Frameless torque motor
Akribis Systems ADR-P frameless torque motor
High-voltage (600 VDC) frameless torque motor kits from 110 to 360 mm with large through-bores and integrated Hall sensors; the high-torque end of the Akribis frameless range.
Key specifications
| Outer diameter | 110–360 mm |
|---|---|
| Inner diameter (max) | 229 mm |
| Ingress protection | IP00 |
| Peak torque (max) | 985.5 Nm |
| Continuous torque (max) | 365 Nm |
| Weight | 1130-46800 (rotor+stator) |
| Voltage | 600 VDC bus |
Series ranges as published; individual models vary. The full datasheet, drawings and CAD models are available on request.
Akribis Systems ADR-P model codes
Published model codes in the ADR-P range, with key figures from the manufacturer's data. Search this page for your part number, or send it to us for availability, pricing and lead time.
| Model code | Outer diameter (mm) | Description |
|---|---|---|
| ADR110-P-22 | 110 | Series or parallel winding |
| ADR110-P-45 | 110 | Series or parallel winding |
| ADR135-P-27 | 135 | Series or parallel winding |
| ADR135-P-54 | 135 | Series or parallel winding |
| ADR175-P-36 | 175 | Series or parallel winding |
| ADR175-P-72 | 175 | Series or parallel winding |
| ADR220-P-50 | 220 | Series or parallel winding |
| ADR220-P-100 | 220 | Series or parallel winding |
| ADR280-P-40 | 280 | Series or parallel winding |
| ADR320-P-80 | 320 | Series or parallel winding |
| ADR360-P-70 | 360 | Series or parallel winding |
| ADR360-P-140 | 360 | Series or parallel winding |
Options
- Hall sensors
- Optional water cooling
- Low/high speed windings
- Series/parallel connection
- Larger frames on request
- Thermal sensor (J-type thermostat or K-type/PT100)
Typical applications
What a frameless torque motor is
A frameless torque motor is a permanent-magnet brushless motor supplied as two parts, a rotor and a stator, with no housing, bearings or shaft. The machine builder mounts the rotor directly on the driven shaft and the stator in the machine structure, so the motor becomes part of the mechanism. Many have large through-holes and high pole counts, giving high torque at low speed with no gearbox. They need separate feedback, typically an encoder, and a servo drive.
When engineers choose a frameless torque motor
Choose a frameless motor when you want direct drive in a compact, integrated design, such as robot joints, gimbals, rotary tables and medical devices. Removing the gearbox eliminates backlash and improves stiffness and smoothness. The trade-offs are integration work and size: the builder supplies bearings, alignment, cooling and feedback, and torque per volume is lower than a geared solution. For off-the-shelf installation, a housed direct-drive motor may be simpler.
How to specify the Akribis Systems ADR-P
Send these with your enquiry and an engineer can confirm the right ADR-P variant:
- Continuous and peak torque (Nm)
- Speed (rpm)
- Outer diameter, bore and stack length (mm)
- Bus voltage and current (V, A)
- Thermal mounting and cooling
- Feedback type and resolution
- Air gap and concentricity tolerance (mm)
Common mistakes to avoid
- Leaving air gap and concentricity tolerances undefined
- Ignoring heat conduction from the stator into the housing
- Using an encoder with too low resolution for direct drive
- Forgetting rotor magnet attraction during assembly
Akribis Systems ADR-P: frequently asked questions
What is the Akribis Systems ADR-P?
High-voltage (600 VDC) frameless torque motor kits from 110 to 360 mm with large through-bores and integrated Hall sensors; the high-torque end of the Akribis frameless range. Published series figures include outer diameter 110 mm, outer diameter 360 mm, inner diameter 229 mm, peak torque 985.5 Nm. It is available through our supply network, and our engineers can confirm the right variant for your application.
Who makes the Akribis Systems ADR-P?
The Akribis Systems ADR-P is made by Akribis Systems available through our supply network. Send us your requirement for pricing, lead time, datasheets and CAD.
What model codes are in the Akribis Systems ADR-P range?
The ADR-P range includes ADR110-P-22, ADR110-P-45, ADR135-P-27, ADR135-P-54, ADR175-P-36, ADR175-P-72, ADR220-P-50, ADR220-P-100 and 4 more. The table on this page lists each published model code with its key figures. Send us the code you use, or the one you need to replace, and our engineers will confirm availability, lead time or the closest equivalent.
What is the outer diameter of the Akribis Systems ADR-P?
The published series minimum outer diameter is 110 mm. Individual models and sizes in the ADR-P range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
What is the difference between a frameless and a housed torque motor?
A frameless motor is only a rotor and stator; the machine provides bearings, shaft, housing and feedback. A housed direct-drive motor adds bearings, housing and encoder in a ready-to-install unit. Frameless suits compact, integrated designs where the machine already has stiff bearings; housed suits faster installation and simpler alignment.
Why use a frameless motor instead of a gearbox?
Direct drive removes backlash, wear and compliance in the gear train, giving smoother motion and stiffer control. It also allows a large hollow shaft for cabling. The trade-off is that torque must come from the motor alone, so it is larger for a given torque.
Further reading: How to select a frameless torque motor · Frameless motor sizing robot joints · Frameless and torque motors
Often compared with
Engineers specifying this series often compare it with:
Other frameless torque motor series
Spec builder
Configure Akribis Systems ADR-P
Select every part you need, answer the questions an applications engineer would ask, and see your summary before we ask for any details.
- 1Products
- 2Performance
- 3Environment
- 4Volumes
- 5Your spec
Engineer support
Need Akribis Systems ADR-P or a complete system around it?
Tell us what you need, whether it is this part, an equivalent or a complete axis built around it. An engineer will review your requirements and reply, normally within one working day.
- Reviewed by an engineer, not an autoresponder
- Like-for-like and better-fit alternatives
- Standard, modified and custom options
Prefer to configure it? Use the spec builder.