2025 Ronstan Marine Catalogue - Catalog - Page 25
SPORTS BLOCKS
Series 40 Utility
23
RF40500
RF40140
RF40510
RF40520
RF40171
RF40530
RF44108
RF6170
RF44000
2 x 5mm (3/16”)
6mm (7/32”)
RF150
4.8mm (3/16”) pin, suits single
and fiddle blocks
RF41010
snap-in keyhole becket
pin
Snap shackle adapters suit single & fiddle blocks.
Ball bearings: Acetal.
Low profile stand-up block has swivel head post to
allow full articulation and rotation.
BB sheaves: UV stabilised acetal
(RF44000 & RF44108 Torlon® ball bearings).
Mainsheet, halyard, vang and spinnaker control lines
on off-the-beach catamarans, one design classes and
sportsboats up to 8m (26ft).
SP sheaves: Self-lubricating Nylatron®.
PRODUCT No.
DESCRIPTION
Ball Bearing
RF40140
Stand-up block, swivel shackle head
RF40171
Upright lead block
RF44000
Sheave, alloy, Torlon® balls
Single block, removable loop head, alloy sheave,
RF44108
Torlon® balls
RF40500
Fiddle block, universal head
RF40510
Fiddle block, becket, universal head
RF40520
Fiddle block, adjustable cleat, universal head
RF40530
Fiddle block, becket, adjustable cleat, universal head
Accessories
RF6170
Snap shackle head adapter
* Line load through cleat not to exceed 125kg (275lb).
Cheeks: Impact modified, fibre
reinforced and UV stabilised nylon.
Load straps & head fittings:
Grade 316 stainless steel.
SHEAVE MAX. MAX. PIN
DIAM. ROPE WIRE DIAM. M.W.L. B.L. WEIGHT
mm
mm mm mm
kg
kg
g
SHEAVE
DIAM.
in.
MAX. MAX. PIN
ROPE WIRE DIAM. M.W.L. B.L. WEIGHT
in.
in.
in.
lb
lb
oz
40
40
40
10
10
6
-
-
350 800
350 1000
-
71
60
15
1 9/16
1 9/16
1 9/16
3/8
3/8
1/4
-
-
770 1760
770 2200
-
2.5
2.1
0.5
40
6
-
6
240 1100
60
1 9/16
1/4
-
7/32
530 2430
2.1
40 + 24
40 + 24
40 + 24
40 + 24
8
8
8
8
-
5
5
5
5
350
350
350*
350*
1000
1000
1000
1000
90
97
156
163
1 9/16 + 15/16
1 9/16 + 15/16
1 9/16 + 15/16
1 9/16 + 15/16
5/16
5/16
5/16
5/16
-
3/16
3/16
3/16
3/16
770
770
770
770*
2200
2200
2200
2200
3.2
3.4
5.5
5.7
-
-
-
5
500 1000
49
-
-
-
3/16
1100 2200
1.7
