The Voice of
Torque Control

You are here: Products  >  Torque Measurement  >  Torque Transducers  >  Smart Torque Block (STB)  >  (Obsolete) 'SMART' STB, 3000 N.m; for TST, TTT or Pro-Log

(Obsolete) 'SMART' STB, 3000 N.m; for TST, TTT or Pro-Log

STB Transducers were originally used with Norbar's "TWA" measurement system. The TWA instrument is no longer available but the transducers have been upgraded to the new generation 'SMART' type.

Part number: 50684.LOG
EAN Bar Code: -
NATO number: -
Accuracy: See Text
Operates between:
150.0 - 3000.0 N·m


  • Weight: 4.34 Kg
  • Temp Range Operating: -10°C to +50°C
  • Temp Range Storage: -20°C to +70°C
  • Thermal Effect On Span: < +/- 0.03%/°C
  • Thermal Effect On Zero: < +/- 0.01%/°C
  • Torsional Deflection: < 1°
  • Fatigue: > 10 exp 7 cycles
  • Maximum Torsion Capacity: 100%
  • Connector: Lemo®
  • Drive 1: 1"
  • Drive 2: 3/4"


  • 'SMART' - TST, TTT, TTL-HE and T-Box instruments will automatically recognise calibration details.
  • Supplied with UKAS calibration certificate.
  • Accuracy: Class 1 for the primary classification range (+/-0.5% of reading).

Operators Handbook


Associated Ranges

Product Selector

Finding the correct torque tool for your specific application is essential to ensure torque is applied accurately and with maximum ease.

Use our Product Selector to find exactly the right Norbar tool for the job.

Click here >>

Find a Distributor

There are Norbar companies in the UK, North America, Australia, New Zealand, Singapore, China and India, together with a network of specialist distributors in most countries.

Select any region on our world map for contact details.

Click here >>

Download Catalogue

Details of Norbar’s extensive range of torque wrenches, multipliers and equipment for measurement and calibration can be downloaded in our comprehensive online product catalogue.

Click here >>

Norbar Videos

Norbar’s collection of training videos.

Click here >>

Norbar News & Updates

Read about Norbar’s news and developments in the UK and across our international network for the latest updates on the fascinating and fast-moving world of precision torque engineering.

Click here >>

Download Our Apps

Norbar apps are available free for download on Android and iPhone and are invaluable tools for engineers.

Our Torque Unit Converter provides instant conversion across Metric, SI and Imperial units.

The Torque Extension app calculates the exact torque wrench setting value for required level of torque to be applied.

Click here >>


Precision torque engineering is a wide and complex field which is critical to many sectors of industry and poses many questions to those seeking information about its features and practical applications.

Here are some of the key queries we regularly encounter.

Click here >>

Use Our Calculators

Norbar has devised easy-to-use online calculators that support the correct application of torque in three key areas:

  1. Unit conversion to assist international measurement definitions.
  2. Torque extension for setting correct values
  3. Torque tension to identify precise levels of torque to be applied for individual applications.
Copyright 2016 Norbar

Norbar Torque Tools Inc. 36400 Biltmore Place, Willoughby, Ohio 44094, USA