Airtac SE125 Standard Cylinder SE125X85
The AirTAC Airtac SE125 Standard Cylinder SE125X85 is a genuine double-acting ISO 15552 / VDMA 24562 profile-barrel air cylinder with a Ø125mm bore and 85mm 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
- Stroke85 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SE125 Standard Cylinder SE125X85
The AirTAC SE125X85 is a double-acting, single-rod ISO 15552 profile cylinder engineered for heavy-duty pneumatics, delivering a substantial 6136 N push force at 0.5 MPa. Its square extruded aluminum barrel eliminates external tie rods entirely, yielding a completely flush exterior that resists corrosion and simplifies direct mounting against machine frames. This robust 125 mm bore design uses a PT1/2 port and a 32 mm piston rod to handle high load cycles.
Unlike fixed rubber bumpers, this model features a field-adjustable pneumatic cushion at both ends, allowing technicians to dial in end-of-stroke deceleration via a screw to soften hard impacts at high speeds. Note that this specific SKU is built without a position-sensing magnet, so it operates as a blind actuator without CMSE or DMSE electronic switch integration.
Airtac SE125 Standard Cylinder SE125X85 Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X85 |
|---|---|
| Series | SE ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 85 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 SE125X85
| SE | ISO 15552 / VDMA 24562 profile-barrel double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×85 | 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 SE125X85 Is Used
Hydraulic Press Tonnage
Drives the primary ram on a 100-ton hydraulic press unloading station, utilizing the 6136 N push force to eject heavy forged steel blanks.
Metal Stamping Hold-Down
Provides the massive clamping pressure required to secure thick gauge sheet metal during a progressive die stamping operation.
Injection Molding Ejector
Actuates the heavy rear ejection pins on a large plastic injection molding machine, relying on the 32 mm rod to withstand substantial stripping forces.
Is the Airtac SE125 Standard Cylinder SE125X85 the Right Cylinder?
Selecting the SE125X85 makes sense when your application demands up to 1252 kgf of maximum thrust at 1.0 MPa. If you need slightly less force, stepping down to the 100 mm bore drops the 0.5 MPa push output to 3927 N, whereas moving up is not an option as 125 mm is the largest standard SE size. Because this is a non-locking actuator, the piston will drift and drop the load instantly if air pressure is lost or the directional valve is centered; for critical hold-down requirements, consider pairing it with an external pilot-operated check valve or a BSE rod-lock variant. Since the stroke is 85 mm, side-load bending stresses on the rod bearing are minimal compared to longer travels.
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 SE125X85 FAQ
At 0.5 MPa, the SE125X85 delivers 6136 N of push force and 5734 N of pull force. When operating at 0.7 MPa, the push force increases to 8590 N. The maximum rated push force is 1252 kgf when supplied at the maximum operating pressure of 1.0 MPa.
Yes, the SE125X85 is dimensionally interchangeable per ISO 15552 standards, meaning it shares identical mounting footprint, port sizes, and pin distances for a drop-in retrofit. The extruded profile barrel also allows standard AirTAC mounting accessories to bolt directly to the body without interfering with external tie rods.
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