Airtac SE125 Standard Cylinder SE125X420S
The AirTAC Airtac SE125 Standard Cylinder SE125X420S is a genuine double-acting ISO 15552 / VDMA 24562 profile-barrel air cylinder with a Ø125mm bore and 420mm 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
- Stroke420 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SE125 Standard Cylinder SE125X420S
The AirTAC SE125X420S is a double-acting single-rod ISO 15552 profile cylinder engineered for heavy-duty linear motion. Utilizing a 125 mm bore and a 420 mm stroke, it generates a substantial 6136 N push at 0.5 MPa. The square extruded aluminum barrel omits external tie rods, yielding a compact, corrosion-resistant body that mounts flush against machine frames while maintaining the standardized ISO 15552 footprint.
Equipped with a built-in magnet (-S), this unit supports AirTAC CMSE reed and DMSE electronic position sensors along the three integrated sensor grooves. Field-adjustable pneumatic cushioning at both ends allows technicians to tune the 40 mm cushion length via a set screw, softening hard end stops when moving heavy payloads at speeds up to 30-500 mm/s.
Airtac SE125 Standard Cylinder SE125X420S Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X420S |
|---|---|
| Series | SE ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 420 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 SE125X420S
| SE | ISO 15552 / VDMA 24562 profile-barrel double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×420 | 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 SE125X420S Is Used
Injection Mold Platen Ejector
Drives heavy mold ejector pins with 6136 N of push force at 0.5 MPa, utilizing the 420 mm stroke to fully clear large automotive components from the tooling cavity.
Stamping Press Transfer Arm
Actuates a robust transfer arm that shifts heavy steel blanks between die stations, relying on the adjustable 40 mm cushion to decelerate the 125 mm piston smoothly at stroke end.
Hydraulic Press Brake Gauging
Positions heavy back-gauge stops on a large press brake, using the built-in magnet and DMSE electronic sensors to confirm precise 420 mm retraction coordinates.
Is the Airtac SE125 Standard Cylinder SE125X420S the Right Cylinder?
Selecting this 125 mm bore cylinder is appropriate when your application requires up to 6136 N of push force at 0.5 MPa. If you need less force, stepping down to the 100 mm bore yields 3927 N of push; as this is the largest standard SE bore, there is no larger step-up within the series. Because the 420 mm stroke is substantial, the unsupported piston rod is subject to bending under side loads—always incorporate an external guide to prevent rod-bearing damage.
This model is dimensionally interchangeable with other ISO 15552 cylinders, ensuring a drop-in retrofit using existing mounting hardware. Remember that a standard double-acting cylinder drifts when air pressure is lost; if the machine must hold a 1252 kgf load safely during an exhaust or emergency stop, integrate an external rod lock or specify a BSE variant.
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 SE125X420S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push and 5734 N of pull. At 0.7 MPa, the push force is 8590 N, with a maximum push capacity of 1252 kgf at 1.0 MPa. The operational speed range is 30-500 mm/s.
Yes, the SE125X420S is dimensionally interchangeable per ISO 15552. You can drop it in as a replacement for other ISO 15552 profile cylinders using your existing PT1/2 port connections and mounting accessories without altering the machine footprint.
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