2025 Ronstan Marine Catalogue - Catalog - Page 13
SPORTS BLOCKS
Series 20 Utility
11
RF20151
2 x 4mm (5/32”)
RF20151A
RF20184
2 x 4mm (5/32”)
RF25151
6mm (1/4”)
RF20171
RF20174
RF20180
x
6”) ick
(3/1 2”) th
m
5m (5/3
mm
3.8
2 x 4mm (5/32”)
m
10m/8”)
(3
2 x 4mm (5/32”)
RF20175
RF25711
RF25711HL
RF20000HL
2 x 4mm (5/32”)
8mm (5/16”)
2 x 4mm (5/32”)
RF613S
3mm (1/8”) pin, suits RF20100
2 x 4mm (5/32”)
RF615
4mm (5/32”) pin, suits double & triple blocks
Cheek blocks RF20151 and RF25151 have
through-hub mounting for maximum strength.
Cheek block RF20151A suits pop
rivet mounting.
RF20180 features a low profile swivelling hook for
quick and easy attachment. Suits rope,
stainless steel and webbing attachment points.
PRODUCT No.
DESCRIPTION
Ball Bearing
RF20151
RF20151A
RF20171
RF20174
RF20175
RF20180
RF20184
RF25151
RF25711*2
Cheek block
Cheek block, rivet mount
Upright lead block
Pivoting lead block
Pivoting lead block, cleat
Single block, swivel hook head
Single block, loop mount
Cheek block
Exit block
High Grade Stainless Steel Sheave
RF25711HL*2
Exit block HHL
Nylatron
RF20000HL
RF25711 & RF25711HL exit blocks have a formed
single piece housing for maximum strength and
minimal rope wear.
BB Sheave: UV stabilised acetal, ball bearings: Grade
304 stainless steel.
Dinghy control lines and vangs.
HHL sheave and bearing race: Grade 2205 stainless
steel, ball bearings: Grade 304 stainless steel.
SP sheave: Self-lubricating Nylatron®.
Cunninghams.
Traveller controls.
Housing, load straps, head fittings & hook (RF20180):
Grade 316 stainless steel
Exit blocks minimise friction in lines passing through
the deck or exiting masts and booms.
SHEAVE
DIAM.
mm
MAX.
ROPE
mm
MAX.
WIRE
mm
M.W.L.
kg
B.L.
kg
WEIGHT
g
SHEAVE
DIAM.
in.
MAX.
ROPE
in.
MAX.
WIRE
in.
M.W.L.
lb
B.L.
lb
WEIGHT
oz
20
20
20
20
20
20
20
20
20
6
6
6
6
6
6
6
6
6
-
250
200
250
250
150*1
100
250
250
250
550
550
550
550
300
200
550
550
1000
14
17
18
30
79
21
22
8
18
3/4
3/4
3/4
3/4
3/4
3/4
3/4
3/4
3/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
-
550
440
550
550
330*1
220
550
550
550
1210
1210
1210
1210
660
440
1210
1210
2200
0.5
0.6
0.6
1.1
2.8
0.7
0.8
0.3
0.6
20
6
-
300
1100
22
3/4
1/4
-
660
2430
0.8
20.0
6
3
-
-
2
3/4
1/4
1/8
-
-
0.1
®
Sheave, Nylatron®
*1 Line load through cleat not to exceed 125kg (275lb).
*2 Refer to the SUPPORT page at www.ronstan.com for mounting template.
