Ronstan's award-winning Series 75mm Core Blocks have a tuned two-stage bearing system that provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle dynamic or static loads.
Under moderate loads, the Acetal ball bearings ensure minimum friction. Under heavy loads, stage two kicks in and the sliding Acetal bearing on a polished stainless steel race takes over to maintain low-friction performance.
The Series 75 Core Blocks are ideal for mainsheet, halyard, and spinnaker sheet applications on up to 46' (14m) and general applications on larger yachts.
This Core foot block has less than half the friction of its nearest competitor. This foot block has only two fastener holes, which minimizes deck sealing considerations. Use 2x3/8 in (10mm) fasteners (not provided).
|Breaking Load (lbs)||6600|
|Breaking Load (kg)||1500|
|Max Line Size (in)||9/16|
|Max Line Size (mm)||14|
|Note||SWL = Full block rate load can only be achieved with uniformly distributed load across full length of clevis pin.|
|Safe Working Load (lbs)||3300|
|Safe Working Load (kg)||1500|
|Sheave Diameter (in)||3|
|Sheave Diameter (mm)||75|