Iron-core linear motor
Yaskawa SGLF / SGLFW2 iron-core linear iron-core linear motor
Single-sided iron-core moving-coil linear servomotors with resin-encapsulated coils and modular magnet tracks.
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Select everything you need. A motor, drive and gearbox can be specified together as one axis.
Key specifications
| Peak force (max) | 7,560 N |
|---|---|
| Continuous force (max) | 2,520 N |
| Supply | 200 V and 400 V classes |
Summarised in our own words from Yaskawa Electric Corporation's published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1 · Source 2
Notes on this data
SGLFW2 rated 45-2,520 N, peak 135-7,560 N from Sigma-7 400 V catalogue. Max speed not extracted.
Specify Motion is not affiliated with Yaskawa Electric Corporation. Yaskawa and SGLF / SGLFW2 iron-core linear are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Yaskawa SGLF / SGLFW2 iron-core linear replacement and alternative options
Use these supply-network options as a starting point for an engineering check. We can also help source the original Yaskawa part. Published series figures do not establish an exact-model or drop-in replacement: confirm ratings, fit, interfaces and approvals for your application.
High-force iron-core linear motors in five widths with optional water cooling, reaching several kN continuous.
| Published maximum | SGLF / SGLFW2 iron-core linear | AKM |
|---|---|---|
| Peak force | 7,560 N | 12,884.3 N meets or exceeds |
| Continuous force | 2,520 N | 6,190.1 N meets or exceeds |
| Speed | — | 5 m/s |
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
Typical applications
What an iron-core linear motor is
An iron-core linear motor is a direct-drive linear motor whose coils are wound on a laminated iron core in the moving forcer, running over a flat track of permanent magnets. Current in the coils interacts with the magnet field to produce thrust directly, with no screw, belt or gearbox. The iron core concentrates the magnetic flux, so force density is high and heat can be conducted away through the core. Position feedback comes from a linear encoder.
When engineers choose an iron-core linear motor
Choose an iron-core linear motor for high continuous force, high acceleration and long strokes, such as machine tools, gantries and heavy automation. Direct drive removes backlash and wear in the transmission. The trade-offs are cogging, which causes small force ripple, and a strong attraction force between forcer and magnet track, often many times the rated thrust, which must be carried by the guides. For very smooth, low-ripple motion with light loads, an ironless motor may suit better.
How to specify the Yaskawa SGLF / SGLFW2 iron-core linear
Send these with your enquiry and an engineer can confirm the right SGLF / SGLFW2 iron-core linear variant or an equivalent:
- Peak and continuous force (N)
- Stroke and speed (mm, m/s)
- Moving mass and acceleration (kg, m/s²)
- Attraction force and guide load capacity (N)
- Cooling: natural, forced air or water
- Bus voltage and drive current (V, A)
- Linear encoder type and resolution
Common mistakes to avoid
- Sizing guides without including the magnetic attraction force
- Ignoring cogging in smooth-scan or low-speed applications
- Leaving out heat dissipation into the machine structure
- Allowing ferrous debris to collect on the open magnet track
Yaskawa SGLF / SGLFW2 iron-core linear: frequently asked questions
Can you help replace Yaskawa SGLF / SGLFW2 iron-core linear or source the original?
Send the full model code, quantity and required date. Our engineers can check original-part availability and assess suitable alternatives, including supply-network options where appropriate. We confirm compatibility and any changes needed before recommending a replacement.
What is the Yaskawa SGLF / SGLFW2 iron-core linear?
Single-sided iron-core moving-coil linear servomotors with resin-encapsulated coils and modular magnet tracks. Published series figures include peak force 7,560 N, continuous force 2,520 N. It is made by Yaskawa Electric Corporation; Specify Motion can help source it or propose an equivalent.
Who makes the Yaskawa SGLF / SGLFW2 iron-core linear?
The Yaskawa SGLF / SGLFW2 iron-core linear is made by Yaskawa (Yaskawa Electric Corporation) and is listed here for engineers comparing options. Specify Motion is not affiliated with Yaskawa Electric Corporation; brand names are used only to identify the product.
What is the peak force of the Yaskawa SGLF / SGLFW2 iron-core linear?
The published series maximum peak force is 7,560 N. Individual models and sizes in the SGLF / SGLFW2 iron-core linear 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.
Is there an alternative to the Yaskawa SGLF / SGLFW2 iron-core linear?
We can assess suitable replacement options. On published figures, Akribis Systems AKM is options to assess from our supply network. An engineer confirms the fit against your application before recommending anything.
What is the difference between iron-core and ironless linear motors?
Iron-core motors wind coils on an iron core, giving higher force and better heat removal, but with cogging and a strong magnetic attraction to the track. Ironless motors have coils without iron running between two rows of magnets, so there is no cogging or attraction, giving very smooth motion with lower force and less heat capacity.
Why does an iron-core linear motor need strong guides?
The iron core is strongly attracted to the magnet track, typically with a force several times the rated thrust. That load acts on the guide bearings all the time, even at rest. Guides must be sized for payload, process forces and this attraction, or bearing life will be much shorter than expected.
Further reading: How to select a linear motor · Linear actuators
Other iron-core linear motor series
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