Airtac SE125 Standard Cylinder SE125X305SN
The AirTAC Airtac SE125 Standard Cylinder SE125X305SN is a genuine double-acting ISO 15552 / VDMA 24562 profile-barrel air cylinder with a Ø125mm bore and 305mm 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
- Stroke305 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SE125 Standard Cylinder SE125X305SN
The AirTAC SE125X305SN is a double-acting single-rod ISO 15552 profile cylinder engineered for heavy-duty pneumatics, delivering a robust 6136 N push force at 0.5 MPa. Its square extruded aluminum barrel eliminates external tie rods, yielding a compact, corrosion-resistant body that mounts flush against machine frames while maintaining the standardized ISO 15552 footprint for seamless retrofitting.
This 125 mm bore unit is equipped with a built-in magnet (-S) for non-contact position sensing using AirTAC CMSE reed or DMSE electronic switches, and uses an NBR seal suited for standard ambient temperatures. Field-adjustable air cushioning at both ends allows technicians to dial in end-of-stroke deceleration via a set screw, softening hard impacts during high-mass cycling.
Airtac SE125 Standard Cylinder SE125X305SN Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X305SN |
|---|---|
| Series | SE ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 305 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 SE125X305SN
| SE | ISO 15552 / VDMA 24562 profile-barrel double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×305 | 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 SE125X305SN Is Used
Metal Stamping Press
Provides the 6136 N push force required to actuate heavy mechanical stamping dies and hold sheet metal blanks securely during forming operations.
Injection Molding Extraction
Handles the high extraction forces needed to pull dense, deeply molded plastic automotive components out of injection molds on 305 mm of travel.
Heavy Machinery Clamping
Locks down massive steel fabrications or large cast components onto machining centers, utilizing the 1252 kgf maximum thrust to prevent any workpiece shifting.
Is the Airtac SE125 Standard Cylinder SE125X305SN the Right Cylinder?
Generating 6136 N of thrust at 0.5 MPa, this 125 mm bore cylinder is the largest in the SE lineup, making it the definitive choice when the next size down (100 mm, offering 3927 N push) cannot move your load. Because it is the maximum bore, there is no larger standard SE option available. Remember that a plain SE cylinder will drift and cannot hold a load if air pressure is lost; for dead-end holding, consider a BSE rod lock variant. To match this unit for an ISO 15552 drop-in replacement, specify the 305 mm stroke, PT1/2 port, and your required mounting accessory. With a 305 mm stroke, the 32 mm rod and bearing are subject to bending moments under heavy lateral loads, so an external guide is highly recommended to prevent premature wear.
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 SE125X305SN 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 is 8590 N. The maximum push force is 1252 kgf at 1.0 MPa. The operational speed range for this 125 mm bore cylinder is 30-500 mm/s.
Yes. The SE125X305SN is dimensionally interchangeable per the ISO 15552 / VDMA 24562 standard, meaning it shares the exact mounting footprint and PT1/2 port locations of other ISO 15552 profile cylinders. The built-in S magnet also allows you to mount AirTAC CMSE reed or DMSE electronic sensors directly into the barrel grooves.
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