Meet the robust IR-F 85 inrunner motor, suitable for a wide range of applications. The torque motor series is available in different stack heights with continuous torque values from 1.3Nm to 6.4Nm and peak torques up to 7.9Nm.
The IR-F series is designed for heavy industrial applications that require reliability and high performance.
Types
High Torque Values
Durable and Sustainable
High Precision
Energy Efficient
About the IR-F 85 Inrunner Motors
The IR-F 85 brushless inrunner motors combine the latest direct drive technology with a robust and compact design, making them ideal for industrial applications that require precision and reliability.
Whether it is the IR-F 85-25, IR-F 85-50 or IR-F 85-75, these motors offer unparalleled performance for demanding tasks.
Smooth and precise operation
These inrunner torque motors provide extremely smooth and precise operation, which is crucial for advanced automation systems and rugged industrial machines. The excellent thermal properties and low cogging ensure that these engines can perform under the toughest conditions without sacrificing efficiency.
The IR-F 85 motors are equipped with high-quality magnets. This makes them not only powerful but also durable and suitable for long-term use in harsh environments.
Details Inrunner Motor
IR-F 85-25
| Continuous torque (*) | Between 1.3 Nm and 1.9 Nm |
| Peak torque (**) | 3.5 Nm |
| Pole pairs | 7 |
| Rotor Inertia | 99.5 kg.mm2 |
| Motor type Max DC bus Voltage | 60 VDC |
IR-F 85-50
| Continuous torque (*) | Between 2.7 Nm and 4 Nm |
| Peak torque (**) | 5.3 Nm |
| Pole pairs | 7 |
| Rotor Inertia | 199 kg.mm2 |
| Motor type Max DC bus Voltage | 60 VDC |
IR-F 85-75
| Continuous torque (*) | Between 4.3 Nm and 6.4 Nm |
| Peak torque (**) | 7.9 Nm |
| Pole pairs | 7 |
| Rotor Inertia | 298 kg.mm2 |
| Motor type Max DC bus Voltage | 60 VDC |
(*) @ 140 °C coil temp / (**) 5 K/sec temp increase rate
More information
For more information about the IR-F 85 series and to find the best fit for your application, please fill out our contact form. Our engineering team is ready to assist you with detailed specifications and customized solutions.
Didn’t find your size? Ask us about custom options
In addition to the standard sizes of the IR-F series, we also have other form factors and dimensions (e.g. D77 and D125) in development or production. Don’t see the size you’re looking for? Get in touch, there’s a good chance we already have what you need.
If needed, we can also develop a completely application-specific motor in collaboration with you. This way a fully integrated solution can be realized with optimized costs and efficiency that increases your competitiveness.
Even if your project requires only moderate annual quantities, we can provide a tailored solution developed in close collaboration with you.
Also available: Outrunner Torque Motors
We also offer Outrunner Torque Motors for applications requiring higher torque at lower rotational speeds. These motors deliver exceptional performance by positioning the rotor outside the stator.
This design allows for increased torque density, making outrunners ideal for applications demanding significant torque in compact spaces. Outrunner motors are particularly suited for industries where low-speed operation with high torque is critical.
Our MI-F outrunner torque motors series come in four build volumes (40 mm, 110 mm, 250 mm, and 485 mm), each available in three heights (25 mm, 50 mm, and 75 mm), with continues torque spanning from 0.97 Nm to 1207 Nm.
FAQ IR-F 85
In short: A torque motor is a direct-drive electric motor optimized for high torque and precise control rather than high speed.
Here are the key points:
-
Direct drive operation: Torque motors are often used without gears, belts, or transmissions. They connect directly to the load, which reduces mechanical complexity and increases precision.
-
High torque density: They are built to generate a large amount of torque relative to their size.
-
Smooth and precise motion: Because of their design, torque motors offer low cogging (jerky movement) and can hold positions very accurately, making them ideal for applications that require precision.
-
Continuous stall operation: Unlike standard motors, torque motors can run continuously at very low speeds while still delivering torque, which is especially useful in robotics, machine tools, and automation systems
The IR-F 85 delivers significantly higher torque values (1.3 Nm to 6.4 Nm continuous, up to 7.9 Nm peak) and is built for heavy-duty industrial applications, while the IR-F 52 focuses on compact precision solutions.
The rotor inertia ranges from 99.5 kg·mm² (IR-F 85-25) to 298 kg·mm² (IR-F 85-75), providing stability in demanding operations.
These motors are ideal for advanced automation systems, rugged industrial machinery, and applications requiring both high torque and long-term durability.
We offer three standard inrunner motor sizes, but our capabilities go beyond that.
Behind the scenes, we’re developing and producing additional form factors. If your preferred size isn’t listed among the standard options, we encourage you to contact us. Chances are that we already have a suitable solution in the works.
Or we can develop a custom fit together with you.
Absolutely. Our motors can be adapted in many ways, such as changing stack length, tuning torque and speed levels, or modifying mechanical and electrical interfaces.
Beyond modifying standard designs, we can also create a fully bespoke motor for your application. By working closely with our design specialists, you’ll get a tailored solution that balances performance and cost efficiency.
Get in contact with
the support team
If you would like to receive a quotation, have a question about our products, or want to know what we can do for you specifically. You can fill in our contact form. We will get back to you within 24 hours.
