2020 Ronstan Sailboat Hardware Catalogue - Page 14



SPORTS BLOCKS
12
Series 25 & 30 Utility
SERIES 25
RF571
RF572
RF2332
RF573
RF575
RF575
Sheave profile
SERIES 30
RF280
RF681
RF469A
RF469A
Cheek plates twist to
open block
RF469
RF470
RF443
RF467
Simple, versatile and economical blocks
that have many uses.
Vang, cunningham and trapeze retriever
systems on dinghies.
Lightweight, durable construction.
Leech line tackles and bunk adjusters
on larger yachts.
Stainless steel cheeks and acetal sheaves
ensure long service life with virtually no
maintenance required.
PRODUCT No.
DESCRIPTION
SHEAVE
DIAM.
mm
MAX.
ROPE
mm
Series 25 RF571
RF572
RF573
RF575
RF2332
All Purpose
Single block, loop head
Single block, becket, loop head
Single block, swivel shackle head
Single block, loop head, sheave suits flat webbing
Single block, swivel ring head
25
25
25
25
25
6
6
6
6*
Series 30 RF280
RF443
RF467
RF469
RF469A
RF470
RF567
RF681
All Purpose
Single block, loop head
Single block, swivel ring head
Single block, swivel shackle head
Single block, ferrule eye head
Single block, snatch
Single block, becket, ferrule eye head
Single block, becket, swivel shackle head
Single block, becket, loop head
30
30
30
30
30
30
30
30
* Sheave designed to take 5.5mm flat webbing.
PIN/EYE
DIAM. M.W.L.
mm
kg
RF567
Sheaves: UV stabilised acetal.
Cheeks & head fittings:
Grade 316 stainless steel.
B.L.
kg
WEIGHT
g
SHEAVE
DIAM.
in.
MAX.
ROPE
in.
300
300
150
300
300
600
600
300
600
600
15
20
20
20
20
1
1
1
1
1
1/4
1/4
1/4
1/4*
6
4
10
10
8
10
10
10
10
10
10
8
13
5
10
10
10
5
-
300
250
250
300
300
300
250
300
600
500
500
600
600
600
500
600
20
44
50
40
40
45
55
25
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
PIN/EYE
DIAM. M.W.L.
in.
lb
B.L.
lb
WEIGHT
oz
1/4
5/32
3/8
3/8
660
660
330
660
660
1320
1320
660
1320
1320
0.5
0.7
0.7
0.7
0.7
5/16
3/8
3/8
3/8
3/8
3/8
3/8
5/16
1/2
3/16
3/8
3/8
3/8
3/16
-
660
550
550
660
660
660
550
660
1320
1100
1100
1320
1320
1320
1100
1320
0.7
1.6
1.8
1.4
1.4
1.6
1.9
0.9

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