Ronstan Series 15 Ball Bearing Utility Block - Exit Block

The Ronstan Series 15 Ball Bearing Utility Block – Exit Block is a precision-engineered rigging solution engineered for sailing, marine hardware, and outdoor rope systems where minimal weight and compact footprint are critical. This exit block serves as a fairlead or directional control point in pulley systems, redirecting rope runs efficiently while maintaining smooth, low-friction operation. It's ideal for boat builders, riggers, and sailors who demand the smallest and lightest ball bearing block available without sacrificing durability or performance.

The Series 15 block features a precision-molded acetal sheave mounted on stainless steel ball bearings, delivering exceptional mechanical efficiency and corrosion resistance in marine environments. The ball bearing design eliminates binding and enables ultra-low friction rotation, allowing rope to pass through the block smoothly under load. The compact 2 x 1 x 4 inch profile and featherweight 0.05 lb construction make it ideal for weight-conscious rigging where every ounce matters, such as high-performance sailing and aerial systems. Acetal material offers excellent chemical resistance and UV stability while maintaining rigidity in demanding conditions.

This block is most beneficial for sailors, marine technicians, and riggers looking to reduce overall system weight while maintaining reliable load transfer. It is commonly used as an exit block in mainsheet systems, jib leads, and other applications where rope must transition at an angle with minimal binding. The exit block design allows for clean rope routing along rails or boom vang setups. Compatible with standard rope diameters and integrated with Ronstan's modular rigging ecosystem, this block offers straightforward installation and reliable performance across recreational and professional maritime applications.