Airtac SE125 Standard Cylinder SE125X550
The AirTAC Airtac SE125 Standard Cylinder SE125X550 is a genuine double-acting ISO 15552 / VDMA 24562 profile-barrel air cylinder with a Ø125mm bore and 550mm 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
- Stroke550 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SE125 Standard Cylinder SE125X550
The AirTAC SE125X550 is a double-acting single-rod profile cylinder built to the ISO 15552 standard, delivering a robust 6136 N push force at 0.5 MPa. Its extruded aluminum barrel omits external tie rods, yielding a compact, flush-mounting body that resists corrosion and simplifies bracket installation. The square profile integrates sensor grooves on three sides, though this specific SKU lacks the built-in position-sensing magnet.
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 up to 500 mm/s. With a 550 mm stroke and a 32 mm hard-chrome rod, this unit is engineered for high-thrust linear actuation in demanding industrial environments.
Airtac SE125 Standard Cylinder SE125X550 Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X550 |
|---|---|
| Series | SE ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 550 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 SE125X550
| SE | ISO 15552 / VDMA 24562 profile-barrel double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×550 | 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 SE125X550 Is Used
Hydraulic Press Tonnage
Drives the main ram of a 50-ton hydraulic press jig, utilizing the 6136 N push force to seat heavy bearing assemblies into steel housings.
Injection Mold Ejection
Actuates a large-format injection mold ejection plate over a 550 mm stroke, smoothly retracting finished plastic automotive bumpers from the tool cavity.
Palletizer Push-Off
Executes the horizontal push-off stroke on a heavy-duty palletizer, transferring 1200 kg cement bags from the cooling conveyor onto wooden shipping pallets.
Is the Airtac SE125 Standard Cylinder SE125X550 the Right Cylinder?
Selecting the SE125X550 is appropriate when your application requires substantial thrust between the 80 mm bore (2513 N push at 0.5 MPa) and this 125 mm bore (6136 N push at 0.5 MPa). As the largest standard ISO 15552 bore in the AirTAC range, it serves as the upper limit for high-force tasks. If full force is unnecessary, stepping down to the 80 mm bore saves space and air consumption. Because the 550 mm stroke is non-standard and exceeds common lengths, expect a made-to-order lead time.
This plain SE cylinder does not hold its position or load when air pressure is lost, exhausted, or the valve is centered; the piston will drift. If your application requires static load holding without live pressure, consider the BSE variant with a rod lock or an external pilot-operated check valve. Furthermore, a 550 mm stroke generates significant rod-bearing bending moments under side loads; always support the load with an external guide to prevent premature seal wear. Dimensionally interchangeable per ISO 15552, it drops in for other ISO 15552 cylinders using standard mounting hardware.
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 SE125X550 FAQ
At 0.5 MPa, the SE125X550 delivers 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 operating speed range for this 125 mm bore cylinder is 30-500 mm/s.
This specific SE125X550 SKU does not include a built-in magnet, so it cannot host CMSE or DMSE position sensors without modification. Additionally, the adjustable air cushion only decelerates the piston near stroke end and does not function as a brake; the cylinder will drift if air pressure is lost. For load-holding requirements, use the BSE rod lock variant.
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