2025 Ronstan Marine Catalogue - Catalog - Page 16
SPORTS BLOCKS
Series 30 Orbit
14
RF35100
RF35109HL
RF35100D
Ideal for high load applications
such as halyards, cascading vangs,
backstays, outhauls
and cunningham systems
RF35202
RF35302
RF35212
RF35312
RF35101
RF35101D
Block must be lashed through
central hub. MWL and BL is
dependent on the strength of
the lashing.
RF9004-11
Suits single blocks as a
lashing strop.
BL reduced to 1300kg
(2860lb) for RF35109HL
RF614
Use with RF9004-09
for attachment option for
RF35109HL. BL reduced
to 1300kg (2860lb)
RF35101 and RF35100 - Ultra-low profile
through-sheave becket.
Ball bearing blocks have a 2-stage ball
bearing system.
RF35101 accepts RF1850S shackle in both
orientations to create a conventional loop
top block.
SP versions feature a Nylatron® sheave
suitable for both rope and wire.
RF134
RF134A (countersunk holes)
HHL versions features class-leading dynamic and
static load ratings for a 30mm block. Refer
www.ronstan.com for lashing instructions.
Mainsheet systems and spinnaker sheets
on dinghies to 5m (16ft).
Halyard, vang and backstay applications
on boats to 5m (16ft).
Control line applications on larger yachts.
SHEAVE MAX.
DIAM. ROPE
mm
mm
PIN
DIAM. M.W.L.
mm
kg
RF1850S
Suits RF35101 in either
direction BL reduced to
500kg (1100lb)
RF323
Suits RF35100,
RF35100D
BB sheaves and balls: High compression strength
acetal.
SP sheaves: Self-lubricating Nylatron®.
HHL sheave and bearing race: Grade 2205 stainless
steel with Grade 304 stainless steel ball bearings
Frame/cheeks: Glass fibre reinforced nylon.
Soft link: UV stabilised, multi-strand SK78 Dyneema®.
B.L.
kg
WEIGHT
g
SHEAVE
DIAM.
in.
MAX.
ROPE
in.
PIN
DIAM. M.W.L.
in.
lb
600
600
900
900
1100
1100
32
22
56
57
79
81
1 3/16
1 3/16
1 3/16
1 3/16
1 3/16
1 3/16
5/16
5/16
5/16
5/16
5/16
5/16
5/32
-
PRODUCT No.
DESCRIPTION
Ball Bearing
RF35100
RF35101
RF35202
RF35212
RF35302
RF35312
Single block, becket hub, swivel shackle head
Single block, becket hub, lashing head
Double block, non-swivel shackle head
Double block, becket*1, non-swivel shackle head
Triple block, non-swivel shackle head
Triple block, becket*1, non-swivel shackle head
30
30
30
30
30
30
8
8
8
8
8
8
4
-
300
300
450
450*2
550
550*3
High Grade Stainless Steel Sheave
RF35109HL
Single block HHL, lashing hub and becket option
30
8
-
550*4 1650*4
42
1 3/16
5/16
-
Special Purpose - Nylatron® Sheave
RF35100D
Single block, becket hub, swivel shackle head
RF35101D
Single block, becket hub, lashing head
30
30
8
8
4
-
300
300
31
21
1 3/16
1 3/16
5/16
5/16
5/32
-
*1 Becket suits up to 6mm (1/4”) line. For lines above 6mm (1/4”) use an additional Dyneema® link (sold separately)
*2 Total block load. Load on becket not to exceed 25% of block load. i.e. MWL 140kg (310lb), BL 280kg (610lb). Suitable for 4:1 system at rated block load.
*3 Total block load. Load on becket not to exceed 25% of block load. i.e. MWL 140kg (310lb), BL 280kg (610lb). Suitable for 6:1 system at rated block load.
*4 Both the MWL and BL are dependent on the strength of the line used to lash the block through the central hub.
600
600
660
660
990
990*2
1210
1210*3
B.L.
lb
WEIGHT
oz
1320
1320
1980
1980
2430
2430
1.1
0.8
2.0
2.0
2.8
2.9
1210*4 3630*4
660
660
1320
1320
1.5
1.1
0.7
