Ronstan's Series 30 Ball Bearing Orbit Blocks boast the highest strength-to-weight ratios on the market. They are almost entirely of high-tech, composite, polymer materials.
Ronstan's two-stage bearing system features high-compression grade Acetal ball bearings and a secondary full contact Nylatron sheave and full contact bearing for dynamic loads, which results in minimum friction. They attach with UV-stabilized, multi-strand impregnated Dyneema SK-75 Links. The Links are 10 times stronger and lighter than steel, and provide the final connection from the block to the load point.
Use these blocks in mainsheet and spinnaker sheet, halyard, vang, and backstay systems on dinghies and for control line applications on larger boats.
This stand-up, swivel Ball Bearing Orbit Block is compact and has a low profile. Spare parts include RF318 springs and RF498 10mm narrow saddles for deck and pole mounting.
|Breaking Load (lbs)||1323|
|Breaking Load (kg)||600|
|Max Line Size (in)||5/16|
|Max Line Size (mm)||8|
|Safe Working Load (lbs)||661|
|Safe Working Load (kg)||300|
|Sheave Diameter (in)||1 3/16|
|Sheave Diameter (mm)||30|