Siemens 1FK7080-5AF71-1AG0 Servo Motor: Technical Specifications, Product Description, Applications, and Related Models

1. Product Overview

The 1FK7080-5AF71-1AG0 is a compact synchronous servo motor in the SIMOTICS S-1FK7 series. It is designed for industrial motion-control applications that require controlled rotation, repeatable positioning, and coordinated operation with a compatible servo drive.

This model belongs to the 80 mm shaft-height class and has a rated torque of approximately 6.8 Nm at a 100 K temperature rise. Its listed operating point is 3,000 rpm, with an optimal power rating of approximately 2.14 kW. The motor uses natural cooling and an incremental SIN/COS encoder with 2048 pulses per revolution.

The AG0 configuration is identified with a plain shaft, no integrated holding brake, and IP64 protection. These details are important when choosing a replacement because other motors in the same family may use absolute encoders, different shaft designs, holding brakes, or different protection ratings.

The motor is intended to operate as part of a complete servo system. The drive, feedback wiring, mechanical transmission, controller settings, and load characteristics all influence the performance of the finished machine.

2. Brand and Product Series

The 1FK7 series is designed for industrial machinery requiring accurate motion control in a compact motor format. Different variants offer different feedback systems, shaft configurations, brake options, and enclosure ratings, allowing engineers to choose a motor that suits the mechanical and electrical requirements of a particular machine.

The complete order code should always be checked before purchasing a replacement. Two motors may share the same frame size and rated speed while differing in encoder interface, shaft dimensions, brake configuration, or protection rating.

3. Detailed Technical Parameters

The following table summarizes the main specifications for the 1FK7080-5AF71-1AG0. Dimensions are presented as installation references rather than an unverified complete three-dimensional envelope.

3.1 Rated torque and power

The motor’s rated torque is approximately 6.8 Nm at a 100 K temperature rise. Its optimal operating power is approximately 2.14 kW at 3,000 rpm.

These figures describe the motor’s operating characteristics under specified conditions. They should not be used interchangeably: rated torque, static torque, and short-duration peak torque refer to different operating conditions. Correct motor sizing requires the continuous load torque, acceleration demand, operating speed, and duty cycle to be considered together.

3.2 Incremental encoder

The AG0 configuration uses an incremental SIN/COS encoder with a 1 Vpp signal and 2048 pulses per revolution. The encoder provides incremental movement information to the servo drive, which uses the feedback for motion regulation.

Because this is an incremental feedback arrangement, the control system’s reference-position procedure and feedback interface must be compatible with the machine’s requirements. A motor with an absolute encoder may require a different drive configuration and should not be assumed to be a direct electrical replacement.

3.3 Cooling and protection

Natural cooling means that the motor does not rely on a separate motor-mounted cooling fan in its standard configuration. Adequate heat dissipation is still required, especially during continuous operation or frequent acceleration cycles.

The IP64 rating provides protection against dust ingress to the specified level and against water splashes under defined test conditions. It does not indicate suitability for immersion or high-pressure washdown.

3.4 Dimensions and weight

The motor belongs to the 80 mm shaft-height class, and its listed weight is approximately 10.003 kg.

The shaft height is not the motor’s complete external size. The exact drawing should be used to verify the flange, mounting-hole pattern, shaft diameter, shaft extension, body length, and connector clearance. The motor-body and flange references above are not a substitute for the full mechanical drawing.

4. Product Description

The 1FK7080-5AF71-1AG0 is designed to convert electrical energy into controlled rotational movement. In a typical industrial installation, it operates with a servo drive and a motion controller. The controller provides movement commands, and the drive adjusts the motor current to produce the required torque and speed.

The incremental encoder reports changes in shaft position to the drive. This feedback supports closed-loop speed regulation and motion control. With appropriate drive configuration and machine mechanics, the motor can be used for controlled acceleration, deceleration, and repeatable positioning.

Its 80 mm frame class provides a compact solution for machinery that requires a balance between installation size and torque capability. Natural cooling simplifies the cooling arrangement, while the plain shaft can be connected to a suitable coupling or transmission component.

The absence of an integrated holding brake is a key consideration. If the motor operates a vertical axis or another mechanism that must remain stationary after power is removed, a separate load-holding solution may be necessary. This should be designed around the actual load and machine safety requirements.

