2025 Ronstan Marine Catalogue - Catalog - Page 64
KEELBOAT BLOCKS
Series 100 Orbit
62
22mm (7/8”)
RF109100
RF109110
RF109200
RF109108
RF109000
RF109140
RF109109
RF109209
RF109151
1 x 8mm (5/16”)
2 x 10mm (3/8”)
4 x 6mm (1/4”)*²
Suit use with RF2437-12 removable lashing padeye. See
page 209 for details.
RF328
RF2429-10*²
Suits RF109100 & RF109110
RF109110 removable becket pin allows lines
to be spliced prior to fitting.
Permanent backstay systems on boats to
14m (46ft).
Needle rollers: Torlon®.
Primary mainsheet, halyard and spinnaker systems on
boats to 15m (50ft).
General control line and lead block applications on
larger yachts.
Forged shackle & head post:
Grade 17-4PH stainless steel.
Secondary mainsheet, vang blocks on boats
to 18m (60ft).
Cheek plates: Fully machined aluminium alloy.
PRODUCT No.
DESCRIPTION
Ball Bearing
RF109000
RF109100
RF109108
RF109109
RF109110
RF109140
RF109151
RF109200
RF109209
Sheave with balls & rollers
Single block, universal head
Halyard block, screw pin head
Strop block
Single block, becket , universal head
Stand-up block, 90 degree
Foot block, single
Double block, universal head
Strop block, double
*1 Bushed to 16mm (5/8”) diameter.
*2 A4-80 DIN7991 grade fasteners recommended to achieve BL
Ball bearings: High compression strength acetal.
Sheave: Aluminium alloy.
SHEAVE
DIAM.
mm
MAX.
ROPE
mm
PIN
DIAM.
mm
M.W.L.
kg
B.L.
kg
WEIGHT
g
SHEAVE
DIAM.
in
MAX.
ROPE
in
PIN
DIAM.
in
M.W.L.
lb
B.L.
lb
WEIGHT
oz
100
100
100
100
100
100
100
100
100
14
14
14
14
14
14
14
14
14
8
12*1
8
10
-
3000
3000
3000
3000
2000
3000
4250
4250
6500
6500
6500
6500
4000*²
6500
8500
8500
180
492
391
361
530
600
447
1030
732
4
4
4
4
4
4
4
4
4
9/16
9/16
9/16
9/16
9/16
9/16
9/16
9/16
9/16
5/16
1/2*1
5/16
13/32
-
6610
6610
6610
6610
4410
6610
9370
9370
14330
14330
14330
14330
8820*²
14330
18740
18740
6.3
17.4
13.8
12.8
18.7
21.2
15.8
36.3
25.9
