DI-4B-25 Air Tool & Impact Wrench Torque Tester

Made in Japan
di-4b-25 Impact  Torque Tester
Click images to enlarge.
The DI-4B-25 Digital Torque Tester for impact tools is designed testing and calibration of air tools and impact drivers up to 220 lbf-in / 2500 N-cm. In production facilities it is crucial to check the consistency of air guns and impact wrenches. This torque tester gives a digital readout of peak value in either clockwise or counterclockwise directions and also indicates the number of blows for a selected time period (adjustable). The DI-4b-25 torque tester features 3 measurement modes: Peak Down, Peak, or Real Time measurement modes and selectable units lbf-in, kgf-cm, N-cm. Calibrate your own air tools and impact drivers and save down time. SPC Capability

The DI-4B-25 digital torque tester has an accuracy of ±0.5%, ±1 LSD, Peak, Real Time and Peak Down modes. The DI-4B-25 is compatible with our SW-1SV-USB Torque Data Acquisition Spreadsheet. Peak data can be downloaded through the USB virtual COM port to be analyzed further in Excel.


  • Heavy duty metal construction
  • Displays number of blows for selected period (0.1 - 9.9 sec)
  • Selectable Units: lb-ft, kg-m and N-m
  • Both clockwise and counterclockwise operation
  • RS-232 peak data output for SPC capability
  • Peak, Real Time and Peak Down measuring mode (selectable)
  • Runs on internal NiCad batteries (8 hour use)
  • Soft joint, hard joint and AC adapter/charger included
  • ISO/IEC 17025 Long-form Certificate & Test Data is optionally available
  • 2 Year Warranty
  • Includes NIST Traceable Calibration Certificate

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Digital Torque Tester for Air Tools & Impact Wrenches
- Accuracy: ±0.5% F.S. ±1 LSD ( 32° to 100°F)
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Data Acquisition Software for Torque
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di-4b-25 dimensions

Complete Kit

The DI-4B-25 is supplied as a complete kit including torque tester, joint simulators, ac adapter/charger, operating instructions and calibration certificate
di-4b-25 complete kit


Capacity0.1~220.0 lbf-in
0.1~250.0 kgf-cm
0.01~25.00 N-m
Accuracy± 0.5% F.S., ±1 LSD

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  Item Description Price  
DI-4B-25 Torque Tester Complete Kit
Upgrade from 3 point NIST traceable cert to ISO-17025 Certificate
Data Acquisition Software for Torque
USB output cable (formerly CB-208)
In stock
1 Week Lead Time (Estimated)
2-3 Week Lead Time (Estimated)
Lead Time Varies, Please contact us for availability.