Airtac SE125 Standard Cylinder SE125X240S
The AirTAC Airtac SE125 Standard Cylinder SE125X240S is a genuine double-acting ISO 15552 / VDMA 24562 profile-barrel air cylinder with a Ø125mm bore and 240mm 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
- Stroke240 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SE125 Standard Cylinder SE125X240S
The AirTAC SE125X240S is a double-acting single-rod profile cylinder built to the ISO 15552 standard. It features a robust 125 mm bore and a 240 mm stroke, generating a substantial 6136 N push force at 0.5 MPa. The extruded aluminum barrel design omits external tie rods entirely, yielding a compact footprint that mounts flush against machine frames while resisting corrosion.
Equipped with a built-in position magnet (S option), this unit seamlessly interfaces with AirTAC CMSE reed and DMSE electronic sensors for precise end-of-stroke detection. The field-adjustable pneumatic cushioning at both ends allows technicians to tune the deceleration of the heavy 32 mm rod via a set screw, softening hard mechanical impacts at high cycling speeds.
Airtac SE125 Standard Cylinder SE125X240S Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X240S |
|---|---|
| Series | SE ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 240 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 SE125X240S
| SE | ISO 15552 / VDMA 24562 profile-barrel double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×240 | 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 SE125X240S Is Used
Injection Mold Platen Ejection
Drives heavy ejector pins in injection molding machines, utilizing the 6136 N push force at 0.5 MPa to reliably break large plastic parts free from deep mold cavities.
Hydraulic Press Material Staging
Indexes thick steel blanks into a hydraulic press line, where the 32 mm hard-chrome rod and 125 mm bore provide the sheer axial strength needed to move dense billets.
Automotive Frame Straightening
Applies steady, high-tonnage clamping pressure during automotive chassis straightening fixtures, relying on the 240 mm stroke to accommodate varying frame widths.
Is the Airtac SE125 Standard Cylinder SE125X240S the Right Cylinder?
Selecting the SE125X240S is ideal when your application demands up to 6136 N of push force at 0.5 MPa. If your load requirements are lighter, stepping down to the 100 mm bore provides 3927 N of push, saving valuable space and air consumption. As the largest standard bore in the SE lineup, there is no larger neighbor to step up to within this series; for loads exceeding 1252 kgf at 1.0 MPa, you would need to evaluate a multi-cylinder mechanical configuration or a different actuator technology entirely.
This 125 mm bore features a PT1/2 port and M27x2 rod thread, handling heavy loads at a controlled speed range of 30-500 mm/s. Remember that the adjustable air cushion only decelerates the piston near the stroke ends; it does not function as a locking device. If your machinery must hold a vertical load safely without live air pressure, you must integrate an external pilot-operated check valve or specify a BSE series rod-lock cylinder. Because the 240 mm stroke is below the 300 mm threshold, severe rod-bearing bending is less of a concern, but external guidance is still recommended for high lateral stresses.
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 SE125X240S FAQ
The SE125X240S delivers a push force of 6136 N and a pull force of 5734 N at 0.5 MPa. At 0.7 MPa, the push force increases to 8590 N, with a maximum push capacity of 1252 kgf at 1.0 MPa. The operating speed range for this 125 mm bore is 30-500 mm/s.
Yes, the SE125X240S is dimensionally interchangeable per ISO 15552 standards, allowing it to serve as a drop-in replacement for other ISO 15552 profile cylinders using standard mounting accessories. The built-in -S magnet also allows you to mount AirTAC CMSE reed or DMSE electronic sensors directly into the extruded barrel grooves.
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