steve
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Got hold of Sime for a Carrier card for a chiller. Machine down in a factory. Received the new card in express time machine and plant now up and running fantastic service form Sime
1 month ago
1FK7040-2AK71-1CH0
Siemens 1FK7040-2AK71-1CH0 available at EU Automation. Get in touch today for a quick price.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
Siemens 1FK7040-2AK71-1CH0 (also shown as 1FK70402AK711CH0) is a SIMOTICS S-1FK7 permanent‑magnet synchronous servo geared motor configured with an NP+ planetary gearbox. Built for precise speed and position control in compact automation assemblies, it combines a high‑dynamic servo motor with a 1‑stage, 10:1 gear reduction to deliver higher output torque with controlled torsional backlash.
This variant features an AM24DQI absolute encoder (24‑bit singleturn with 12‑bit multiturn), IP64 protection, IM B5 flange mounting, natural cooling, and rotatable power/signal connectors for easier integration. It is supplied with a 24 V DC holding brake and Pt1000 temperature sensing for motor monitoring, making it well suited to high‑performance axis tasks such as packaging machinery, handling systems and general industrial motion applications where repeatable positioning and dependable holding are required.
This variant features an AM24DQI absolute encoder (24‑bit singleturn with 12‑bit multiturn), IP64 protection, IM B5 flange mounting, natural cooling, and rotatable power/signal connectors for easier integration. It is supplied with a 24 V DC holding brake and Pt1000 temperature sensing for motor monitoring, making it well suited to high‑performance axis tasks such as packaging machinery, handling systems and general industrial motion applications where repeatable positioning and dependable holding are required.
| Specification | Description |
|---|---|
| Manufacturer | Siemens |
| Part Number (MLFB) | 1FK7040-2AK71-1CH0 |
| Alternative Part Number | 1FK70402AK711CH0 |
| Product Type | SIMOTICS S-1FK7 permanent-magnet synchronous servo geared motor with integrated planetary gearbox and holding brake |
| Motor Technology | Permanent-magnet synchronous motor |
| Gearbox Type | Planetary gearbox NP+ (NP 025) |
| Gear Ratio | 10:1 (1-step) |
| Mounting Arrangement | IM B5 (IM V1 / IM V3 compatible) |
| Degree of Protection | IP64 |
| Cooling | Natural cooling |
| Encoder / Feedback | AM24DQI absolute encoder: 24-bit single-turn (16,777,216 counts) + 12-bit multi-turn (4,096 revolutions) |
| Temperature Monitoring | Pt1000 temperature sensor |
| Rated Torque (Motor, 100 K) | 1.1 Nm |
| Maximum Torque (Motor) | 5.1 Nm |
| Torque Constant | 0.68 Nm/A |
| Rated Current | 1.90 A |
| Stall Current | 1.9 A (100 K); 2.35 A (60 K) |
| Maximum Current | 7.7 A |
| Rated Speed (Motor, 100 K) | 6000 rpm |
| Motor Speed S1 (with gearbox) | 3900 rpm |
| Max. Permissible Speed | 9000 rpm (inverter); 9000 rpm (mechanical) |
| Voltage Constant (20 °C) | 43.4 V/1000 min⁻¹ |
| Winding Resistance (20 °C) | 2.87 Ω |
| Rotating Field Inductance | 16.5 mH |
| Electrical Time Constant | 5.70 ms |
| Mechanical Time Constant | 3.00 ms |
| Number of Poles | 8 |
| Motor Moment of Inertia | 2.410 kg·cm² |
| Gearbox Moment of Inertia | 0.490 kg·cm² |
| Output Torque S1 (Gearbox) | 45 Nm |
| Output Torque Max. (Short-time) | 90 Nm |
| Gearbox Efficiency | 0.97 |
| Torsional Backlash | 8 arcmin |
| Output Shaft Loads (Max.) | Radial: 2800 N; Axial: 0 N |
| Holding Brake Type | Permanent-magnet brake |
| Holding Brake Supply | 24 V DC ±10% |
| Holding Brake Coil Current | 0.5 A |
| Holding Brake Holding Torque | 4.0 Nm |
| Holding Brake Switching Times | Opening: 70 ms; Closing: 30 ms |
| Max. Braking Work | 150 J |
| Shaft / Shaft End | Plain shaft; gearbox shaft end with feather key |
| Connectors | Rotatable connectors for power and signals; connector size 1 |
| Housing Colour | Standard anthracite (RAL 7016) |
| Net Weight (Motor) | 7.7 kg |
| Gearbox Weight | 3.80 kg |
| Website Description | Siemens 1FK7040-2AK71-1CH0 is a compact SIMOTICS S-1FK7 servo geared motor combining a high-dynamic permanent-magnet servo motor with an NP+ planetary gearbox for increased output torque and controlled motion. It includes an absolute multi-turn encoder for precise position feedback, an IP64 enclosure for robust machine integration, and a 24 V DC holding brake for secure axis holding during standstill. |
What type of motor is this?
