2020 Ronstan Sailboat Hardware Catalogue - Page 41



SPORTS BLOCKS
Series 75 Ultimate Ratchet
RF72100
RF72175
4 x 6mm (1/4”)
RF72174
Clicking
Crew
RF72000
Load
Low
lead in
Pivoting
4 x 6mm (1/4”)
Effective extruded hole design provides
up to 20:1 holding power.
High quality forged stainless steel shackle
and durable alloy cheek plates.
Sheave & cheek plates: Anodised aluminium.
On/Off switch is fitted to both sides of block
so it can be used on port or starboard side.
Switch can be removed from one side if required.
Dinghy mainsheet systems - when maximum
holding power is required.
Ratchet pawl: High strength Torlon®.
Unique On/Off switch mechanism can be
operated under load.
Spinnaker sheets on sportsboats and
small keelboats (lateral lead blocks).
Low friction ball bearing system.
PRODUCT No.
DESCRIPTION
Ball Bearing
RF72000
Sheave
RF72100
Single block, manual, swivel shackle head
RF72174
Pivoting low lead block
RF72175
Pivoting low lead block, cleat
Ball bearings: High compression strength acetal.
Swivel shackle head fitting:
Grade 316 stainless steel.
Control line applications on larger yachts.
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
75
75
75
75
12
12
12
12
7
-
420
420
420
2000
1370
1370
90
290
270
405
3
3
3
3
1/2
1/2
1/2
1/2
9/32
-
930
930
930
4410
3020
3020
3.2
5.7
9.5
14.3
39

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