Airtac SE125 Standard Cylinder SE125X120S
The AirTAC Airtac SE125 Standard Cylinder SE125X120S is a genuine double-acting ISO 15552 / VDMA 24562 profile-barrel air cylinder with a Ø125mm bore and 120mm 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
- Stroke120 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SE125 Standard Cylinder SE125X120S
The AirTAC SE125X120S is a double-acting single-rod ISO 15552 profile cylinder engineered for heavy-duty pneumatic tasks. It utilizes a square extruded aluminum barrel without external tie rods, yielding a compact, corrosion-resistant body that mounts flush in tight machinery spaces. Delivering a robust 6136 N push force at 0.5 MPa, this 125 mm bore unit integrates a built-in magnet for non-contact position detection.
Field-adjustable pneumatic cushioning at both ends allows technicians to tune end-of-stroke deceleration via a set screw, softening hard impacts even at high kinetic energies. The -S magnet directly supports AirTAC CMSE reed and DMSE electronic sensors, which drop into the sensor grooves machined on three sides of the body. Operating at speeds of 30-500 mm/s, it is built to survive demanding industrial cycles.
Airtac SE125 Standard Cylinder SE125X120S Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X120S |
|---|---|
| Series | SE ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 120 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 SE125X120S
| SE | ISO 15552 / VDMA 24562 profile-barrel double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×120 | 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 SE125X120S Is Used
Injection Mold Ejection
Supplies the 6136 N push force required to eject heavy automotive plastic panels from large injection molds, using the 120 mm stroke to clear the mold cavity safely.
Pallet Stopper Arms
Drives heavy-duty stopper arms on high-throughput pallet conveyors, where the 125 mm bore generates enough thrust to halt fully loaded pallets without bouncing.
Hydraulic Press Loading
Pushes heavy steel billets or plates into the bed of a forming press, utilizing the no-tie-rod profile to sit flush against the machine's primary frame.
Is the Airtac SE125 Standard Cylinder SE125X120S the Right Cylinder?
Choosing this 125 mm bore cylinder means you require substantial thrust, specifically 6136 N of push at 0.5 MPa. If your application needs slightly less force, the next bore down is 100 mm, providing 3927 N of push; conversely, 125 mm is the largest standard SE bore, so stepping up beyond this requires custom multi-cylinder mechanics. The 120 mm stroke is well within the 1500 mm maximum standard stroke, keeping it a readily available dimension.
When replacing an existing ISO 15552 cylinder, match the 125 mm bore, 120 mm stroke, PT1/2 port, and your required mounting accessory. Because this is a double-acting cylinder, it will drift and drop its load if air pressure is lost or a valve is centered; if your application demands fail-safe position holding, consider the AirTAC BSE rod-lock variant instead.
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 SE125X120S FAQ
At 0.5 MPa, the push force is 6136 N and the pull force is 5734 N. 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 SE125X120S is dimensionally interchangeable per ISO 15552 standards. You can drop it in as a replacement for other ISO 15552 profile cylinders by matching the 125 mm bore, 120 mm stroke, PT1/2 port, and mounting interface. The built-in -S magnet also works directly with AirTAC CMSE and DMSE sensors.
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