2020 Ronstan Sailboat Hardware Catalogue - Page 61



KEELBOAT BLOCKS
Series 100 CORE
RF104100
RF104200
RF104110
RF104151
2 x 12mm (7/16”)
RF104108A
RF104140
22mm
(7/8”)
RF104108A suits 22mm (7/8”)
mast collar post (not supplied)
4 x 8mm (5/16”)*²
22mm (7/8”)
Universal head can be fixed at 0° or 90° or
left free to swivel, by using a 2.5mm hex key.
Mainsheet, spinnaker sheet, vang, halyard and
backstay applications on boats to 16m (53ft).
Bearings: High compression strength,
self-lubricating acetal.
RF104108A halyard block has removable
12mm (1/2”) clevis pin to suit a 22mm (7/8”)
wide mast collar post.
General applications on larger yachts.
Head post: Grade 2205 stainless steel.
Cheek plates: Aluminium alloy.
Shackles: Grade 17-4PH stainless steel.
Sheaves: Glass fibre reinforced nylon.
Padeye: Grade 15-5PH stainless steel.
Other fixtures: Grade 316 stainless steel.
PRODUCT No.
DESCRIPTION
Ball Bearing
RF104100
Single block, universal head
RF104108A
Halyard block, clevis pin head
RF104110
Single block, becket, universal head
RF104140
Stand-up block, swivelling
RF104151
Foot block, single
RF104200
Double block, universal head
SHEAVE
DIAM.
mm
MAX.
ROPE
mm
PIN
DIAM.
mm
100
100
100
100
100
100
18
18
18
18
18
18
10
12
10
10
M.W.L.
kg
B.L.
kg
3250
7500
3250*1 7500*1
3250
7500
3000 6000*2
3250
7500
3250
7500
WEIGHT
g
SHEAVE
DIAM.
in
MAX.
ROPE
in
PIN
DIAM.
in
900
614
1098
1138
700
1400
4
4
4
4
4
4
3/4
3/4
3/4
3/4
3/4
3/4
3/8
1/2
3/8
3/8
*1 Full block rated load can only be achieved with uniformly distributed load across full length of clevis pin. i.e. 22mm (7/8”) diameter mast collar post or 22mm (7/8”) wide mast collar plate/tang.
*2 A4-80 DIN7991 grade fasteners recommended to achieve BL
M.W.L.
lb
B.L.
lb
7150 16500
7150*1 16500*1
7150 16500
6600 13200*2
7150 16500
7150 16500
WEIGHT
oz
31.8
21.7
38.8
40.2
24.7
49.5
59

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