Ronstan's new Series 20 Blocks are the smallest of Ronstan's ball bearing blocks. They have very high maximum working loads between 440 and 880 lbs., depending on the block configuration.
Sheaves are 20mm (3/4 in) and support a max line size of 6mm (1/4 in).ﾠ High-load (HL) blocks can handle wire up to 1/8 in in diameter.
These blocks are suitable for almost all small dinghy control line systems and work well in lightly loaded control lines assemblies on larger boats as well.ﾠ The exit blocks minimize friction in lines passing trough the deck or exiting masts or booms.
This low profile version comes with side tabs only and we recommend 2 x4mm (5/32 in.) fasteners.
|Breaking Load (lbs)||2200|
|Breaking Load (kg)||1000|
|Safe Working Load (lbs)||550|
|Safe Working Load (kg)||250|
|Sheave Diameter (in)||3/4|
|Sheave Diameter (mm)||20|