2025 Ronstan Marine Catalogue - Catalog - Page 61
KEELBOAT BLOCKS
Series 75 Orbit
59
22mm (7/8”)
RF79100
RF79110
RF79200
RF79108
RF79109
RF79000
RF79140
RF79151
RF79209
RF79109A
1 x 8mm (5/16”)
1 x 10mm (3/8”)
RF324
2
RF2433-09*
Suits RF79100 & RF79110
Suits use with RF2437-12
removable lashing padeye. See
page 209 for details.
2
4 x 6mm (1/4”)*
Needle rollers: Torlon®.
RF79110 removable becket pin allows lines
to be spliced prior to fitting.
Permanent and running backstay systems
on boats to 12m (40ft).
Primary mainsheet, halyard and spinnaker
systems on boats to 14m (46ft).
General control line and lead block applications
on larger yachts.
Secondary mainsheet, vang blocks on
boats to 15m (50ft).
Cheek plates: Fully machined aluminium alloy.
PRODUCT No.
DESCRIPTION
Ball Bearing
RF79000
RF79100
RF79108
RF79109
RF79109A
RF79110
RF79140
RF79151
RF79200
RF79209
Sheave with balls & rollers
Single block, universal head
Halyard block, screw pin head
Strop block
Lashing block
Single block, becket , universal head
Stand-up block, 90 degree
Foot block, single
Double block, universal head
Strop block, double
*1 Bushed to 14mm (9/16”) diameter.
*2 A4-80 DIN7991 grade fasteners recommended to achieve BL
Ball bearings: High compression strength acetal.
(RF79109A: Torlon®)
Forged shackle & head post:
Grade 17-4PH stainless steel.
Sheave: Aluminium alloy.
SHEAVE
DIAM.
mm
MAX.
ROPE
mm
PIN
DIAM.
mm
M.W.L.
kg
75
75
75
75
80
75
75
75
75
75
14
14
14
14
14
14
14
14
14
14
8
10*1
8
8
-
2200
2200
2200
3100
2200
2000
2200
3250
3250
B.L.
kg
4500
4500
4500
7750
4500
4000*2
4500
6500
6500
WEIGHT
g
SHEAVE
DIAM.
in
MAX.
ROPE
in
PIN
DIAM.
in
M.W.L.
lb
B.L.
lb
WEIGHT
oz
95
340
251
226
310
354
480
269
575
414
3
3
3
3
3 1/8
3
3
3
3
3
9/16
9/16
9/16
9/16
9/16
9/16
9/16
9/16
9/16
9/16
5/16
3/8*1
5/16
5/16
-
4850
4850
4850
6830
4850
4400
4850
7170
7170
9920
9920
9920
17080
9920
8820*2
9920
14330
14330
3.4
12.0
8.9
8.0
10.9
12.5
16.9
9.5
20.3
14.6
