Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 210mm 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
- Stroke210 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-10S
The AirTAC SAIJ125X210-10-S is a double-acting, single-rod ISO 15552 profile cylinder with a rear stroke adjuster. It delivers 6136N of push force and 5734N of pull force at 0.5 MPa. The integrated rear adjusting screw allows you to fine-tune the effective travel within a 200 to 210mm usable window, providing exact end-position tuning at commissioning without adding external stops. This 125mm bore actuator features a PT tapered port and a robust 32mm carbon steel rod.
Because the adjuster acts as a mechanical stop rather than a lock, it cannot hold a load without live air pressure. For position-holding tasks, consider the SAIL or BSAI series. This -S variant includes a magnet for use with AirTAC CMSE reed and DMSE electronic sensors, which mount directly into the dual-side sensor grooves on the extruded aluminum barrel. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 210 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 SAIJ125 Adjustable Cylinder SAIJ125X210-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×210 | 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 SAIJ125 Adjustable Cylinder SAIJ125X210-10S Is Used
Product Changeover Tuning
Dial in the exact 200 to 210mm end-stop during machine setup for different product sizes without physically swapping the actuator.
Heavy Assembly Pressing
Leverage the 6136N push force at 0.5 MPa for heavy-duty joining tasks, using the rear stop to prevent over-travel during the press cycle.
End-Position Calibration
Fine-tune the retract position at commissioning to align with existing tooling, eliminating the need for external mechanical stops.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-10S the Right Cylinder?
Choose this 125mm bore model when your application requires heavy thrust in the 6000N range at 0.5 MPa, but you need precise end-position flexibility. The 10mm rear adjustment window is ideal for product changeovers on a line, letting you dial in the exact 200 to 210mm stroke without swapping the cylinder. If your force requirements are lower, stepping down to a 100mm bore yields 3927N push force, while stepping up to a 160mm bore provides 10053N.
This cylinder is dimensionally interchangeable per ISO 15552. Configuration: 125mm bore, 210mm stroke, 10mm adjustment, PT port, carbon steel rod, and -S magnet. Since the stroke exceeds 300mm on longer variants, an external guide is recommended to prevent side-load wear, though this 210mm stroke is well within the 1500mm maximum standard stroke limit.
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 SAIJ125 Adjustable Cylinder SAIJ125X210-10S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster screw acts as a mechanical stop that lets you trim the effective stroke back by up to 10mm, creating a 200 to 210mm usable travel window. It only sets the travel end and does not lock or hold the load without live air pressure.
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