Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-10 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 SAIJ125X900-10
The AirTAC SAIJ125X900-10 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 6136N push force and 5734N pull force at 0.5 MPa, making it suited for heavy-duty actuation. The integrated rear stopper allows you to trim the effective travel, creating an 890-900mm usable stroke window for precise end-position calibration.
This 125mm bore unit uses a G1/2 port and a 32mm carbon steel rod with an M27x2 thread, providing high structural rigidity. The extruded aluminum barrel includes sensor grooves on both sides, and its variable air cushions at both ends decelerate the heavy 900mm travel. The rear adjuster acts strictly as a travel stop for commissioning flexibility, not as a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-10 |
|---|---|
| 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 SAIJ125X900-10
| 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 SAIJ125X900-10 Is Used
Product Changeover Lines
Dial back the stroke by up to 10mm to accommodate slightly shorter product lengths on a conveyor without physically swapping out the entire cylinder assembly.
Heavy Press Tuning
Fine-tune the retraction end-stop during machine commissioning to set precise pressing depths for heavy-duty 125mm bore forming operations.
Long-Stroke Material Handling
Actuate large loading arms over a 900mm distance, using the rear adjuster to perfectly dial in the resting position without adding external mechanical stops.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-10 the Right Cylinder?
Choose this adjustable-stroke model when a fixed-stroke SAI cylinder cannot accommodate product changeovers or minor mechanical drift without adding external stops. If your application requires less thrust, stepping down to a 100mm bore yields 3927N push force at 0.5 MPa. For load-holding without live air pressure, this cylinder is insufficient; you must specify an SAIL pneumatic lock or a BSAI clamp-lock cylinder instead.
Because the 900mm stroke exceeds 300mm, the 32mm rod and M27x2 thread still need external guidance to prevent excessive side-loading and rod deflection. To achieve exact ISO 15552 interchangeability, match the 125mm bore, 900mm stroke, 10mm adjustment, PT tapered port threads, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting interfaces.
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 SAIJ125X900-10 FAQ
The rear adjusting screw acts as an external stopper, allowing you to shorten the nominal 900mm stroke by up to 10mm. This creates an adjustable 890-900mm travel window for fine-tuning the end position at commissioning without replacing the cylinder.
At a 0.5 MPa operating pressure, this 125mm bore double-acting cylinder provides 6136N of push force and 5734N of pull force. It can reach up to 1251 kgf at its maximum 1.0 MPa pressure rating.
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