Airtac SE125 Standard Cylinder SE125X185
The AirTAC Airtac SE125 Standard Cylinder SE125X185 is a genuine double-acting ISO 15552 / VDMA 24562 profile-barrel air cylinder with a Ø125mm bore and 185mm 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
- Stroke185 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SE125 Standard Cylinder SE125X185
The AirTAC SE125X185 is a double-acting, single-rod ISO 15552 profile cylinder engineered for heavy-duty pneumatic tasks. Operating at 0.5 MPa, it generates 6136 N of push force and 5734 N of pull force, scaling up to a maximum push of 1252 kgf at 1.0 MPa. The extruded aluminum barrel design omits external tie rods, yielding a compact, corrosion-resistant body that mounts flush against machine frames while protecting internal mechanics.
This 125 mm bore unit features a robust Ø32 mm piston rod and an M27x2 rod-end thread, utilizing a PT1/2 port for high-volume air delivery. Because this specific SKU lacks the -S magnet code, it does not support direct position sensing without modification. Field-adjustable air cushioning at both ends allows technicians to dial in end-of-stroke deceleration via a set screw, softening hard impacts when moving massive loads at speeds up to 30-500 mm/s.
Airtac SE125 Standard Cylinder SE125X185 Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X185 |
|---|---|
| Series | SE ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 185 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 SE125X185
| SE | ISO 15552 / VDMA 24562 profile-barrel double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×185 | 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 SE125X185 Is Used
Injection Mold Platen Ejection
Provides the 6136 N push force at 0.5 MPa required to eject dense plastic parts from injection molding platens, utilizing the 185 mm stroke to clear the mold base completely.
Heavy Press Brake Actuation
Drives the upper tooling assembly in an industrial metal press brake, where the Ø32 mm rod and M27x2 thread endure high side loads during sheet metal bending operations.
Pallet Stopper Gate Mechanism
Acts as a heavy-duty pneumatic stopper gate on automated pallet conveyors, using its 1252 kgf maximum push capacity to halt fully loaded pallets without deflecting.
Is the Airtac SE125 Standard Cylinder SE125X185 the Right Cylinder?
Selecting the SE125X185 is appropriate when your application demands substantial thrust that smaller bores cannot achieve. If you need to step down to reduce cycle time or air consumption, the adjacent 100 mm bore offers 3927 N of push at 0.5 MPa. As the largest standard SE size, there is no larger bore to step up to within this series. When replacing an existing ISO 15552 cylinder, match the 125 mm bore, 185 mm stroke, PT1/2 port, and mounting accessory to ensure a seamless drop-in fit.
Keep in mind that a plain SE cylinder does not hold its position or load when air pressure is lost or the valve is centered; the piston will drift. If your setup requires static load holding without live pressure, you must integrate an external rod lock or transition to the AirTAC BSE variant. Additionally, the 185 mm stroke is below the 300 mm threshold, so standard rod-bearing bending is minimal, though the sheer weight of the Ø32 mm rod still necessitates robust front-end support.
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 SE125X185 FAQ
The SE125X185 delivers a push force of 6136 N and a pull force of 5734 N at 0.5 MPa. At 0.7 MPa, the push force increases to 8590 N, with an absolute maximum push of 1252 kgf at 1.0 MPa. The operating speed range for this 125 mm bore is 30-500 mm/s.
Yes, the SE125X185 is dimensionally interchangeable with other ISO 15552 profile cylinders, allowing you to reuse existing mounting hardware like FA or LB brackets. However, it is a standard double-acting cylinder, meaning it will drift and cannot hold a load if air pressure is lost; you would need the BSE rod-lock variant for fail-safe holding.
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