1FK7042-5AF71-1PH0

What type of motor is this unit?

This unit is a Siemens SIMOTICS S-1FK7 Compact permanent-magnet synchronous servo motor. It is intended for precise motion, positioning, and speed-control applications in industrial machinery.

What are the motor’s main performance ratings?

The motor has a rated speed of 3,000 rpm, a rated torque of 2.6 Nm at a 100 K temperature rise, and a rated current of 1.9 A. Its listed power rating is approximately 0.82 kW.

Why is the motor described as a 3.0 Nm model when its rated torque is 2.6 Nm?

The 3.0 Nm figure refers to static torque at a 100 K temperature rise. Continuous rated torque at 3,000 rpm is 2.6 Nm, so the two figures describe different operating conditions.

What is the maximum permissible operating speed?

The maximum mechanically permissible speed is 9,000 rpm. When operated through an inverter, the stated maximum permissible speed is 6,500 rpm. Actual operating limits also depend on the drive configuration and machine design.

Does this servo motor include a holding brake?

Yes. Siemens 1FK7042-5AF71-1PH0 includes a permanent-magnet holding brake rated at 4.0 Nm. The brake uses a 24 V DC supply with a tolerance of plus or minus 10% and has a coil current of 0.5 A.

What feedback device is fitted to the motor?

The motor is equipped with an R14DQ resolver. It provides 14-bit resolution, equivalent to 16,384 positions, and uses an internal two-pole configuration.

What type of shaft does the motor have?

This configuration has a plain shaft end. Couplings, pulleys, gearboxes, and other mechanical interfaces should be checked for the correct bore, fastening method, alignment, and load requirements.

How is the motor cooled?

The motor uses natural cooling and does not rely on an integral forced-air fan. Installation should allow adequate airflow around the housing and avoid conditions that could trap excessive heat.

What degree of environmental protection does the housing provide?

The motor has an IP64 degree of protection. This indicates protection against dust ingress and splashing water, although the complete installation must also account for connector sealing, shaft interfaces, and environmental exposure.

Which mounting arrangement is used?

The motor is designed according to IM B5 and may also be installed in the corresponding IM V1 or IM V3 orientations when the mechanical arrangement and application conditions permit.

Does the motor include temperature monitoring?

Yes. A KTY84 temperature sensor is installed in the stator winding to provide motor temperature information to a compatible drive or control arrangement.

What electrical connector arrangement is provided?

Separate rotatable connectors are provided for power and signal connections. The connector size is listed as size 1, and the mating cables must match the motor’s power, resolver, brake, and temperature-sensor configuration.

What is the motor’s maximum torque and current?

The motor data lists a maximum torque of 10.5 Nm and a maximum current of 7.4 A. With the recommended motor-module ratings of 3 A continuous and 6 A maximum, the listed achievable maximum torque is 8.40 Nm.

What is the approximate weight of the motor?

The net motor weight is approximately 5.4 kg, or about 11.9 lb. The final machine design should also account for attached cables, connectors, couplings, and mounting hardware.

What should be checked when replacing an existing servo motor with this model?

Confirm the full order code, mounting flange, shaft height, shaft style, resolver type, holding-brake configuration, connector arrangement, speed and torque ratings, drive current, and mechanical dimensions. Matching only the power or torque rating is not sufficient for direct interchangeability.