultimate clean finish use an eye splice 1 4 Large Diameter Object Attachment 1 4 1 1 4 2 1 4 3 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 th...

Page 4: ...eets up to 3mm 1 8 It is possible for the lashing to be used as the becket and sheet line also 2 1 Through Hub Becket for sheets up to 3mm 1 8 2 1 1 Attach block to fixing point as per lashing option 1 1 to 1 4 2 1 2 Pass the sheet end through the hub and secure with a bowline or eye splice 2 2 Lashing Used as Becket for Sheet Lines 4mm 5 32 to 6mm 1 4 ...

Page 5: ...iate knot splice or whipping Attach the sheet to the becket loops using a bow line or splice 2 3 Single Line Used as Becket Sheet Line for Sheets up to 3mm 1 8 2 3 1 Pass the line in through a cheek up through the head around the fixing point back down through the head and out through the opposite cheek 2 3 2 Pass both ends through the hub in opposite directions 2 3 3 Finish lashing with appropria...

Page 6: ...ve 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 Oil petrochemical bas...

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