Airtac SE125 Standard Cylinder SE125BX900SN
The AirTAC Airtac SE125 Standard Cylinder SE125BX900SN is a genuine double-acting ISO 15552 / VDMA 24562 profile-barrel air cylinder with a Ø125mm bore and 900mm 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
- Stroke900 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SE125 Standard Cylinder SE125BX900SN
The AirTAC SE125BX900SN is a double-acting single-rod ISO 15552 profile cylinder engineered for heavy-duty actuation. It delivers a robust 6136 N push force at 0.5 MPa and utilizes a 125 mm bore. The extruded aluminum barrel lacks external tie rods, presenting a smooth, corrosion-resistant profile that mounts flush against machine frames while keeping debris accumulation to a minimum.
This 900 mm stroke variant features a SUS304 stainless steel rod (code B) paired with an NBR seal, making it highly suited for corrosive or washdown environments. The integrated magnet (-S) enables precise end-of-stroke detection using AirTAC CMSE reed or DMSE electronic sensors. Field-adjustable pneumatic cushioning at both ends allows technicians to tune end-stop deceleration for heavy 125 mm payloads traveling at up to 500 mm/s.
Airtac SE125 Standard Cylinder SE125BX900SN Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125BX900SN |
|---|---|
| Series | SE ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 900 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 SE125BX900SN
| SE | ISO 15552 / VDMA 24562 profile-barrel double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×900 | 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 SE125BX900SN Is Used
Metal Stamping Press
Provides 6136 N of extend force at 0.5 MPa to actuate heavy stamping dies, utilizing the 900 mm stroke to clear large workpiece areas.
Washdown Conveyor Diverter
Leverages the SUS304 stainless steel rod and NBR seal to withstand chemical washdowns while diverting heavy bulk material bins on a 900 mm track.
Automotive Body Assembly
Uses the 125 mm bore capacity to lift and position heavy vehicle chassis frames, relying on DMSE electronic sensors for precise end-of-stroke confirmation.
Is the Airtac SE125 Standard Cylinder SE125BX900SN the Right Cylinder?
When sizing this 125 mm bore model, consider stepping down to the 80 mm bore if your load requires less force, as it provides 2513 N push at 0.5 MPa. Since 125 mm is the largest standard SE bore, you cannot step up further within the series. The 900 mm stroke is a standard length for this bore, but long unsupported strokes increase the risk of rod-bearing bending under side loads; an external guide is recommended to prevent premature seal wear. Remember that a plain SE cylinder does not hold its load when air is exhausted or a valve is centered—the piston will drift. For position holding without live pressure, specify a BSE rod lock variant. As a true ISO 15552 cylinder, it is dimensionally interchangeable with other ISO 15552 cylinders, simplifying retrofits using the existing PT1/2 port and standard mounting hardware.
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 SE125BX900SN FAQ
This 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N at 0.5 MPa. At 0.7 MPa, the push force is 8590 N. The maximum push force is 1252 kgf at 1.0 MPa operating pressure.
It is dimensionally interchangeable per ISO 15552 standards, allowing it to drop-in replace other ISO 15552 profile cylinders using the same mounting interface. However, it does not hold its load when air is lost; the adjustable air cushion only decelerates the piston near the stroke end. For position holding, use a BSE rod lock.
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