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Battery Torque Wrench DYNAMO Series

The Cordless Wrench Dynamo Series is a compact design for working in limited spaces or without a power supply. It has 20 torque values to choose from. Battery driven 2 speed torque multiplier from 150nm. (110 ft.lbs) to 4,400 nm. (3,245 ft.lbs). Engineered to master any application effortlessly, the ability to torque industrial fasteners is a simple and quick charge away. The dynamo's lithium power will provide you with the capability to torque hundreds of fastenings with no hoses or cords to limit your reach. Within the dynamo is a digital motor vectoring system that provides accurate and repeatable torque throughout each model's full range. The dynamo exemplifies the durability, reliability and safety that has embodied every industrial wrench crafted by POWERMASTER since the company's founding in 1971.


  • Hardened alloy steel for durability and long cycle life.
  • Multi-stage planetary gear systems with optimized tooth design.
  • Smooth ball bearing rotation of the gearbox housing independent from the motor handle.
  • High-Efficiency Brushless Motor.
  • Ergonomic glass-filled Nylon handle with a durable slip-resistant over mold.
  • 18V 5.2 Ah LiHD Battery that provides extended run-time.
  • Thumbwheel for setting Torque.
  • Thrust bearing between stages isolate the motor when used in all orientations.
  • Gears run on low friction, high strength bearing sleeves.

Technical Details

 Model Min. Torque Max. Torque Free Speed Sq. Size Weight with Reaction Arm
Lb.ft Nm Lb.ft Nm rpm inch kg
DYNAMO-100 110 150 664 900 25 3/4" 6.6
DYNAMO-200 221 300 1990 2700 4 1" 7.0
DYNAMO-300 295 400 2580 3500 2.3 1" 9.5
DYNAMO-400 330 450 3245 4400 1.6 1.1/2" 12.5