CTB20N2X10D-G CTB2, Digital Retighening Torque Wrench, 4-20 N.m

Tohnichi CTB20N2X10D-G is a high-precision digital indicating re-tightening torque wrench engineered for quality inspections, precise torque verification, and controlled tightening in demanding assembly environments such as electronics manufacturing, automotive component installation, and precision instrumentation. Delivering accurate measurements from 4 to 20 N·m via a 1/4" square drive with interchangeable QH10D ratchet head, this manual tool features dual LCD/LED displays for enhanced visibility, advanced re-tightening detection to prevent joint damage, data memory for up to 999 measurements with USB/RS232C output, and judgment functions for immediate pass/fail feedback on torque and re-hit events. Lightweight and ergonomic with a robust aluminum body, it supports bi-directional operation (clockwise and counterclockwise) for versatile use in tightening and loosening tasks, promoting operator efficiency and reducing the risk of over-torquing in low-to-moderate force applications.

Key Performance Specifications

• Torque Range: 4 - 20 N·m (35.4 - 177 in-lbs / 2.9 - 14.8 ft-lbs)
• Torque Graduation: 0.01 N·m
• Torque Accuracy: ±1% of indicated value
• Drive Size: 1/4" Square with QH10D Ratchet Head
• Loading Direction: Bi-directional (CW and CCW)

Physical and Environmental Specifications

• Overall Length: 300 mm (11.81")
• Weight: 0.50 kg (1.10 lbs)
• Handle Diameter: Approximately 22 mm (ergonomic for moderate-torque control)
• Operating Temperature: 32°F to 104°F (0°C to 40°C); suitable for standard workshop conditions
• Battery Life: Ni-MH rechargeable; approx. 20 hours continuous use
• Storage Conditions: Dry environment to prevent corrosion; calibration recommended annually

Key Features

• Dual Display System: LCD for direct light viewing and 7-segment LED for dark environments, with real-time and peak torque readouts
• Re-Tightening Detection: Advanced algorithm identifies and alerts on re-hit events to prevent over-tightening and joint failure
• Data Memory & Output: Stores up to 999 measurements (with date/time) via USB/RS232C for easy traceability and Excel integration
• Judgment & Alerts: Buzzer and multi-color LED for immediate pass/fail on set limits, plus auto zero and power-off functions
• Ergonomic Aluminum Body: Unified design adapted for color vision deficiencies, with CE marking and interchangeable head for versatile workflows
• Applications: Optimized for small-to-medium fastener tightening and inspection in electronics, aerospace, medical devices, and general precision assembly; excels in re-tightening prevention and compliance verification