1FK7042-2AK71-1CH0

What type of motor is this component?

It is a Siemens SIMOTICS S-1FK7 compact permanent-magnet synchronous motor designed for precise servo-motion applications.

What is the rated operating speed?

The motor has a rated speed of 6,000 rpm at a 100 K winding temperature rise.

What is the maximum permissible speed?

The maximum permissible mechanical and inverter-controlled speed is 9,000 rpm.

What torque does the motor provide?

It provides a rated torque of 1.5 Nm, a static torque of 2.5 Nm at 100 K and up to 3.0 Nm at 60 K. Its limiting maximum torque is 10.5 Nm.

What are the motor's current ratings?

The rated current is 2.5 A. Stall current is 3.55 A at 100 K and 4.40 A at 60 K, while the limiting maximum current is 15.3 A.

Does the motor include a holding brake?

Yes. Siemens 1FK7042-2AK71-1CH0 incorporates a permanent-magnet holding brake with a holding torque of 4.0 Nm.

What electrical supply does the holding brake require?

The brake requires a 24 V DC supply with a tolerance of ±10% and has a coil current of 0.5 A.

How quickly does the holding brake operate?

The specified opening time is 30 ms and the closing time is 70 ms. The maximum braking work is 150 J.

What encoder is fitted?

The motor is fitted with an AM24DQI absolute encoder. It provides 24-bit single-turn resolution and 12-bit multi-turn measurement across 4,096 revolutions.

What degree of ingress protection does the motor provide?

The motor is rated IP64, meaning its enclosure is dust-tight and protected against water splashes from any direction.

How is the motor cooled?

It uses natural cooling, so its thermal performance depends on correct installation, ambient conditions and adequate airflow around the housing.

What mounting arrangement does the motor use?

It uses an IM B5 flange-mounting arrangement and is also suitable for the associated IM V1 and IM V3 mounting orientations.

What type of shaft does it have?

The standard motor configuration has a plain shaft end. The mechanical coupling should therefore be selected to match a smooth, keyless shaft.

Does the motor include temperature monitoring?

Yes. A Pt1000 temperature sensor is incorporated for monitoring the motor temperature.

What is the approximate motor weight?

The motor has a stated net weight of approximately 5.3 kg.

What are the key mechanical characteristics?

This compact motor has a shaft height of 48 mm, a moment of inertia of 3.200 kgcm² and a shaft torsional stiffness of 11,400 Nm/rad.

What electrical connections are provided?

Rotatable connectors are provided for both power and signal connections, allowing their orientation to be adjusted during installation.

What is the motor's stated efficiency?

The stated efficiency is 89.0% under the specified rated operating conditions.

What applications is this motor commonly suited to?

Its compact construction, absolute encoder, high rotational speed and holding brake make it suitable for precision positioning, machine tools, packaging equipment, handling systems and automated production machinery.

What should be checked before replacing an existing motor?

Confirm the complete ordering code, rated speed, torque, current, encoder type, brake configuration, shaft style, flange arrangement, connector orientation and compatible drive parameters before installation.