70mm OPF Blocks - Antal

Sizes are based on the range of HR shackles available and on their safe working load (SWL). The HR swivel head. Made in high resistance s.steel, with three positions: swiveling head, longitudinal lock and transversal lock. HR shackles included. The one-piece-frame. The one-piece aluminium extruded body is the strongest and lightest solution, no assembling pin rivets or screws and nuts. CNC machined - polished - hard black anodized and teflon coated. The composite fibre sheave. The resin (aluminium on larger mod) sheave runs on the main Composite Fibre bearing and on a ground s.steel hub: low friction highloads - no lubricant required. The self-captive side ball bearing reduces the friction and makes disassembling, cleaning and maintenance very easy. Sheaves are supplied with the s.steel hub, they are available separately.