Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 900mm 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
- Stroke900 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-10
The AirTAC SAIJ125X900-10 is a double-acting ISO 15552 profile cylinder engineered with a rear mechanical stroke adjuster. It provides a 890-900 mm usable travel window, enabling precise end-position tuning at commissioning without adding external stops. The 125 mm bore generates 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it suitable for heavy-duty actuation.
This unit features a SUS420J2 stainless steel rod for superior corrosion resistance and utilizes PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, supporting CMSE reed and DMSE electronic switches when a magnet is specified. Operating speed is rated for 30-500 mm/s, and the rear adjuster functions purely as a travel stop, not a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 900 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 SAIJ125AX900-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×900 | 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 SAIJ125AX900-10 Is Used
Machine Setup Calibration
Dial in the exact 890 to 900 mm end-stop position during initial machine commissioning to perfect heavy-duty pressing or pushing operations.
Product Changeover
Quickly trim the stroke by up to 10 mm to accommodate a new product size on the line without disassembling the cylinder setup.
Heavy-Duty Positioning
Leverage the 6136 N push force at 0.5 MPa to move substantial masses while retaining the flexibility of a variable end-stop.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-10 the Right Cylinder?
Select this 125 mm bore model when an application demands high thrust that a 100 mm bore cannot provide, as the step up increases push force at 0.5 MPa from 3927 N to 6136 N. The 10 mm adjustable stroke is ideal for product changeovers or fine-tuning a long 900 mm travel distance. For load-holding without live air pressure, this cylinder is insufficient; consider an AirTAC SAIL or BSAI lock variant instead. When replacing an ISO 15552 cylinder, verify the 900 mm stroke, 10 mm adjustment, PT port, and mounting interface.
Because the 900 mm stroke is substantial, the 32 mm rod diameter requires external guidance to prevent side-loading damage. The SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets.
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 SAIJ125AX900-10 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach up to 11045 N of push force at 0.9 MPa.
The rear adjusting screw acts as a mechanical stopper, allowing you to shorten the effective travel from the nominal 900 mm down to 890 mm. This provides a 10 mm tuning window for precise positioning without replacing the cylinder.
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