Tohnichi

Tohnichi

Tohnichi is a Japanese manufacturer specializing in torque measurement and control tools, founded in 1949 and headquartered in Tokyo, Japan. The company is internationally recognized for producing high-precision torque wrenches, torque screwdrivers, angle wrenches, and torque measurement instruments used in assembly manufacturing, quality control, and calibration. Tohnichi torque tools are exported to over 50 countries and trusted in industries where precise fastening is critical to product safety and structural integrity.

Tohnichi's product range spans both manual torque tools and torque verification systems. Their torque testers and calibrators — including the DOT series such as the 350DOT, 500DOT, 1000DOT, 3000DOT, and 7000DOT — are designed to verify and calibrate torque wrenches in accordance with ISO 6789, the international standard for torque tool calibration. This makes Tohnichi equipment essential not only for production assembly operations but also for calibration laboratories and quality assurance departments maintaining torque tool accuracy records.

Key Product Lines

• Torque Wrenches: Click-type, beam-type, and digital torque wrenches for precision fastening across a wide torque range
• Torque Screwdrivers: Precision torque screwdrivers for electronics assembly, medical device manufacturing, and delicate fastening applications
• Torque Testers and Calibrators: DOT-series torque wrench testers for ISO 6789-compliant torque tool calibration
• Angle Wrenches: Tools for angle-controlled tightening strategies used in automotive and aerospace assembly

Industries Served

Tohnichi torque tools are widely used in automotive manufacturing, aerospace and defense assembly, electronics production, medical device manufacturing, and precision engineering. Their calibration instruments serve tool calibration laboratories, quality assurance departments, and maintenance facilities that must verify torque tool accuracy to ISO and industry safety standards.