Airtac SE125 Standard Cylinder SE125X85S
The AirTAC Airtac SE125 Standard Cylinder SE125X85S 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 SE125X85S
The AirTAC SE125X85S is a double-acting single-rod profile cylinder conforming to ISO 15552 standards, delivering a substantial 6136 N of push force at 0.5 MPa. Its extruded aluminum barrel eliminates external tie rods, yielding a flush, corrosion-resistant body that mounts cleanly onto automated machinery. The integrated -S magnet enables direct fitment of CMSE reed or DMSE electronic sensors along the triple-sided sensor grooves for precise end-position detection.
Field-adjustable pneumatic cushioning at both stroke ends allows technicians to tune the 40 mm cushion length via a set screw, softening high-impact deceleration inherent to moving large masses at up to 500 mm/s. While this cushioning absorbs end-of-stroke kinetic energy, it functions strictly as a deceleration device and does not lock or hold the load if air pressure is lost.
Airtac SE125 Standard Cylinder SE125X85S Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X85S |
|---|---|
| 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 SE125X85S
| 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 SE125X85S Is Used
Pallet Dispenser Pusher
Drives the horizontal ejection of heavy wooden pallets from a magazine stack, utilizing the 6136 N push force at 0.5 MPa to overcome pallet friction and weight.
Injection Mold Platen
Actuates a secondary mold platen ejection mechanism, where the 32 mm hard-chrome rod and 85 mm stroke provide the rigid extension needed to clear thick resin parts.
Hydraulic Press Ejector
Ejects formed steel plates from a hydraulic press bed, relying on the adjustable 40 mm cushion to decelerate the heavy tooling before the end cap to prevent structural impact.
Is the Airtac SE125 Standard Cylinder SE125X85S the Right Cylinder?
Selecting this 125 mm bore provides a maximum thrust of 1252 kgf at 1.0 MPa, making it the largest standard SE size for heavy-duty tasks. If your application requires less force, stepping down to the 100 mm bore yields 3927 N of push at 0.5 MPa, offering a lighter footprint. Because this is the largest standard bore, there is no larger SE option for higher force demands. The 85 mm stroke is a standard length, and the PT1/2 porting handles the necessary high air volume for rapid actuation. Since the stroke is under 300 mm, side-load bending stress on the 32 mm rod is minimized, though heavy radial loads still require an external guide. Note that this cylinder will drift if air is exhausted; use a BSE rod lock for position-holding safety.
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 SE125X85S FAQ
At 0.5 MPa, the SE125X85S delivers 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N. The maximum push force is 1252 kgf when operating at the maximum rated pressure of 1.0 MPa.
Yes, the SE125X85S is dimensionally interchangeable per ISO 15552 standards, meaning it shares the exact same mounting footprint and rod thread (M27x2) as other standard ISO 15552 profile cylinders. The built-in -S magnet also allows you to easily attach AirTAC CMSE or DMSE position sensors for drop-in automation retrofits.
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