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DID Digital Torque Screwdriver

Made in Japan
DID-4A Digital Torque Screwdriver
Click images to enlarge.
2 Models
: Capacity: 4.500 lb-in / 50.00 N-cm
DID-4A:Capacity: 35.00 lb-in / 400.0 N-cm

The DID is a torque measuring manual screwdriver designed for lab and production use. The large LCD display measures bi-directional torque in real-time or peak modes. USB data output allows the user to graph torque vs time with optional SW-1SD software.

The DID has an accuracy of ± 0.5% F.S., ±1 LSD and has programmable setpoints that provide both an audible beep and green/red LED indicator for uniform tightening or GO/NO GO testing. In addition, it features a programmable counter that minimizes assembly errors by identifying mis-tightening and/or defective screws. Optional ratcheting clutch allows for convenient tightening or loosening. Use the 800 internal memory for data recall or USB download for SPC.

The DID substantially reduces scrap and rework costs by eliminating over and under-tightening and is ideal for use in a wide variety of applications including the manufacture of electronic, appliance and aerospace assemblies.

DID-4a Torque Screwdriver


  • Includes 3-Point Certificate NIST Traceable Calibration Certificate, ISO-17025 Cert Optional
  • Peak, Real Time and Peak Down measuring mode (selectable)
  • Statistics: number of data, Max, Min, Avg
  • Programmable screw tightening counter
  • DID-4 uses standard 1/4" bits, DID-05 uses 4mm ROUND or Half ROUND bits.
  • Selectable units ozf-in, lbf-in, kgf-cm, N-cm and N-m
  • Runs on internal NiCad batteries (8 hour use) Auto shut-off after 10 min. of non-use
  • Programmable High and Low set points with both audible beep and Green/Red LED indicator for uniform torque tightening or GO/NO GO testing
  • USB virtual COM port sends peak (1 data) or continuous data (12 or 180 data/second)
  • 800 data memory for recall or for SPC download
  • Programmable Auto Zero function resets unit to zero for easy operation
  • 2 Phillips tips, AC charger included
  • 2-Year Warranty
  • DID-05 features a built-in 1 way clutch

Force Ranges

DID-0569.50 in-oz
4.500 in-lb
5.000 kg-cm
50.00 N-cm
0.01 in-oz
0.001 in-lb
0.001 Kg-cm
0.01 N-cm
DID-4A560.0 in-oz
35.00 in-lb
40.00 kg-cm
400.0 N-cm
4.000 N-m
0.1 in-oz
0.01 in-lb
0.01 Kg-cm
0.1 N-cm
0.001 N-m


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Complete Kit

DID-4A includes 1/4″ female hex adapter, 2pcs 1/4″ Phillips bits
DID-05 includes Phillips and Flat bits

Both models include an AC Adapter charger and calibration cert.


Accuracy+/- 0.5% F.S., +/- 1 LSD
Display4 digit LCD
OperationCW, CCW and fixed position (DID-4 Only)
Measuring Modes
PPPeak Mode displays PEAK torque value that will not change until a higher value is measured
PDPeak Down Mode Captures first peak down value above the PDLO
Real TimeDisplays transient torque values
CReal-time Output 180 data per second
GO/NO GO testingProgrammable High and Low setpoints with both audible beep and Green/Red LED indicator
StatisticsNumber of data, maximum, minimum and average
Data TransferASCII, 19200 bps, USB miniB cable
Data Memory800 data
Batch Counter1-99 (CW only)
Power SupplyNi-Cad rechargeable batteries 1.2V×4cells 600mAh
Auto Power SaveAutomatic switch off after 10 minutes of non-use
Charging TimeFrom empty - less than 5hours
Working Time12 hours continuous use
AccessoriesAC/DC Adapter/Charger, 100~230VAC, 2 Phillips bits, NIST certificate
Warranty1 Year

Buy Now

Item Description Price
Digital Torque Screwdriver, 35 lb-in / 4Nm Capacity
Digital Torque Screwdriver, 35 lb-in / 4Nm Capacity with ISO-17025 Calibration Cert
Digital Torque Screwdriver, 4.5 lb-in / 50 N-cm Capacity
Digital Torque Screwdriver, 4.5 lb-in / 50 N-cm Capacity with ISO-17025 Calibration Cert
Data Acquisition Software for DID Torque Screwdriver
USB Output Cable for DID and DIW torque tools
Ratchet Clutch for use with DID-4A Torque Screwdriver
33 Piece 1/4" Hex Bit Set with drive extension, 6 Torx, 5 Hex bits, 8 Phillips, 8 Pozidrive, 5 slotted bits [Not for use with DID-05]
Power Adapter for DID (formerly 3A-066WP12-120)
Replacement Battery for DID-4(A) Screwdriver
Drive Adapter for DID-05 4mm half-moon to 1/4" Female Hex
Small Hard Shell Carrying Case for DID Models
In stock
1 Week Lead Time (Estimated)
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Lead Time Varies, Please contact us for availability.