Single-stage tensioners are versatile and reliable hydraulic bolt tensioners suitable for high load and tight space applications with limited overhead clearance.

Optimized for use on wind turbines they have been designed for long-life, low-maintenance use, and are suitable for use on single bolts, or grouped together for multiple tightening of bolted joints. Single tensioners are extensively used for slewing rings, power-gen applications, structural and all critical bolting. Single-Stage Hydraulic Tensioners are designed for speed. Fast spring piston retract, geared nut run-down and spring located sockets, improve process time on each tensioning operation. High cycle life, over-stroke protection and the latest seal technology ensure low maintenance operation to keep projects on schedule.