Airtac SE125 Standard Cylinder SE125BX350SN
The AirTAC Airtac SE125 Standard Cylinder SE125BX350SN is a genuine double-acting ISO 15552 / VDMA 24562 profile-barrel air cylinder with a Ø125mm bore and 350mm 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
- Stroke350 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SE125 Standard Cylinder SE125BX350SN
The AirTAC SE125BX350SN is a double-acting ISO 15552 profile cylinder engineered for heavy-duty pneumatic actuation. It delivers a substantial 6136 N push force at 0.5 MPa alongside a 5734 N pull force, utilizing a 125 mm bore and 350 mm stroke. The SUS304 stainless steel rod and NBR seal make it highly suitable for environments requiring corrosion resistance and reliable sealing under demanding conditions.
Designed with a square extruded aluminum barrel, this model eliminates external tie rods for a compact, flush-mount profile that resists corrosion and simplifies sensor placement. The integrated magnet supports AirTAC CMSE reed and DMSE electronic sensors for precise end-position detection. Furthermore, the field-adjustable air cushions at both ends allow technicians to tune the end-of-stroke deceleration, smoothly dampening the heavy 1252 kgf maximum load without harsh impacts.
Airtac SE125 Standard Cylinder SE125BX350SN Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125BX350SN |
|---|---|
| Series | SE ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 350 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 SE125BX350SN
| SE | ISO 15552 / VDMA 24562 profile-barrel double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×350 | 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 SE125BX350SN Is Used
Heavy Stamping Press Ejection
Provides the 8590 N push force at 0.7 MPa required to eject thick steel blanks from a stamping die, utilizing the SUS304 rod to withstand coolant washdown.
Pallet Accumulation Gate
Actuates a heavy-duty divert gate on a 1000 kg capacity roller conveyor, using the 350 mm stroke to fully clear the pallet path while handling high kinetic loads.
Bulk Container Lid Press
Secures and seals heavy lids on industrial bulk containers, relying on the 5734 N retract force to lift the tooling and the NBR seal to resist industrial lubricants.
Is the Airtac SE125 Standard Cylinder SE125BX350SN the Right Cylinder?
Selecting the SE125BX350SN is ideal when your application demands maximum thrust, but sizing correctly is critical. If you need to step down to reduce cycle time or air consumption, the neighboring 100 mm bore provides a 3927 N push at 0.5 MPa. As the largest standard bore in the SE range, there is no larger option; for forces exceeding 6136 N at 0.5 MPa, you must deploy two cylinders in parallel. Because this unit features a 350 mm stroke, the extended rod is subject to bending under side loads; an external guide mechanism is strongly recommended to prevent premature rod-bearing wear.
This cylinder is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other ISO 15552 cylinders with a 125 mm bore and 350 mm stroke. It utilizes a PT1/2 port and includes the -S magnet for position sensing. Note that while the adjustable air cushion decelerates the piston near stroke end, it does not function as a lock; if your process must hold a load safely without live air pressure, you must integrate an external rod lock or pilot-operated check valve.
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 SE125BX350SN 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 operating speed range for this 125 mm bore cylinder is 30-500 mm/s.
Yes, the SE125BX350SN is dimensionally interchangeable per ISO 15552. You can use it as a drop-in replacement for other ISO 15552 cylinders with a 125 mm bore and 350 mm stroke, utilizing the standard mounting interface and PT1/2 ports.
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