Airtac SE125 Standard Cylinder SE125X250
The AirTAC Airtac SE125 Standard Cylinder SE125X250 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 SE125X250
The AirTAC SE125X250 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, utilizing a 125 mm bore and a 32 mm hard-chrome steel rod. Designed to operate at speeds of 30-500 mm/s, it provides the robust thrust required for demanding industrial cycles.
This model features a square extruded aluminum barrel without external tie rods, making it highly corrosion-resistant and easy to mount flush against machine frames. Field-adjustable air cushioning at both ends allows you to tune the deceleration of the 250 mm stroke via a set screw, softening hard end stops to protect your tooling. Since this specific SKU lacks the -S magnet option, it does not support CMSE or DMSE position sensing out of the box.
Airtac SE125 Standard Cylinder SE125X250 Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X250 |
|---|---|
| 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 SE125X250
| 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 SE125X250 Is Used
Injection Molding Clamp
Provides 6136 N of thrust at 0.5 MPa to securely hold large injection mold halves together during plastic injection cycles.
Pallet Stopper Gate
Acts as a heavy-duty stopper arm in high-capacity palletizing lines, using its 250 mm stroke to extend and block fully loaded pallets.
Metal Stamping Ejector
Delivers robust 8590 N push force at 0.7 MPa to eject thick steel blanks from heavy stamping presses without faltering.
Is the Airtac SE125 Standard Cylinder SE125X250 the Right Cylinder?
When sizing your pneumatic system, compare this 125 mm bore's 6136 N push at 0.5 MPa against the next size down, the 100 mm bore, which provides 3927 N of push force. If your application requires even greater thrust, stepping up is not possible as 125 mm is the largest standard SE bore available. The PT1/2 port and M27x2 rod-end thread are fixed by this bore size, ensuring high structural integrity for heavy loads.
Because this is a standard ISO 15552 profile cylinder, it serves as a direct drop-in replacement for other ISO 15552 cylinders using identical mounting hardware like FA front flanges or TC center trunnions. Remember that a plain SE cylinder will drift and cannot hold a load if air pressure is lost or the valve is centered; if your process requires position holding without live pressure, consider the BSE rod-lock variant. For this 250 mm stroke, the 32 mm rod handles significant side loads, but you should still use an external guide for any heavy off-center loads.
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 SE125X250 FAQ
The SE125X250 generates 6136 N of push force and 5734 N of pull force at 0.5 MPa. At 0.7 MPa, the push force increases to 8590 N. The absolute maximum push force is 1252 kgf when operating at the 1.0 MPa pressure limit.
This specific SKU is configured without the built-in magnet option (-S), so it cannot support AirTAC CMSE reed or DMSE electronic sensors directly. If your application requires position feedback, you must select the SE125X250S variant or add external mechanical sensors.
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