Tohnichi Torque Screw Drivers

Tohnichi Torque Screw Drivers cover two distinct approaches to torque control: signal-type models for tightening, and direct reading models for measuring and inspection. Signal-type tools use rotary slip or a click mechanism to prevent over-torque, while direct reading models display numerical measurement values in real time. Pokayoke (error-proof) variants add a further layer of protection against human tightening errors. Made in Japan.

Series Overview

• RTD series — ratcheting mechanism prevents over-torque; torque value set with external scale.
• LTD series — clicks at the set value; torque value set with external scale.
• AMRD/BMRD series — low torque version of RTD, supplied with special size bits.
• AMLD/BMLD series — low torque version of LTD, supplied with special size bits.
• RTDLS/RNTDLS series — includes a limit switch for error-proofing integration.
• RNTD series — rotary slip preset version; no external scale.
• NTD series — preset version; no external scale.
• RNTD/NTD series — torque value set using a tester rather than an external scale.
• RTDZ/RNTDZ series — insulated design for electric vehicle assembly and battery terminal connection work.

Typical Applications

• Precision fastening in manufacturing and assembly environments
• Quality inspection using direct reading models
• Error-proofing lines requiring Pokayoke or limit switch integration
• Electric vehicle battery terminal assembly requiring insulated tools
• Low-torque applications using AMRD/BMRD/AMLD/BMLD series

Tohnichi Torque Screw Drivers Specifications