The Ronstan Series 30 Ball Bearing Orbit Block - Cheek, part number CW55176, is a compact and lightweight block designed for various marine applications. It features an all-composite reinforced polymer construction, contributing to its strength-to-weight ratio. The block utilizes precision-designed ball bearings made from high compression strength Acetal to minimize friction during operation. This product is suitable for mainsheet and spinnaker systems on dinghies up to 5 meters (16 feet), as well as halyard, vang, and backstay applications on boats of the same size. Additionally, it can be integrated into control line systems on larger yachts. Its low profile and secure attachment options make it a practical component for managing lines where space and weight are considerations. The block is constructed with a carbon black Acetal sheave, glass fiber reinforced Nylon frame, and an SK75 Dyneema link.
The Ronstan Series 30 Ball Bearing Orbit Block is designed to work with ropes up to a maximum diameter of 8mm (5/16").
This block has a Maximum Working Load (M.W.L.) of 300kg (660lbs), indicating the maximum load it can safely handle during normal operation.
The sheave is made from high compression strength carbon black Acetal, and the ball bearings are also constructed from high compression strength Acetal.
This block is suitable for mainsheet systems and spinnaker sheets on dinghies up to 5 meters (16 feet), halyard, vang, and backstay applications on boats up to 5 meters (16 feet), and control line applications on larger yachts.
CW55176 - Ronstan Series 30 Ball Bearing Orbit Block™ - Cheek