Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 120mm 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
- Stroke120 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-10S
The AirTAC SAIJ125X120-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136 N of push force and 5734 N of pull force at a 0.5 MPa operating pressure. The built-in 10 mm adjustment screw creates a usable travel window between 110 and 120 mm, allowing you to dial in the exact retract end-position during commissioning without swapping out the physical cylinder.
This 125 mm bore unit features a carbon steel piston rod and uses PT tapered port threads sized at G1/2. An integrated -S magnet enables position sensing across the dual-side aluminum barrel grooves using AirTAC CMSE reed or DMSE solid-state switches. The rear adjuster acts purely as a travel stop to set deceleration points, so it will not hold a load if air pressure drops.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 120 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 SAIJ125X120-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×120 | 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 SAIJ125X120-10S Is Used
Machine Setup & Changeover
Fine-tune the 110-120 mm travel window during product line changeovers to accommodate varying part sizes without physically replacing the cylinder.
Variable End-Stop Positioning
Dial in the exact retract position during initial commissioning using the 10 mm rear adjuster, ensuring perfect alignment of heavy 125 mm bore assemblies.
Heavy-Duty Forming Operations
Leverage the 6136 N push force at 0.5 MPa for pressing and forming tasks while retaining the ability to trim the stroke by up to 10 mm for different tooling heights.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-10S the Right Cylinder?
Select this 125 mm bore model when an application requires heavy thrust—such as 6136 N at 0.5 MPa—but also demands precise end-position tuning for product changeovers. If you need slightly less force, stepping down to an 80 mm bore yields 2513 N of push force. Choosing this adjustable-stroke SAIJ over a fixed-stroke SAI eliminates the need to bolt on external stops during machine setup. For load-holding without live air pressure, this cylinder is insufficient; consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock instead. The SAIJ125X120-10-S is dimensionally interchangeable per ISO 15552 mounting interfaces, features a 30-500 mm/s speed range, and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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 SAIJ125X120-10S FAQ
It features a rear adjusting screw that lets you shorten the effective stroke by up to 10 mm. This creates a usable travel window of 110 to 120 mm, allowing you to set the exact retract end-position during setup without adding external stops.
At a 0.5 MPa operating pressure, the SAIJ125X120-10-S generates 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa operating pressure, it can deliver up to 1251 kgf of thrust.
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