Ronstan's Series 50mm Ball Bearing Blocks' are a great all around solution. Their self-lubricating Acetal polymer sheaves run on polished stainless steel races and perform equally well with dynamic loads and high static loads.
They are used in mainsheet, spinnaker sheet, halyard and other primary applications on boats up to 33 feet (10m). This 50mm All Purpose block has a single stainless steel fixed loop.
|Breaking Load (lbs)||3310|
|Breaking Load (kg)||1500|
|Safe Working Load (lbs)||1650|
|Safe Working Load (kg)||750|
|Sheave Diameter (in)||2|
|Sheave Diameter (mm)||50|