Airtac SAI125 Standard Air Cylinder SAI125X35S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X35S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 35mm stroke, G1/2 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
- Stroke35 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X35S
The AirTAC SAI125X35-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty positioning tasks. Operating at 0.5 MPa, it generates 6136 N of push force and 5734 N of pull force, making it well-suited for high-impact pressing and robust clamping operations within a compact 35 mm stroke. Its extruded aluminum barrel omits tie-rods, presenting a clean, standardized exterior that drops directly into ISO 15552 mounting interfaces.
Because this specific unit includes the -S magnet option, it is fully primed for position sensing via CMSE or DMSE series switches. The integrated sensor grooves on both lateral sides of the profile barrel allow for flexible switch mounting. Additionally, operators can tailor the cylinder to harsh environments by selecting alternative seal materials, such as Viton (H) for elevated temperature resilience or NBR (N) for specific fluid compatibility.
Airtac SAI125 Standard Air Cylinder SAI125X35S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X35S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 35 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| 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 |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
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 SAI125 Standard Air Cylinder SAI125X35S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×35 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAI125 Standard Air Cylinder SAI125X35S Is Used
Heavy-Duty Stamping
Provides 6136 N of thrust at 0.5 MPa for short-stroke metal stamping, riveting, and piercing operations in automated fabrication cells.
Pallet Stopper
Acts as a high-force stopper arm on heavy-load conveyor lines, utilizing the 35 mm stroke to halt and brace large pallets securely.
Multi-Vise Clamping
Secures bulky cast or machined components inside multi-station vise fixtures, using the integrated magnet for end-of-stroke confirmation.
Is the Airtac SAI125 Standard Air Cylinder SAI125X35S the Right Cylinder?
With its 125 mm bore, this model sits comfortably below the 160 mm class (which provides 10053 N at 0.5 MPa) and well above the 100 mm class (3927 N at 0.5 MPa). Choose this 125 mm bore when your application demands roughly 6000 N of force but the 100 mm variant falls short. The 35 mm stroke is ideal for short-travel clamping or ejection, keeping the overall retracted length minimized. It features a PT tapered port thread (G1/2) and utilizes standard FA/FB flanges or TC trunnion mounts for ISO 15552 interchangeability.
If the machinery requires the load to remain mechanically locked in place during a sudden loss of air pressure, a standard double-acting cylinder will drift. In those scenarios, the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock is recommended over the standard SAI to prevent uncommanded piston movement.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for 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 (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAI125 Standard Air Cylinder SAI125X35S FAQ
At 0.5 MPa, the push force is 6136 N and the pull force is 5734 N. If pressure is increased to 0.7 MPa, the push force rises to 8590 N.
Yes, the SAI125X35-S is built to the ISO 15552 profile standard, making its mounting dimensions interchangeable with other ISO 15552 profile cylinders. It uses a G1/2 port and standard FA, LB, or TC mounting accessories.
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