+31 (0)35-5882450 Extreme duty torque wrenches for heavy-duty applications

SDM battery series

Torque range: 25 – 680 Nm

Miniature size, giant performance

RAD has originally designed the SDM (Small Diameter Multiplier) gearboxes for the aerospace industry where tool access is limited and quality and precision standards are high. Because of the compact design, the SDM gearboxes provides a solution for applications where tool access to the bolt is restricted and where high torque is needed.

The low weight and size reduce operator fatigue and eliminate the use of large and tiresome manual torque wrenches. Combined with a quality nutrunner, the SDM Series provide repetitive precision with excellent durability thanks to clever materials and smart bearing technology.

Two options

  • SDM Gearbox only: Can be combined with a standard industrial nutrunner (electric, pneumatic or battery) of your own choice. See SDM Gearboxes for a complete list of SDM gearboxes.
  • SDM Battery Series Toolkit: Complete toolkits equipped with a standard angled battery nutrunner for torques of up to 680 Nm. An easy turnkey solution.


SDM Battery Series Toolkits
The SDM Battery Series is powered by a standard angled battery nutrunner (8 – 12 Nm output), which combined with the SDM gearbox is capable of a torque output of up to 680 Nm. The SDM Battery Series is calibrated on one pre-specified torque setting, multiple torque settings are not possible.


All SDM Battery Series Toolkits include:

  • SDM gearbox
  • Battery powered angled nutrunner
  • One 18V/4.0Amp Li-Ion battery with 220V charger
  • User manual
  • Calibration certificate



  • Mostly, bespoke reaction arms are needed for SDM applications, therefore reaction arms are not included.



Product range linedrawing_sdm-toolkit
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3000143SDM Toolkit 3401:23½"25 - 340 Nm3,0 Kg510 mm48 mm75 mm86 mm115 mm
3000144SDM Toolkit 6801:65¾"50 - 680 Nm3,0 Kg510 mm48 mm75 mm100 mm130 mm


> To B-RAD SELECT battery series 50 – 7.000 Nm

> To digital B-RAD PLUS battery series 70 – 4.000 Nm

> To B-RAD EXT-R series 175 – 1.400 Nm