The motor is not a standalone motion-control system. Correct operation depends on the compatible drive, feedback wiring, cable routing, mechanical alignment, controller settings, and load conditions.

5. Main Applications

5.1 CNC machine tools

The motor can be considered for feed axes, positioning mechanisms, and auxiliary movements in CNC machinery. Its feedback-based control supports regulated speed and repeatable movement when the drive and mechanical system are correctly configured.

For machine-tool applications, the motor must be sized for the required feed force, acceleration, transmission ratio, and continuous duty. Mechanical rigidity and the condition of the coupling also affect positioning performance.

5.2 Packaging and filling equipment

Packaging machines often need synchronized movement of product feeders, rollers, conveyors, and indexing mechanisms. A servo motor can control these movements according to a programmed cycle, helping the machine maintain consistent timing and repeatability.

The 1FK7080-5AF71-1AG0 may be considered where its speed and torque characteristics meet the application’s requirements. The encoder interface must also match the control system.

5.3 Automated assembly lines

Automated assembly systems use servo motors to position components, move slides, operate transfer units, and coordinate rotary tables. Feedback-based motion control helps the machine repeat movement sequences across multiple production cycles.

When selecting a motor for assembly machinery, engineers should consider the moving mass, cycle time, required positioning accuracy, and frequency of acceleration and deceleration.

5.4 Material handling and transfer mechanisms

Servo motors are commonly used to position trays, transfer parts between stations, and control automated handling mechanisms. The required motor torque depends on the load, friction, transmission ratio, and acceleration profile.

The lack of an integrated holding brake must be considered if the application involves a vertical axis or a load that could move when power is removed.

5.5 Printing and converting machinery

Printing and converting equipment may use servo motors to control rollers, feed materials, and synchronize different machine sections. Accurate motion coordination helps maintain consistent material movement.

The suitability of this model depends on the required speed range, load inertia, mechanical transmission, and control architecture.

5.6 Textile machinery

Textile machinery can use servo motors for controlled feeding, winding, positioning, and synchronized movement. The motor must be selected according to the load profile and the duration of continuous operation.

Where the process involves frequent speed changes, the thermal duty cycle and acceleration torque should be assessed carefully.

5.7 Inspection and testing equipment

Automated inspection systems may use servo motors to position components, fixtures, or test mechanisms. Repeatable movement helps coordinate inspection sequences and bring parts to defined locations.

The achievable system accuracy depends on the motor feedback, mechanical rigidity, control tuning, and any external measurement equipment.

5.8 Rotary indexing and positioning systems

Rotary indexing equipment requires controlled angular movement and predictable stopping positions. The motor can be considered for applications where its torque, speed, and feedback arrangement match the required motion profile.

For applications requiring absolute position information immediately after power-up, check whether an incremental encoder is appropriate for the control system or whether an absolute-encoder configuration is required.

6. Product Advantages

6.1 Closed-loop motion control

The incremental encoder supplies movement feedback to the servo drive, supporting controlled speed and position regulation. This is useful for applications where movement must follow a programmed sequence rather than simply run at a fixed speed.

6.2 Compact 80 mm frame

The 80 mm shaft-height class provides a compact motor format for industrial machinery. It can help machine designers balance available installation space with the torque and speed required by the mechanism.

6.3 Natural cooling

Natural cooling avoids the need for a separate motor-mounted cooling fan in the standard configuration. This can simplify the installation and reduce auxiliary components, provided the motor has sufficient heat-dissipation space.

6.4 Suitable rated speed for automated machinery

The 3,000 rpm rated speed makes the motor a potential choice for feed mechanisms, positioning axes, and automated equipment requiring controlled rotation. Actual performance depends on the load, drive, and permitted operating range.

6.5 Plain-shaft mechanical connection

The plain shaft can be used with a suitable coupling or other transmission component. This arrangement can simplify mechanical integration when the driven equipment is designed for the corresponding shaft interface.

The coupling must be compatible with the shaft dimensions, torque, speed, and alignment requirements.

6.6 Incremental feedback

The SIN/COS encoder provides incremental feedback that can be used for closed-loop motion control. It is appropriate for systems designed around a compatible incremental feedback interface.

Before replacement, confirm the encoder signal type, connector, cable, and controller configuration.

