DA SERIES


Precision manufactures the 5DA1 and 6DA1 Series Jacks from a single piece of hardened steel to exacting specifications. The result is a durable, lightweight, and compact stressing jack. These attributes make the 5DA1 and 6DA1 the jacks of choice for elevated construction projects.

  • Compact and lightweight
  • Ideal for elevated construction projects
  • Fast double-acting jacks with power-seating
  • 5DA1 - 20 ton, stresses up to .5" strand
  • 6DA1 - 30 ton, stresses up to .6" strand
  • Other gripper sizes and nose lengths are in stock
  • Sold as complete hydraulic systems or as individual components

Double-Acting System

The 5DA1 and 6DA1 jacks are double-acting, extending and retracting rapidly under hydraulic power. Both jacks use power wedge setters to seat the wedges into the anchor. After the desired stressing pressure is achieved, the valve on the pump is switched to the retract position. The valve maintains pressure on the strand. Engaging the pump causes the wedge setter to push forward and seat the wedges; when a preset pressure is achieved, the jack will then begin its return stroke.

Precision Post Tension, LP produces the 5DA1 and 6DA1 jacks from a single piece of hardened steel to exacting standards to produce a lightweight and durable stressing jack. These are the jacks of choice for elevated construction projects because of their compact and lightweight design.

We stock a complete inventory of replacement parts and accessories for these jacks. Nose assemblies 6" and 12" are stocked for immediate delivery. Other nose assemblies are available to customer specifications. From stressing accessories to hardware, Precision Post Tension, LP carries the most complete line of jacks and related components in the industry.

The 5DA1 jack is a 20 ton jack and stresses tendons up to .5" in diameter. Smaller diameter tendons may be stressed by changing the jack grippers to accommodate smaller diameters.

The 6DA1 jack is a 30 ton jack and stresses tendons up to .6" in diameter. Like the 5DA1, smaller diameter tendons may be stressed by changiing the jack grippers.

The 5DA1 and 6DA1 jacks are double-acting, meaning the jacks open and retract using hydraulic power. Both jacks use power wedge setters to seat the wedges into the anchor. After desired stressing pressure is achieved, the valve on the pump is switched to the retract position. Pressure is maintained on the tendon by the valve of the pump. By engaging the pump, the wedge setter pushes forward to seat the wedges and when a preset pressure is achieved, the jack will then begin its return stroke.

PTJ SERIES


Precision manufactures the PTJ Series of Stressing Jacks to meet the most rigorous job demands. With a proven design that has become an industry standard, these heavy duty jacks are available in a range of capacities and configurations.

  • Versatile and Powerful
  • Durable – Ideal for slab-on-grade.
  • PTJ5S or PTJ5P 20 ton for stressing up to .5" strand
  • PTJ6S or PTJ6P 30 ton for stressing up to .6" strand
  • Component style for easy parts replacement
  • PTJ5S and PTJ6S with spring-loaded wedge seating
  • PTJ5P and PTJ6P with hydraulic power wedge seating

The reliable and economical workhorse of the industry for over 20 years.

SCJ Short Cable Jack


The Precision SCJ Ram allows fast and safe stressing of short tendon stressing tails without any additional tools. This capability protects workers as well as saving substantial time in the field. The SCJ is only available from Precision.

  • Safe and effective for pulling 4” cables.*
  • No need for chairs or other cumbersome accessories.
  • Gripper jaws release when jack is fully retracted.
  • Requires only single hose and standard pump.
  • Uses standard 10” stroke cylinders; other strokes are available – call for quote.
  • Replacement parts readily available.

* For shorter cables, consult the factory.