Turnbuckles

Type 1 Turnbuckles have a sleek, modern profile with no sharp edges. They are easily adjusted by turning the unique coupling nut, which is free to rotate on the turnbuckle barrel, and are secured with a quick turn on the cone shaped locking nut. A sight hole is provided in the coupling nut to verify adequate thread engagement. With single end adjustment and adequate thread, Type 1 turnbuckles are much easier to adjust than conventional turnbuckles, and the use of dissimilar but compatible metals for the threaded components avoids the risk of thread seizure. Toggles are designed with full universal movement for easy installation and connection and allow the assembled cable to move where the structure is subject to wind loads or vibration.

Calibrated Turnbuckles - For accurate, repeatable settings of rig tension and precise adjustment, calibrated turnbuckles are available for wire sizes up to 6mm (1/4").

Type 2 Turnbuckles are traditional closed body turnbuckles with polished chrome plated, high grade brass bodies and grade 316 stainless steel end fittings. This combination of materials avoids the risk of excessive thread wear or seizure under load, which can occur in turnbuckles with all stainless steel components. After tensioning, internally tapered locking nuts secure the adjustment. Sight holes are provided in the bodies to verify adequate thread engagement. For easy thread identification, a machined groove identities the left-hand thread locking nut and body end. Toggles are designed with full universal movement for easy installation and connection and allow the assembled cable to move where the structure is subject to wind loads or vibration.

Open Body Turnbuckles are made from polished chrome plated high grade brass bodies with grade 316 stainless steel end fittings. This combination of materials not only avoids the risk of excessive thread wear or seizure under load, but also provides the considerable advantage of easier adjustment.

As shown on the accompanying graph, for a given level of torque, up to 47% more tension can be achieved with the Ronstan brass body turnbuckle than with competitors bronze body turnbuckles, or up to 71% more than an equivalent stainless steel body turnbuckle. Conversely, for a given required rig tension the torque required to adjust a competitors bronze or stainless steel body turnbuckle is up to 40% or 75% more respectively than that of the Ronstan brass body turnbuckle.

After tensioning, cross-drilled ends in the threaded terminals enable the use of split-pins to lock and secure the adjustment. For easy thread identification an etched "R" identifies the right-hand threaded end of the body.

As with all Ronstan turnbuckles, toggles are designed with full universal movement for easy installation and connection and allow the assembled cable to move where the structure is subject to wind loads or vibration.