2025 Ronstan Marine Catalogue - Catalog - Page 56
KEELBOAT BLOCKS
Series 60 Core
54
RF64100
RF64100AW
RF64110
RF64130
ALUMINIUM SHEAVE
20mm
25/32”
14mm (9/16”)
14mm (9/16”)
RF64108
RF64108AW
RF64202
RF618T
RF324
RF2429-08
Suits single & 昀椀ddle
shackle head blocks
RF64140 stand-up block features a strong precision
cast padeye base, and has a swivel head post to
allow full articulation and rotation.
RF64110 & RF64130 removable M8 (5/16”) becket pin
suits pre-spliced lines.
RF64130 cleating angle is adjustable and is fitted with
a high performance C-Cleat™ and fairlead for secure
and easy cleating.
RF64103 features a versatile trunnion snap shackle
that provides quick & simple attachment and
removal, and has 360° rotation with side-to-side
articulation.
PRODUCT No.
RF64103
ALUMINIUM SHEAVE
RF617A
6mm (1/4”) pin suits single
& 昀椀ddle shackle head blocks
Mainsheet, halyard and spinnaker sheet applications
on boats to 11m (36ft).
Shackle, post & hub: Grade 316 stainless steel.
Padeye & snap shackle: Grade 15-5PH
stainless steel.
Various control line applications on
larger yachts.
BB sheaves: UV stabilised acetal.
Pins: Grade 2205 stainless steel
(RF64108, RF64108A, RF64202).
SP sheaves: Anodised aluminium.
Cleat: Fibre reinforced composite.
Cheek plates & cleat arms: Aluminium alloy.
Ball bearings: High compression strength acetal.
DESCRIPTION
SHEAVE MAX. MAX. PIN
DIAM. ROPE WIRE DIAM. M.W.L.
mm
mm mm mm
kg
B.L. WEIGHT
kg
g
SHEAVE MAX. MAX. PIN
DIAM. ROPE WIRE DIAM. M.W.L.
in
in
in
in
lb
B.L. WEIGHT
lb
oz
Ball Bearing
RF618T
Twist shackle body, suits RF64202 & RF74202, for 90° attachment
RF64100
Single block, universal head
RF64103
Single block, trunnion snap shackle head
RF64108
Halyard block, screw pin with roller head
RF64110
Single block, becket, universal head
RF64130
Single block, becket, cleat, universal head
RF64202
Double block, non-swivel shackle head
60
60
60
60
60
60
12
12
12
12
12
12
-
6
8
6
6
-
1000
1000
1000*1
1000
350*2
1000
40
235
285
186
275
450
390
2 3/8
2 3/8
2 3/8
2 3/8
2 3/8
2 3/8
1/2
1/2
1/2
1/2
1/2
1/2
-
1/4
5/16
1/4
1/4
-
2200
2200
2200*1
2200
770*2
2200
Special Purpose - Aluminium Sheave
RF64100AW
Single block, rope/wire sheave, swivel shackle head
RF64108AW
Halyard block, rope/wire sheave, screw pin, roller head
60
60
12
12
5
5
6
8
1000 2000 292
1000*1 2000*1 212
2 3/8
2 3/8
1/2
1/2
3/16
3/16
1/4
5/16
2200 4410 10.3
2200*1 4410*1 7.5
2000
2000
2000*1
2000
2000
2000
*1 Full block rated load can only be achieved with uniformly distributed load across full length of screw pin. i.e. 14mm (9/16”) diameter mast collar post or 14mm (9/16”) wide mast collar plate/tang.
*2 MWL based on maximum allowable line load through cleat of 175kg (385lb), 2:1 purchase.
1.4
4410 8.3
4410 10.1
4410*1 6.6
4410 9.7
4410 15.9
4410 13.8
