Torque Reaction Arm ( 505mm working radius)


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Torque Reaction Arm ( 505mm working radius) | Assembly Machine Manufacturer - Chengmao

Chengmao Tools Industrial Co., Ltd. is one of the prime Torque Reaction Arm ( 505mm working radius) | hand tool and assembly machine manufacturers based in Taiwan since 1977.

ISO-9001:2015, CE certified and award winning design hand tools and assembly machines including automatic screw feeder machines, automatic wheel lacing machines, spring balancers, air hose balancers, air nippers & crimpers, torque reaction arms, etc.

Chengmao has been supplying hand tools and assembly machines to worldwide customers, both with the advanced technology and 50 years of experience, Chengmao ensures each customer's needs are met.

Torque Reaction Arm ( 505mm working radius)


Seals TR-350 Torque Reaction Arm has a 505mm work radius from the spindle base. With 365 degree rotation, TR-350 provides big work area. Meanwhile, its bendable arm design provide less conflict with other operator.

TR-350A is for pneumatic tools only. And, TR-350AE is both for electric and pneumatic screwdriver.


Torque Arm


It is designed to avoid for injuries caused by repetitive work and overusing the arm can occur in daily work activities. We provide the opportunity to implement ergonomic improvements to the manufacturing process. This torque reaction arm removes torque twisting and weight loading to create a safe work environment.


  • 1. Maintains tool in a constant vertical position.
  • 2. Exclusive height adjustment.
  • 3. 360° swivel.


Model No. TR-350A TR-350AE
Tool Installment Air Connector(A Type) Clamp(AE Type)
Max. Working Area R508 R508
Vertical Stroke 370 mm 370 mm
Screwdriver Type Pneumatic Electric / Pneumatic
Screwdriver Weight < 1 kgs < 0.8 kgs


  • Screwdriving.
  • Drilling and Tapping.
  • Automatic Screw Feeding.
  • Impact Wrenches.
  • Impact Tools.
  • Pulse Tools.
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Files Download
  • Automatic Screw Feeder Catalog
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    Full information of production line of automatic screw feeder from SEALS. This includes models for portable and automation application to enhance your screw assembly ability, efficiency, quality.