Industrial Tools
Torque Systems

Sturtevant Richmont Roto-Torq CAL

Capacity 400 cNm // 36 lbfin // 40 kgfcm

Micrometer Adjustable Torque Screwdriver with Dual Scale

Sturtevant Richmont's CAL 36/4, with its' dual English/Metric scale, amazing durability, and ease of use has been an industry leader for decades – for good reasons! The CAL line of torque screwdrivers is first choice for many electronic and small-component manufacturers. The SR CAL-Series Adjustable Torque Screwdrivers are ideal for any application where:

  • High repeatability for low torque is needed,
  • Excellent durability and versatility are needed.


These needs are common in high-precision operations such as electronics and electro-mechanical repair. To operate, simply dial torque setting and insert bit. The Micrometer scale on the shaft is marked in dual incrementation (lbf·in and N·m on CAL 36/4, kgf·cm on CAL 40).


The operator cannot overtorque. A clutch releases automatically when desired torque has been achieved. The anti-backlash design enhances the repeatability. CAL torque screwdrivers are incredibly durable. Many owners have experienced a service life of 10+ years.


Key Features

  • Dual english/metric micrometer scale.
  • Magnifying lens improves view of clearly engraved incrementation.
  • Bi-directional accuracy of ± 6% indicated value (20-100% of capacity).
  • Meets or exceeds ASME B107.300-2010 and EN ISO 6789.
  • Polished Aluminium exterior (except Model CAL-36S with steel shaft).
  • Long shaft for use in limited-access applications.
  • 1/4“ female hex drive for standard bits and adaptors (DIN 3126 C 6.3).
  • Incl. free ISO/IEC 17025 calibration certificate for English or SI units.



  • When a variety of of fastener types may be encountered, you should choose the CAL-KIT, in order to always have a multiplicity of usual insert bits for service work. Available as 29 pcs Set or 6 pcs Set in custom carrying/storage case.
RotoTorq CAL
Model Item No. Torque Range* lbf·in Torque Range* cN·m Torque Range* kgf·cm Graduation lbf·in Graduation N·m Graduation kgf·cm Handle diam. mm Weight kg Length mm
CAL 36/4 R810587 7.2 - 36 80 - 400 2 0.2 35 0.22 197
CAL 36/4 Euro R810017 7.2 - 36 80 - 400 2 0.2 35 0.22 197
CAL 40 R810477 8 - 40 2 35 0.22 197

* The requirements and verification procederes of the DIN EN ISO 6789 are valid for a measuring range from 20% to 100% of the rated capacity (maximum value). The effective span of a torque tool may differently begin lower.

All specifications without guarantee, errors and omissions excepted.

Data pricacy and cookies

This site uses cookies. Please choose. Please specify which cookies you want to allow.

These cookies are necessary for the execution of the specific functions of the website and can not be deselected. These cookies are not for tracking.


Advertising cookies are used to display advertising that suits your browsing habits best.

These cookies help us to understand how our website is used. This allows us to improve our performance for you. Zudem werden externe Anwendungen (z.B. Google Maps) mit Ihrem Standort zur einfachen Navigation beliefert.