Airtac SE125 Standard Cylinder SE125X250CAY
The AirTAC Airtac SE125 Standard Cylinder SE125X250CAY is a genuine double-acting ISO 15552 / VDMA 24562 profile-barrel air cylinder with a Ø125mm bore and 250mm 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
- Stroke250 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SE125 Standard Cylinder SE125X250CAY
The AirTAC SE125X250CAY is a double-acting single-rod ISO 15552 profile cylinder engineered for heavy-duty pneumatic tasks. It generates a substantial 6136 N of push force at 0.5 MPa and up to 8590 N at 0.7 MPa, making it well-suited for high-load industrial actuation. The square extruded aluminum barrel omits external tie rods entirely, yielding a compact, corrosion-resistant body that mounts flush against machinery frames while protecting internal components from side impacts.
This specific configuration features a robust Ø32 mm piston rod with an M27x2 thread and a PT1/2 port. To manage the kinetic energy of its 125 mm bore during high-speed cycling, the cylinder incorporates field-adjustable air cushions at both ends. By turning a setscrew, technicians can tune the end-of-stroke deceleration to eliminate hard metal-on-metal banging, extending equipment lifespan without relying on fixed rubber bumpers.
Airtac SE125 Standard Cylinder SE125X250CAY Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X250CAY |
|---|---|
| Series | SE ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 250 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 SE125X250CAY
| SE | ISO 15552 / VDMA 24562 profile-barrel double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×250 | 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 SE125X250CAY Is Used
Stamping Press Ejection
Provides the 6136 N push force at 0.5 MPa required to knock heavy stamped metal panels out of progressive die sets reliably.
Injection Mold Clamping
Utilizes the field-adjustable air cushion to gently decelerate the 125 mm piston at the end of its 250 mm stroke, protecting expensive mold halves from impact shock.
Pallet Dispenser Actuation
Leverages the robust tie-rod-free extruded barrel and CA clevis mount to push empty pallets into packaging lines, handling high side-load stresses during transfer.
Is the Airtac SE125 Standard Cylinder SE125X250CAY the Right Cylinder?
Selecting this 125 mm bore cylinder is appropriate when your application requires moving heavy masses that exceed the 3927 N push force of the next size down (100 mm bore). If you need even greater thrust, stepping up is not an option as this is the largest standard SE bore available. Keep in mind that a plain double-acting SE cylinder does not hold its position or load when air pressure is lost or the directional valve is centered; the piston will drift. For gravity-loaded vertical applications requiring fail-safe holding, consider the BSE series with an integrated rod lock.
For ISO 15552 dimensional interchangeability, this model maps to a 125 mm bore, 250 mm stroke, PT1/2 port, and CA single clevis mounting accessory. Because this SKU lacks the -S magnet code, it cannot host CMSE or DMSE position sensors without modification. Since the stroke is 250 mm, the unsupported length of the Ø32 mm rod is moderate; while the M27x2 thread handles high axial stress, heavily off-center loads at full extension still necessitate an external guide to prevent rod-bearing bending.
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 SE125X250CAY FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N. The maximum push force is 1252 kgf at 1.0 MPa. The operational speed range is 30-500 mm/s.
Yes, the SE125X250CAY is dimensionally interchangeable per ISO 15552 / VDMA 24562 standards. You can use it as a drop-in replacement for other ISO 15552 profile cylinders, utilizing standard CA mounting hardware and matching PT1/2 port dimensions without altering your machine frame.
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