Airtac SE125 Standard Cylinder SE125X325
The AirTAC Airtac SE125 Standard Cylinder SE125X325 is a genuine double-acting ISO 15552 / VDMA 24562 profile-barrel air cylinder with a Ø125mm bore and 325mm stroke, PT1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke325 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SE125 Standard Cylinder SE125X325
The AirTAC SE125X325 is a double-acting, single-rod ISO 15552 profile cylinder engineered for heavy-duty pneumatic tasks. It delivers a substantial 6136 N push force at 0.5 MPa and utilizes a PT1/2 port paired with a robust Ø32 mm piston rod. Its square extruded aluminum barrel omits external tie rods, yielding a compact, corrosion-resistant body that mounts flush against machine frames while retaining standardized ISO 15552 dimensions for seamless retrofitting.
Field-adjustable pneumatic cushioning at both ends allows technicians to tune end-of-stroke deceleration via a set screw, softening hard impacts when moving heavy loads at speeds up to 30-500 mm/s. This specific SKU lacks the built-in magnet option, meaning it is not wired for CMSE or DMSE position sensing out of the box.
Airtac SE125 Standard Cylinder SE125X325 Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X325 |
|---|---|
| Series | SE ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 325 mm |
| Acting type | Double acting |
| Port size | PT1/2 |
| Rod thread | M27×2 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C (0–150 °C with FKM seals) |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SE series datasheet and ISO 15552 / VDMA 24562 dimensions. Confirm against the product label before installation. Port options: PT (standard) / G (BSPP).
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SE125 Standard Cylinder SE125X325
| SE | ISO 15552 / VDMA 24562 profile-barrel double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×325 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensor sensing. |
Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B). Seals: TPU (blank) / FKM high-temp (H) / NBR (N). Thread: PT (blank) / G. Mounting: Basic, LB, FA, FB, CA, CB, CR, TC, FTC, TCM1, TCM2. Related SE-family variants: SED (double rod), SEJ (adjustable stroke), BSE (rod lock), BSED (double-rod rod lock).
Where the Airtac SE125 Standard Cylinder SE125X325 Is Used
Automotive Stamping Press
Provides the 6136 N push force required to form sheet metal panels, utilizing the 325 mm stroke to clear bulky dies during tooling changeovers.
Heavy Mill Ejector
Ejects dense forged parts from machining fixtures, relying on the field-adjustable end cushions to decelerate the 1252 kgf maximum thrust before impact.
Large Injection Mold Clamp
Actuates heavy mold-halves on large injection molding machines, where the tie-rod-free extruded profile allows flush mounting against thick steel platens.
Is the Airtac SE125 Standard Cylinder SE125X325 the Right Cylinder?
Selecting this 125 mm bore yields the highest standard force in the SE lineup, generating 6136 N push at 0.5 MPa. If your application requires less force, stepping down to the 80 mm bore provides 2513 N push, whereas this SE125X325 is reserved for high-thrust demands like overriding heavy springs or pressing assemblies. Because this is a non-locking cylinder, it cannot hold a load in place if air pressure drops or the valve centers; for dead-load holding, consider the BSE rod-lock variant or an external pilot-operated check valve.
With a 325 mm stroke, the unsupported piston rod is highly susceptible to side-loading and bearing deflection. To prevent premature seal wear and scoring inside the barrel, an external guide rail must support the load. For replacement planning, this unit is dimensionally interchangeable with any true ISO 15552 cylinder matching the 125 mm bore, 325 mm stroke, PT1/2 port, and basic mounting footprint.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/G)
- ✓ Magnet (-S) for CMSE/DMSE sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (LB/FA/FB/CA/CB/CR/TC/FTC/TCM1/TCM2).
- check Installation by qualified personnel per AirTAC docs.
Airtac SE125 Standard Cylinder SE125X325 FAQ
The SE125X325 generates 6136 N of push force and 5734 N of pull force at 0.5 MPa. At 0.7 MPa, the push force reaches 8590 N, with an absolute maximum push of 1252 kgf at 1.0 MPa. The operational speed range for this 125 mm bore is 30-500 mm/s.
This specific SKU lacks the built-in magnet (-S) required for AirTAC CMSE reed or DMSE electronic sensors. Additionally, the adjustable air cushions only decelerate the piston near stroke end; they do not lock the rod. If dead-load holding is required during air loss, an external rod lock or the AirTAC BSE series must be used.
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