It is a permanent-magnet synchronous servo motor supplied as a servo geared motor assembly in the SIMOTICS S-1FK7 family, intended for precise speed and position control applications.
Does it include a gearbox, and what style is it?
Yes. It is supplied with an NP+ planetary gearbox (designation NP 025) mounted to the motor.
What is the gear ratio and how many stages does the gearbox have?
The gearbox ratio is 10:1 and it is a single-stage (1-step) planetary gearbox.
What continuous output torque can I expect from the geared unit?
The specified output torque in S1 duty is 45 Nm at the gearbox output.
What short-time peak output moment is specified for the gearbox?
The specified maximum output moment (short-time) is 90 Nm.
What backlash is specified for the gearbox?
The torsional backlash is specified as 8 arcminutes.
Which feedback device (encoder) is fitted?
It is fitted with an AM24DQI absolute encoder: 24-bit single-turn (16,777,216 steps) plus 12-bit multi-turn, with a multi-turn range of 4,096 revolutions.
Is a holding brake included, and what are its key characteristics?
Yes, a permanent-magnet holding brake is included. It is supplied at 24 V DC ±10%, with a coil current of 0.5 A and a holding torque of 4.0 Nm. Typical switching times are 30 ms (closing) and 70 ms (opening), and the maximum braking work is specified as 150 J.
What is the degree of protection of the motor assembly?
The motor degree of protection is IP64.
What mounting arrangement is used?
The motor mounting is IM B5 (also referenced with IM V1 / IM V3 variants depending on installation orientation).
Are the power and signal connections fixed or adjustable?
The unit uses separate connectors for power and signals, and they are specified as rotatable to help suit cable routing constraints.
Is temperature monitoring included?
Yes. A Pt1000 temperature sensor is included for temperature monitoring.
What speeds are permissible for the motor input side?
The maximum permissible speed is specified as 9,000 rpm (mechanical) and 9,000 rpm (with inverter). The limiting value for temporary input speed is specified as 7,000 rpm.
What is the typical maximum current and peak motor torque?
The maximum current is specified as 7.7 A, and the maximum (peak) motor torque is specified as 5.1 Nm.
What are the approximate weights of the motor and gearbox?
The motor net weight is specified as 7.7 kg, and the gearbox weight is specified as 3.8 kg.
What shaft configuration is provided at the gearbox output?
The gearbox output shaft end is specified with a feather key. If you need to match coupling or pulley hardware, confirm the shaft and key dimensions against the machine’s existing mechanical interface.
What is the full identifier I should use when matching an existing unit?
For exact matching, use the full MLFB including suffixes. This unit is commonly identified as Siemens 1FK7040-2AK71-1CH0 (including the geared motor configuration shown on the data sheet).
- Precision positioning axes in automated assembly and pick-and-place stations
- High-torque, low-speed rotary drives for indexing tables and dial conveyors using the integrated planetary gearbox
- Servo-driven infeed, outfeed and transfer units on packaging machinery for accurate stop-and-go motion
- Actuation of clamps, grippers and rotary fixtures where repeatable holding is required via the integrated brake
- Carton erecting, sealing and labelling equipment requiring consistent speed control and rapid acceleration/deceleration
- Material handling modules such as diverters, lifters and buffer mechanisms needing compact, geared servo power
- Printing and converting machines for controlled web handling components such as nip rollers and feeder systems
- Electronics and light industrial manufacturing lines for synchronised motion on multiple axes
- Test rigs and end-of-line functional testers requiring accurate speed/torque regulation with absolute position feedback
- Compact automation cells where space is limited but robust torque performance and positional accuracy are essential
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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