Ronstan Core Blocks

Ronstan

Core Blocks™ are a true all around solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal & aluminium sheave options, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.

Ronstan Core Series Blocks 60mm
Product No. Sheave Diameter Load Limit Weight Line Size Wire Size
RF64100 60mm 1,000kg
(2,200lbs)
235g
(8.3oz)
12mm
(1/2in.)
-
RF64100AW 60mm 1,000kg
(2,200lbs)
292g
(10.3oz)
12mm
(1/2in.)
5mm
(3/16in.)
RF64103 60mm 1,000kg
(2,200lbs)
285g
(10.1oz)
12mm
(1/2in.)
-
RF64108 60mm 1,000kg
(2,200lbs)
186g
(6.6oz)
12mm
(1/2in.)
-
RF64100AW 60mm 1,000kg
(2,200lbs)
212g
(7.5oz)
12mm
(1/2in.)
5mm
(3/16in.)
RF64110 60mm 1,000kg
(2,200lbs)
275g
(9.7oz)
12mm
(1/2in.)
-
RF64130 60mm 1,000kg
(2,200lbs)
450g
(15.9oz)
12mm
(1/2in.)
-
RF64140 60mm 1,000kg
(2,200lbs)
372g
(13.2oz)
12mm
(1/2in.)
-
RF64108A 60mm 1,000kg
(2,200lbs)
182g
(6.4oz)
12mm
(1/2in.)
-
RF64500 60mm 1,000kg
(2,200lbs)
355g
(12.5oz)
12mm
(1/2in.)
-
RF64503 60mm 1,000kg
(2,200lbs)
405g
(14.2oz)
12mm
(1/2in.)
-
RF64520 60mm 1,000kg
(2,200lbs)
490g
(17.3oz)
12mm
(1/2in.)
-
RF64523 60mm 1,000kg
(2,200lbs)
540g
(19oz)
12mm
(1/2in.)
-
RF64151 60mm 1,000kg
(2,200lbs)
180g
(6.4oz)
12mm
(1/2in.)
-
RF64251 60mm 1,000kg
(2,200lbs)
370g
(13.1oz)
12mm
(1/2in.)
-
Ronstan Core Series Blocks 70mm
Product No. Sheave Diameter Load Limit Weight Line Size Wire Size
RF74100 70mm 1,500kg
(3,300lbs)
354g
(12.5oz)
14mm
(9/16in.)
-
RF74100AW 70mm 1,500kg
(3,300lbs)
432g
(15.3oz)
14mm
(9/16in.)
8mm
(5/16in.)
RF74110 70mm 1,500kg
(3,300lbs)
428g
(15.1oz)
14mm
(9/16in.)
-
RF74140 70mm 1,500kg
(3,300lbs)
468g
(16.5oz)
14mm
(9/16in.)
-
RF74108 70mm 1,500kg
(3,300lbs)
234g
(8.3oz)
14mm
(9/16in.)
-
RF74108A 70mm 1,500kg
(3,300lbs)
230g
(8.1oz)
14mm
(9/16in.)
-
RF74151 70mm 1,500kg
(3,300lbs)
259g
(9.2oz)
14mm
(9/16in.)
-
RF74202 70mm 1,500kg
(3,300lbs)
506g
(17.9oz)
14mm
(9/16in.)
-
RF74251 70mm 1,500kg
(3,300lbs)
530g
(18.7oz)
14mm
(9/16in.)
-