2025 Ronstan Marine Catalogue - Catalog - Page 9
SPORTS BLOCKS
Series 15 UTILITY
7
RF15100
RF15202
RF15101
RF15302
RF15141
RF15000
4.7mm
(3/16”)
2 x 4mm
(3/16”)
RF15180
RF15111
RF15212
RF15151
RF15312
RF15151A
2 x 4mm
(5/32”)
RF15107
RF15711
Precision moulded acetal sheave running
on stainless steel ball bearings provides high
performance and low friction.
Single loop head blocks include an O-ring to separate
running line from head lashing or fixing.
RF15151 & RF15151A cheek blocks feature lateral
supports for improved mounting stability.
PRODUCT No.
Ball Bearing
RF15000
RF15100
RF15101
RF15107
RF15111
RF15141
RF15151
RF15151A
RF15171
RF15174
RF15180
RF15202
RF15212
RF15302
RF15312
RF15711
RF133
RF613S
RF633S
RF1851
RF15174
2 x 4mm (5/32”)
4 x 4mm (5/32”)
RF613S - Suits RF15100
RF633S - Suits double and triple blocks
RF133
Suits loop head single blocks
RF1851
Suits loop head single blocks
RF15174 pivoting lead block has 4-point
fastening for load distribution and low profile.
Can be mounted without disassembly.
Dinghy control lines.
Vangs, cunninghams and tweakers.
Shock cord tensioning systems.
RF15711 exit block has a formed single piece housing
for maximum strength and minimal
rope wear.
Sheaves: UV stabilised acetal.
Ball bearings: Stainless steel.
Cheeks & head fittings: Grade 316 stainless steel.
RF15711 exit block has a flush rivet to
minimise cutout dimensions and facilitate installation.
DESCRIPTION
Sheave, captive BB, 7mm (9/32”) width
Single block, swivel shackle head
Single block, loop head
Single block, suits 10mm (3/8”) webbing
Single block, becket, loop head
Stand-up block
Cheek block
Cheek block, single mounting
Upright lead block
Pivoting lead block
Single block, swivel hook head
Double block, loop head
Double block, becket, loop head
Triple block, loop head
Triple block, becket, loop head
Exit block
Saddle, 9mm (3/8”) internal clearance, suits 2 x 4mm
(3/16”) fasteners at 27mm (1 1/16”) centres
Shackle, slotted pin, suits RF15100
Shackle, slotted pin, suits double & triple blocks
Shackle, coined pin head, suits loop head single blocks
4.6mm
(3/16”)
RF15171
2 x 4mm (5/32”)
Smallest and lightest ball bearing block
available.
1 x 4mm
(5/32”)
SHEAVE
DIAM.
mm
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
MAX. MAX. PIN
ROPE WIRE DIAM. M.W.L.
mm mm mm
kg
5
5
5
4
5
5
5
5
5
5
5
5
5
5
5
5
-
B.L. WEIGHT
kg
g
SHEAVE
DIAM.
in.
MAX. MAX. PIN
ROPE WIRE DIAM. M.W.L.
in.
in.
in.
lb
B.L.
lb
WEIGHT
oz
3
-
120
120
120
120
120
120
120
120
120
120
100
240
240
360
360
120
400
550
450
550
550
550
360
550
350
200
700
700
850
850
550
2
11
7
9.5
9
10
9
9
9
16
13
23
24
28
30
14
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
3/16
3/16
3/16
5/32
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
-
1/8
-
260
260
260
260
260
260
260
260
260
260
220
530
530
790
790
260
880
1210
990
1210
1210
1210
790
1210
770
440
1540
1540
1870
1870
1210
0.1
0.7
0.3
0.3
0.3
0.4
0.3
0.3
0.3
0.6
0.4
0.8
0.9
1.0
1.0
0.5
-
-
-
-
-
-
2
-
-
-
-
-
-
0.1
-
-
-
3
4
3
-
-
3
5
2
-
-
-
1/8
5/32
1/8
-
-
0.1
0.2
0.1
