Airtac SE125 Standard Cylinder SE125X20S
The AirTAC Airtac SE125 Standard Cylinder SE125X20S is a genuine double-acting ISO 15552 / VDMA 24562 profile-barrel air cylinder with a Ø125mm bore and 20mm 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
- Stroke20 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SE125 Standard Cylinder SE125X20S
The AirTAC SE125X20S 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, peaking at a maximum 1252 kgf. The integrated -S magnet enables precise end-of-stroke detection using AirTAC CMSE reed or DMSE electronic sensors.
Its square extruded aluminum barrel omits external tie rods, yielding a compact, corrosion-resistant body that mounts flush against machine frames. Field-adjustable pneumatic cushioning at both ends allows technicians to tune end-cap deceleration, softening hard mechanical stops during rapid 30-500 mm/s cycles.
Airtac SE125 Standard Cylinder SE125X20S Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X20S |
|---|---|
| Series | SE ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 20 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 SE125X20S
| SE | ISO 15552 / VDMA 24562 profile-barrel double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×20 | 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 SE125X20S Is Used
Hydraulic Press Ejection
Supplies the 6136 N push force required to eject dense steel blanks from a hydraulic press bed, utilizing the short 20 mm stroke for rapid, high-impact ejection.
Injection Mold Clamping
Secures heavy injection molding halves with 1252 kgf maximum clamping force, relying on the -S magnet and DMSE electronic sensors to confirm mold closure.
Metal Stamping Blanking
Drives a short-stroke blanking die in an automated metal forming line, using its field-adjustable air cushions to absorb the shock of 8590 N impact at 0.7 MPa.
Is the Airtac SE125 Standard Cylinder SE125X20S the Right Cylinder?
Selecting this 125 mm bore is necessary when your application demands extreme thrust, such as pressing or heavy lifting. If you need slightly less force, stepping down to the 100 mm bore yields 3927 N push at 0.5 MPa; as the largest standard SE size, there is no larger bore up option. For direct ISO 15552 dimensional interchangeability, match the 125 mm bore, 20 mm stroke, PT1/2 port, and your required mounting accessory. Because this is a short 20 mm stroke, side-load bending on the 32 mm rod is minimal, though external guides remain best practice for offset loads. Remember that the adjustable cushion only decelerates the piston near stroke end; it cannot hold a load if air pressure drops.
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 SE125X20S FAQ
At 0.5 MPa, this 125 mm bore cylinder outputs 6136 N push and 5734 N pull. At 0.7 MPa, push increases to 8590 N. The maximum push force is 1252 kgf at 1.0 MPa, with an operating speed range of 30-500 mm/s.
Yes, its standardized ISO 15552 mounting dimensions allow drop-in replacement for other profile cylinders of the same bore. However, the adjustable air cushion only decelerates the piston at end-of-stroke; it does not function as a lock, so the cylinder cannot hold a load without continuous air pressure.
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