With conventional direct-drive DC tools, operators must withstand reaction forces of about ±7 Nm for pistol nut runners and ±40 Nm for angle nut runners; beyond these limits, costly and bulky manipulators are required to absorb the torque. ESTIC’s patented motor-control system dramatically reduces these operator reaction forces. Their pulse-fastening DC tools tighten with intermittent impact impulses — similar to hammer strikes, which produce far lower reaction forces for the user than continuous-motion tightening.
The patented “Estic Pulse” technology reduces the reaction force when fastening to a minimum and promotes safety. This ergonomic technology reduces the risk of workplace injury. What’s more, the tool’s ergonomic design and advanced pulse fastening technology allow for single-handed operation in certain situations, dramatically reducing the strain placed on the operator.
Corded or cordless handheld electric DC nut runners with pulse technology are available in following models:
In traditional direct fastening with DC tools, the motor applies a continuous rotational force to tighten the fastener. This constant torque is transmitted directly through the tool to the operator’s hand, resulting in significant reaction forces. For example, when the fastener reaches its torque threshold, the tool suddenly resists further rotation, causing a sharp counterforce that can strain the operator’s wrist and arm. To manage these forces, companies often rely on heavy and expensive manipulators or torque arms to stabilize the tool and protect the operator - especially at higher torque levels.
By contrast, ESTIC’s pulse fastening technology uses a patented motor control system that applies torque in short, controlled bursts rather than one continuous motion. Each pulse is like a quick, precise hammer strike - tightening the fastener incrementally while momentarily releasing the built-up reaction force between impacts. This intermittent action drastically reduces the amount of torque transmitted back to the operator, providing a much smoother and safer working experience without sacrificing accuracy or speed.
The result is a fastening process that achieves the same torque precision as direct drive systems but with significantly lower operator fatigue and improved ergonomics. ESTIC’s pulsing technology allows users to handle higher torque applications without additional support equipment, reducing overall system cost and improving productivity.