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Sturtevant Richmont Roto-Torq CAL

CAL 36/4 Highlights

RotoTorq usage example

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Sturtevant Roto-Torq CAL Torque Screwdriver

INFO: Frank W. Livermont (1898–1960), founder and owner of Richmont Inc., held numerous torque-related patents. The Livermont Analyser, the Roto-Torq screwdriver and the dovetail interchangeable head system gained worldwide fame.

Sturtevant Richmont Roto-Torq CAL Adjustable Torque Screwdriver

Capacity 400 cN·m // 36 lbf·in // 40 kgf·cm

Micrometer Adjustable Torque Screwdriver with Dual Scale

Customers around the world hail the SR Torque Screwdriver as the absolute best in the world. Why? Let's start at the beginning.

Richmont company founder Frank Livermont (former Lockheed Martin engineer) invented the torque screwdriver. Early on, Cleco wanted to buy the patent. Livermont refused to sell the patent. So Cleco made Livermont an offer he couldn't refuse. They bought the company. Cleco made the limited slip clutch famous; they owe that notoriety to the inventive Frank Livermont.

The design hasn't changed much since 1944 when Livermont patented the torque screwdriver. Why hasn't it changed? Because Livermont got it right the first time!

Now, it's a classic. The Sturtevant Richmont Roto-Torq 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 the top choice for electronic and small-component manufacturers. Perfect for applications demanding high repeatability at low torque, this tool stands out for its exceptional durability and versatility. Additionally, it is ESD compliant when used with a grounding strap, ensuring safe and reliable operation.

Key Features

Accuracy of ± 6% indicated value (from 20-100% of capacity) meets or exceeds ASME B107.300-2010 and ISO 6789.
Incredibly durable! Many users have experienced a service life of 10+ years.
Operators cannot over-torque; clutch releases at set torque.
Anti-backsplash design for repeatability.
To operate, simply dial in torque and insert bit.
Bi-directional CW/CCW versatility.
Polished aluminum exterior.
Scales clearly engraved on shaft and magnified for ease of reading.
Includes free calibration certificate from our ISO/IEC 17025 accredited laboratory (can be ordered with certification for English or Metric units of measure).
Uses standard bits, adapters, and sockets.

Scope of Supply

Torque screwdriver CAL
Operating manual
Traceable ISO/IEC 17025 calibration certificate

Options / Accs / Spares

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.
R853177 = CAL-36/4 with steel shaft
R810017 = CAL-36/4 with calibration certificate in Nm
Insert bits 6.35 mm (1/4 inch) hex drive

NATO approval (NSN)

5120-00-021-2041 = CAL-36/4

RotoTorq CAL

Model	Item No.	Torque Range [lbf·in]	Torque Range [N·m]	Torque Range [kgf·cm]	Graduation [lbf·in]	Graduation [N·m]	Graduation [kgf·cm]	Length [mm]	Weight [kg]
CAL 36/4	R 810587	7 - 36	0.8 - 4	–	2	0.2	–	197	0.22
CAL 40	R 810477	–	–	8 - 40	–	–	2	197	0.22

Table showing specifications by the manufacturer. It is recommended to primarily use in medium performance range (approx. 1/3 to 4/5 of rated capacity). If you regularly worked close to the limit of load (maximum capacity), a larger model or tool might be more advisable.

All technical data without guarantee, errors and omissions excepted.