Airtac SAI125 Standard Air Cylinder SAI125X800S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X800S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 800mm 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
- Stroke800 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X800S
The AirTAC SAI125X800-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a substantial push force of 6136 N at 0.5 MPa, this 125 mm bore unit is built to drive high-inertia loads reliably. The 800 mm stroke provides the extended travel needed for large-scale material handling. It features a standard carbon steel piston rod for robust durability in demanding industrial environments.
Because this variant includes the -S magnet option, it integrates seamlessly with CMSE and DMSE sensor switches. These ride directly in the dual-sided extruded aluminum barrel groove, giving your control system precise end-of-stroke positioning feedback without requiring external bracketry.
Airtac SAI125 Standard Air Cylinder SAI125X800S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X800S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 800 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 SAI125X800S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×800 | 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 SAI125X800S Is Used
Large Package Diverting
Drives heavy diverter arms on wide-belt logistics conveyors, utilizing the 800 mm stroke to shift high-mass pallets across multiple sorting lanes.
Automotive Press Feeding
Loads large sheet metal blanks into heavy stamping presses, where the 6136 N push force at 0.5 MPa easily overcomes material hanging friction.
Automated Storage Retrieval
Actuates telescopic pusher mechanisms in automated storage and retrieval systems (AS/RS), moving heavy totes with precise CMSE sensor feedback.
Is the Airtac SAI125 Standard Air Cylinder SAI125X800S the Right Cylinder?
When sizing this actuator, verify if the 125 mm bore is strictly necessary. Stepping down to a 100 mm bore drops the 0.5 MPa push force to 3927 N, which might suffice for lighter loads and save space. Conversely, moving up to a 160 mm bore increases the 0.5 MPa output to 10053 N for extreme inertia. This 800 mm stroke demands careful mechanical planning; long unsupported rods are highly susceptible to bending under side load. You must use an external guide rail or a fully guided cylinder to prevent rod-bearing destruction and premature seal failure.
This model uses a PT tapered G1/2 port and supports standard ISO 15552 mounting accessories like TC trunnion or FA flange kits. Be aware that the standard double-acting design relies on live air pressure to hold position; if air is exhausted or the valve centers, the load will drift. For fail-safe load holding without continuous pressure, specify the SAIL (air-released lock) or BSAI (clamp-lock) variant instead of relying on the adjustable air cushions, which only decelerate the piston near stroke end.
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 SAI125X800S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 8590 N.
Yes. The SAI125X800-S is a true ISO 15552 profile cylinder, making its mounting interface and envelope dimensions fully interchangeable with other ISO 15552 cylinders from brands like Festo or SMC. You can drop it directly into existing ISO 15552 tooling.
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