Airtac SE125 Standard Cylinder SE125X550S
The AirTAC Airtac SE125 Standard Cylinder SE125X550S 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 SE125X550S
The AirTAC SE125X550S is a double-acting single-rod ISO 15552 profile cylinder engineered for heavy-duty linear motion. Operating at 0.5 MPa, it generates 6136 N of push force and 5734 N of pull force, scaling up to a maximum output of 1252 kgf at 1.0 MPa. The extruded aluminum barrel design omits external tie rods, yielding a compact, flush-mounting body that resists corrosion and simplifies bracket installation across automated machinery.
This specific configuration includes a built-in position magnet (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic sensors along its three integrated sensing grooves. A field-adjustable pneumatic cushion at both stroke ends allows technicians to tune end-of-travel deceleration via a set screw, softening hard impacts for the 32 mm hard-chrome rod when cycling heavy loads.
Airtac SE125 Standard Cylinder SE125X550S Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X550S |
|---|---|
| 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 SE125X550S
| 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 SE125X550S Is Used
Heavy Press Forming
Provides 8590 N of thrust at 0.7 MPa to form and stamp thick-gauge sheet metal enclosures, utilizing the 550 mm stroke to clear tall dies during tooling changes.
Pallet Lift Gates
Raises and lowers heavy diverter gates on automated pallet conveyors, where the 1252 kgf max capacity easily offsets the dead weight of steel structures and accumulated loads.
Injection Mold Ejection
Drives large primary ejector plates in plastic injection molding machinery, relying on the -S magnet and DMSE sensors to confirm full 550 mm retraction before mold closure.
Is the Airtac SE125 Standard Cylinder SE125X550S the Right Cylinder?
Selecting the SE125X550S is appropriate when your application requires substantial thrust over a 550 mm distance. If 6136 N at 0.5 MPa exceeds your requirement, stepping down to the 100 mm bore drops the push force to 3927 N, saving air volume and physical footprint. Conversely, if you need to push beyond the 1252 kgf maximum capacity of this 125 mm bore, you must move to a larger non-ISO profile or a tie-rod cylinder format, as 125 mm is the largest standard SE dimension. Because this is a 550 mm stroke, the 32 mm rod and internal bearing face bending stresses under high side-loading; an external guide rail should be fitted to prevent premature seal wear.
As a true ISO 15552 cylinder, this model provides a dimensionally interchangeable mounting footprint for drop-in replacement of other ISO 15552 profile cylinders. It uses a PT1/2 port and M27x2 rod thread. Note that the adjustable air cushion only decelerates the piston near stroke end; it does not lock or hold the load. If the system loses air pressure, the cylinder will drift, requiring a BSE rod lock variant or external pilot-operated check valve for secure positioning.
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 SE125X550S 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 for this 125 mm bore cylinder is 30-500 mm/s.
Yes, the SE125X550S features a standard ISO 15552 / VDMA 24562 profile body, making it dimensionally interchangeable with other ISO 15552 profile cylinders. You can reuse existing mounting hardware, though you should verify the PT1/2 port and M27x2 rod thread compatibility during installation.
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