Airtac SE125 Standard Cylinder SE125X312S
The AirTAC Airtac SE125 Standard Cylinder SE125X312S is a genuine double-acting ISO 15552 / VDMA 24562 profile-barrel air cylinder with a Ø125mm bore and 312mm 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
- Stroke312 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SE125 Standard Cylinder SE125X312S
The AirTAC SE125X312S is a double-acting, single-rod ISO 15552 profile cylinder engineered for heavy-duty pneumatic tasks. It delivers a substantial 6136 N push force at 0.5 MPa, utilizing a 125 mm bore and a 312 mm stroke. The robust Ø32 mm piston rod features an M27x2 thread, designed to handle high dynamic stresses.
Built with an extruded aluminum barrel that omits external tie rods, this cylinder offers a flush, corrosion-resistant exterior that simplifies mounting. The integrated -S magnet allows seamless positioning feedback using AirTAC CMSE reed or DMSE electronic sensors. Furthermore, the field-adjustable pneumatic cushions at both ends can be precisely tuned to decelerate the massive 1252 kgf maximum load, preventing harsh end-of-stroke impacts.
Airtac SE125 Standard Cylinder SE125X312S Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X312S |
|---|---|
| Series | SE ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 312 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 SE125X312S
| SE | ISO 15552 / VDMA 24562 profile-barrel double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×312 | 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 SE125X312S Is Used
Injection Mold Clamping
Provides 6136 N of clamping force at 0.5 MPa to secure heavy injection mold halves within large pneumatic press fixtures.
Heavy-Duty Press Straightening
Utilizes the 312 mm stroke and 8590 N thrust at 0.7 MPa to straighten thick steel plates and structural brackets in metal fabrication.
Palletizer Lift Arm
Drives the vertical lift mechanism in automated palletizing systems, where the built-in magnet enables precise height positioning via DMSE sensors.
Is the Airtac SE125 Standard Cylinder SE125X312S the Right Cylinder?
Generating 6136 N of thrust at 0.5 MPa, this 125 mm bore cylinder represents the largest standard size in the SE series. If your machinery requires less force, stepping down to the 100 mm bore provides 3927 N of push, which may optimize air consumption. Because 312 mm exceeds standard incremental strokes, this unit is produced as a non-standard made-to-order length.
As a true ISO 15552 profile cylinder, it serves as a drop-in dimensional replacement for other ISO 15552 units, sharing standard PT1/2 ports and mounting hardware. Note that the 312 mm stroke creates extended leverage; for applications lacking an external guide, the unsupported rod-bearing bending moment increases, requiring external guide rails to prevent side-load damage. Additionally, the adjustable air cushion only decelerates the piston near stroke end—it does not hold the load if air pressure is lost. For position holding, consider a BSE rod lock 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 SE125X312S FAQ
At 0.5 MPa, it provides 6136 N push and 5734 N pull. At 0.7 MPa, push increases to 8590 N. The maximum push force is 1252 kgf at 1.0 MPa. The operational speed range is 30-500 mm/s.
Yes, the SE125X312S is dimensionally interchangeable per ISO 15552 standards. It shares the standardized mounting interface and PT1/2 port sizing, allowing it to drop-in replace other ISO 15552 profile cylinders without altering your existing machinery footprint.
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