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 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).

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.