6.7 Industrial protection

The IP64 rating provides defined protection against dust ingress and water splashes. It is suitable only where the environmental conditions remain within the motor’s specified limits.

6.8 Practical maintenance and replacement planning

The complete model number helps maintenance teams identify the correct encoder and shaft configuration. Keeping the motor’s nameplate information, dimensional drawing, and drive settings on record can simplify future servicing.

7. Five Related Models in the Same Series

The following models are closely related to the 1FK7080 platform. The main differences concern encoder type, shaft design, and protection rating.

These are related configurations, not guaranteed direct replacements. Confirm the exact order code, electrical characteristics, shaft arrangement, connector type, and protection rating before selecting a substitute.

Comparison and selection guidance

• 1FK7080-5AF71-1AG2: A close alternative when the application needs incremental feedback and a plain shaft, with a different protection configuration.

• 1FK7080-5AF71-1EG0: Worth considering if the drive system requires an EnDat absolute encoder.

• 1FK7080-5AF71-1DA0: A candidate for a system that uses the specified DRIVE-CLiQ feedback interface and a fitted-key shaft.

• 1FK7080-5AF71-1FA2: Relevant when an absolute encoder with DRIVE-CLiQ is required and the machine uses a fitted-key shaft.

• 1FK7080-5AF71-1AG8: Similar incremental-feedback configuration with a different protection specification.

8. Five Other Models to Consider from the Same Brand

These additional models cover different frame sizes and servo-motor families. They are comparison candidates, not a verified ranking of the brand’s most popular models.

The exact specifications of these models depend on their complete order codes. Their dimensions and weights should be taken from their individual technical drawings and product data rather than inferred from the model family.

9. Technical Comparison: Main Selection Factors

10. Installation and Maintenance

Mechanical installation

Check the mounting flange, mounting-hole pattern, shaft extension, and coupling dimensions before installation. Correct alignment helps reduce vibration, bearing loads, and premature wear.

The motor and coupling must be supported adequately, and sufficient clearance should be allowed for connectors and cables.

Electrical connection

Confirm the servo drive’s compatibility with the motor and its incremental encoder. Verify the power and feedback cable types, connector pinout, and cable condition before commissioning.

Electrical work should be performed only after appropriate power isolation and safety procedures have been followed.

Encoder and positioning

Check the feedback wiring and the controller’s encoder configuration if the motor experiences positioning errors or feedback faults. Since this model uses incremental feedback, confirm that the machine’s reference-position and homing procedure are appropriate for its operation.

Thermal management

Monitor operating temperature during representative machine cycles. Excessive continuous load, frequent acceleration, unsuitable drive settings, or inadequate heat dissipation may lead to overheating.

Routine inspection

Inspect the motor mounting, coupling, connectors, cables, and driven mechanism regularly. Unusual vibration, noise, or inconsistent motion should be investigated to determine whether the issue originates in the motor, drive, coupling, gearbox, or machine structure.

Replacement planning

Record the complete model number, nameplate information, drive configuration, feedback wiring, and mounting dimensions. These records help maintenance teams identify a compatible replacement and reduce commissioning time.

11. Final Summary

The 1FK7080-5AF71-1AG0 is a compact synchronous servo motor in the SIMOTICS S-1FK7 series. Its principal characteristics include approximately 6.8 Nm rated torque at a 100 K temperature rise, 3,000 rpm rated speed, 2.14 kW optimal power, incremental SIN/COS encoder feedback, a plain shaft, natural cooling, no integrated holding brake, and IP64 protection.

The motor is suitable for consideration in CNC equipment, packaging machinery, automated assembly systems, material-handling mechanisms, printing equipment, textile machinery, and positioning systems where its operating characteristics meet the application’s requirements.

Its key advantages include feedback-based motion control, compact construction, natural cooling, and straightforward integration with a suitable mechanical coupling. The most important selection considerations are the encoder interface, shaft dimensions, mounting arrangement, required torque, operating speed, thermal duty cycle, and environmental protection.

The listed weight is approximately 10.003 kg. For installation or replacement, use the exact dimensional drawing to confirm the motor’s full external dimensions and mounting details. A related model should only be selected after verifying that its mechanical configuration, feedback system, and electrical characteristics are compatible with the existing machine.