Airtac SE125 Standard Cylinder SE125X300SN
The AirTAC Airtac SE125 Standard Cylinder SE125X300SN is a genuine double-acting ISO 15552 / VDMA 24562 profile-barrel air cylinder with a Ø125mm bore and 300mm 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
- Stroke300 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SE125 Standard Cylinder SE125X300SN
The AirTAC SE125X300SN is a double-acting, single-rod ISO 15552 profile cylinder engineered for heavy-duty pneumatic tasks. It generates a substantial 6136 N of push force at 0.5 MPa and features a robust Ø32 mm piston rod with an M27x2 thread. The extruded aluminum barrel omits external tie rods, yielding a highly compact, corrosion-resistant body that mounts flush against machine frames while protecting internal mechanics.
This 125 mm bore unit incorporates an NBR seal for reliable operation in standard temperature environments and includes a built-in magnet for CMSE and DMSE position sensing. Field-adjustable pneumatic cushioning at both ends allows technicians to tune end-of-stroke deceleration, softening hard impacts when moving massive loads at speeds up to 500 mm/s.
Airtac SE125 Standard Cylinder SE125X300SN Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X300SN |
|---|---|
| Series | SE ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 300 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 SE125X300SN
| SE | ISO 15552 / VDMA 24562 profile-barrel double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×300 | 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 SE125X300SN Is Used
Automotive Stamping Press Ejection
Provides the 6136 N push force required to eject heavy stamped metal panels from automotive press dies, utilizing the 300 mm stroke to fully clear the mold area before the next cycle.
Heavy Machinery Clamping Fixtures
Secures large steel machinery frames during machining operations, leveraging the robust M27x2 rod thread and NBR seals to maintain rigid, high-force clamping in demanding industrial environments.
Hydraulic Panel Bending Press
Drives the primary bending arm in a thick-steel panel forming press, where the 125 mm bore and 8590 N push at 0.7 MPa deliver the necessary power to bend heavy-gauge materials precisely.
Is the Airtac SE125 Standard Cylinder SE125X300SN the Right Cylinder?
Selecting this 125 mm bore cylinder makes sense when your application requires the maximum standard push force of 6136 N at 0.5 MPa. If your load demands less exertion, stepping down to the 100 mm bore reduces the push output to 3927 N, saving valuable space and air consumption. Since this is the largest standard SE bore, no larger neighbor exists in this series. As a dimensionally interchangeable ISO 15552 component, it serves as a direct drop-in replacement for other ISO 15552 profile cylinders, utilizing identical mounting hardware like TC center trunnions or CA clevis brackets.
Because this model features a 300 mm stroke, the extended rod is subject to bending moments under heavy side loads. Implementing an external guide mechanism alongside the cylinder is strongly recommended to prevent premature rod-bearing wear. Note that the adjustable air cushion only decelerates the piston near stroke end; it does not hold a load. If air pressure drops, the piston will drift, requiring a BSE rod lock for secure position holding.
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 SE125X300SN FAQ
At 0.5 MPa, this 125 mm bore cylinder delivers 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N, with an absolute maximum push capacity of 1252 kgf at 1.0 MPa. The operational speed range is 30-500 mm/s.
Yes, the SE125X300SN is dimensionally interchangeable per the ISO 15552 standard, meaning it matches the exact mounting interface and footprint of other ISO 15552 profile cylinders. It uses a PT1/2 port and features an integrated magnet compatible with AirTAC CMSE (reed) and DMSE (electronic) sensors.
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