2020 Ronstan Sailboat Hardware Catalogue - Page 55



KEELBOAT BLOCKS
Series 60 Core
RF64500
RF64520
20mm
3/4”
RF64503
53
RF64523
20mm
3/4”
RF64140
RF64108A
RF64251
RF64151
14mm
(9/16”)
RF64108A suits 14mm (9/16”)
mast collar post (not supplied)
2 x 8mm (5/16”)
RF617A
6mm (1/4”) pin suits single
& fiddle shackle head blocks
RF64520 & RF64523 cleating angle is adjustable
and are fitted with a high performance C-Cleat™ and
fairlead for secure and easy cleating.
Fiddle blocks incorporate an integrated becket
through the hub of the lower sheave, and are ideal
for creating simple vang and mainsheet systems
up to 4:1 on boats to 12m (40ft).
2 x 8mm (5/16”)
RF64108A mast base block has a removable clevis
pin to suit a 14mm (9/16”) wide mast collar post.*
Shackle, post & hub: Grade 316
stainless steel.
Universal head can be fixed at 0° or 90° or left free
to swivel, by using a 2.5mm hex key.
Pins: Grade 2205 stainless steel
(RF64108, RF64108A, RF64202).
BB sheaves: UV stabilised acetal.
Snap shackle & pad eye: Grade 15-5PH
investment cast stainless steel.
Cheek plates: Aluminium alloy.
Ball bearings: High compression strength acetal.
RF64503 & RF64523 features a versatile trunnion
snap shackle with rotation and
side-to-side articulation.
4 x 6mm (1/4”)
PRODUCT No.
DESCRIPTION
SHEAVE MAX.
DIAM. ROPE
mm
mm
Ball Bearing
RF64108A
RF64500
RF64503
RF64520
RF64523
RF64140
RF64151
RF64251
Mast base block, clevis pin head
Fiddle block, universal head
Fiddle block, snap shackle head
Fiddle block, cleat, universal head
Fiddle block, cleat, snap shackle head
Stand-up block, swivelling
Foot block, single
Foot block, double
60
60 + 30
60 + 30
60 + 30
60 + 30
60
60
60
12
12
12
12
12
12
12
12
Cleat: Fibre reinforced composite.
MAX.
WIRE
mm
PIN
DIAM.
mm
M.W.L.
kg
B.L.
kg
WEIGHT
g
SHEAVE
DIAM.
in
MAX.
ROPE
in
MAX.
WIRE
in
PIN
DIAM.
in
M.W.L.
lb
B.L.
lb
WEIGHT
oz
-
8
6
6
-
1000*1
1000
1000
1000*3
1000*3
1000
1000
1000*2
2000*1
2000
2000
2000
2000
2000
2000
2000*2
182
355
405
490
540
372
180
370
2 3/8
2 3/8+ 1 3/16
2 3/8+ 1 3/16
2 3/8+ 1 3/16
2 3/8+ 1 3/16
2 3/8
2 3/8
2 3/8
1/2
1/2
1/2
1/2
1/2
1/2
1/2
1/2
-
5/16
1/4
1/4
-
2200*1
2200
2200
2200*3
2200*3
2200
2200
2200*2
4410*1
4410
4410
4410
4410
4410
4410
4410*2
6.4
12.5
14.2
17.3
19.0
13.2
6.4
13.1
*1 Full block rated load can only be achieved with uniformly distributed load across full length of clevis pin. i.e. 14mm (9/16”) diameter mast collar post or 14mm (9/16”) wide mast collar plate/tang.
*2 Total block load. Maximum load on top sheave not to exceed 50% of total block load.
*3 Line load through cleat not to exceed 175kg (385lb).

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