A pulse mechanism with pistons for minimum weight and long service life TRIM valve for enhanced performance on hard joints and at low torque levels AUTOTRIM valve, the optimal solution for mixed hard and soft joints The ErgoPulse PT/PTS/PTX pulse unit features a more efficient transfer of the impulse energy. The design is based on cam-guided pistons and rollers and the pulse cylinder is oil-filled. The moving parts are thus completely immersed in oil, which ensures a long service life.The unique piston principle makes the PT/PTS/PTX tools extremely light. Twin chamber motor
The ErgoPulse PT, PTS and PTX nutrun-ners have a twin chamber vane motor. It is designed for giving high torque at low speed, which gives the best char-
acteristics for fast, reliable and accurate tightening. The PT, PTS and PTX tools incorporate a patented adjustable valve at the air outlet. This feature enhances the tool’s performance on hard joints and at low torque levels.The PTS/PTX-RE tools are reporting as standard. This means that they sup-
ply an air signal that can be connected to a RE-Controller to count the number of tightenings and to detect premature shut-off and rehits. The PTS/PTX-AT tools are equipped with an automatic two-stage Trim valve. The tool runs down the screw with reduced free speed. After 1-2 pulses it shifts auto-
matically to full power thus enabling both hard and soft joints to be tightened with excellent result without any adjustments.The PTS/PTX-AT tools can also be used for reporting applications.
ErgoPulse – Shut-off type
PT/PTS/PTX torque sensing shut-off system – an active part of the tight-
ening process The ErgoPulse PT, PTS and PTX nut-runners incorporate a shut-off system based on retardation instead of timers or bypass
valves specifications. Torque is “sensed” by means of a rotatable inertial mass act-
ing against an adjustable spring. When the force of the mass is sufficient to overcome the preset force in the spring, a lock pin releases a disc valve to shut off the air supply. The result is a highly accurate and easily adjustable shut-off system. PT, PTS and PTX pulse unit and Twin piston mechanism Twin chamber motor shut-off system Recommended operating area Max recommended tightening time for a pulse tool is 3 seconds. Longer time indi-
cates that the joint is too soft for the tool used. If so, it is recommended to choose a bigger size of tool or another type of nutrunner.Minimum recommended number of pulses per tightening is 5. Fewer pulses will result in increased scatter. By reduc-
ing the free speed with the TRIM valve (PT/PTS/PTX) there will be more pulses per tightening and improved accuracy.
Max.settingMin.settingHard jointTightening angle ≈ 30 Soft jointTightening angle ≈ 300 Reducedfree speedby Trim valve Max. freespeed
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