Ronstan All-Purpose Blocks

Ronstan

All-Purpose Blocks with self-lubricating Acetal polymer sheaves running on polished Stainless Steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing. Available in comprehensive range of sizes and configurations to suit a range of rope diameters and load requirements.

Ronstan All-Purpose Blocks 20mm
Product No. Sheave Diameter Load Limit Weight Line Size
RF20100 20mm 250kg
(550lbs)
20g
(0.7oz)
6mm
(1/4in.)
RF20101 20mm 250kg
(550lbs)
16g
(0.6oz)
6mm
(1/4in.)
RF20111 20mm 250kg
(550lbs)
18g
(0.6oz)
6mm
(1/4in.)
RF20141 20mm 250kg
(550lbs)
20g
(0.7oz)
6mm
(1/4in.)
RF20202 20mm 350kg
(770lbs)
42g
(1.5oz)
6mm
(1/4in.)
RF20212 20mm 350kg
(770lbs)
44g
(1.6oz)
6mm
(1/4in.)
RF20281 20mm 250kg
(550lbs)
28g
(1oz)
6mm
(1/4in.)
RF20284 20mm 250kg
(550lbs)
30g
(1.1oz)
6mm
(1/4in.)
RF20400 20mm 400kg
(880lbs)
62g
(2.2oz)
6mm
(1/4in.)
RF20302 20mm 400kg
(880lbs)
62g
(2.2oz)
6mm
(1/4in.)
RF20312 20mm 400kg
(880lbs)
64g
(2.3oz)
6mm
(1/4in.)
RF20332 20mm 400kg
(880lbs)
122g
(4.3oz)
6mm
(1/4in.)
RF20151 20mm 250kg
(550lbs)
14g
(0.5oz)
6mm
(1/4in.)
RF20151A 20mm 250kg
(550lbs)
17g
(0.6oz)
6mm
(1/4in.)
RF20171 20mm 250kg
(550lbs)
18g
(0.6oz)
6mm
(1/4in.)
RF20174 20mm 250kg
(550lbs)
30g
(1.1oz)
6mm
(1/4in.)
RF20175 20mm 150kg
(330lbs)
79g
(2.8oz)
6mm
(1/4in.)
RF20184 20mm 250kg
(550lbs)
22g
(0.8oz)
6mm
(1/4in.)
Ronstan All-Purpose Blocks 40mm
Product No. Sheave Diameter Load Limit Weight Line Size
RF41100 40mm 400kg
(880lbs)
71g
(2.5oz)
10mm
(3/16in.)
RF41101 40mm 400kg
(880lbs)
54g
(1.9oz)
10mm
(3/16in.)
RF41110 40mm 400kg
(880lbs)
80g
(2.8oz)
10mm
(3/16in.)
RF41111 40mm 400kg
(880lbs)
61g
(2.2oz)
10mm
(3/16in.)
RF41140 40mm 400kg
(880lbs)
72g
(2.5oz)
10mm
(3/16in.)
RF41202 40mm 600kg
(1320lbs)
135g
(4.8oz)
10mm
(3/16in.)
RF41212 40mm 600kg
(1320lbs)
143g
(5oz)
10mm
(3/16in.)
RF41302 40mm 700kg
(1540lbs)
195g
(6.9oz)
10mm
(3/16in.)
RF41312 40mm 700kg
(1540lbs)
209g
(7.4oz)
10mm
(3/16in.)
RF41151 40mm 400kg
(880lbs)
66g
(2.3oz)
10mm
(3/16in.)
RF41500 40mm 400kg
(880lbs)
91g
(3.2oz)
10mm
(3/16in.)
RF41510 40mm 400kg
(880lbs)
98g
(3.5oz)
10mm
(3/16in.)
RF41520 40mm 400kg
(880lbs)
157g
(5.5oz)
10mm
(3/16in.)
RF41530 40mm 400kg
(880lbs)
164g
(5.8oz)
10mm
(3/16in.)
Ronstan All-Purpose Blocks 50mm
Product No. Sheave Diameter Load Limit Weight Line Size
RF51100 50mm 750kg
(1650lbs)
118g
(4.2oz)
12mm
(1/2in.)
RF51101 50mm 750kg
(1650lbs)
98g
(3.5oz)
12mm
(1/2in.)
RF51110 50mm 750kg
(1650lbs)
134g
(4.7oz)
12mm
(1/2in.)
RF51111 50mm 750kg
(1650lbs)
114g
(4oz)
12mm
(1/2in.)
RF51200 50mm 1000kg
(2200lbs)
255g
(9oz)
12mm
(1/2in.)
RF51210 50mm 1000kg
(2200lbs)
271g
(9.6oz)
12mm
(1/2in.)
RF51300 50mm 1200kg
(2650lbs)
369g
(13oz)
12mm
(1/2in.)
RF51171HL 50mm 800g
(1760lbs)
115g
(4.1oz)
12mm
(1/2in.)
RF51140 50mm 750g
(1650lbs)
118g
(4.2oz)
12mm
(1/2in.)
RF51500 50mm 750g
(1650lbs)
167g
(5.9oz)
12mm
(1/2in.)
RF51510 50mm 750g
(1650lbs)
176g
(6.2oz)
12mm
(1/2in.)
RF51530 50mm 750g
(1650lbs)
318g
(11.2oz)
12mm
(1/2in.)