Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 145mm 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
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-100S
The AirTAC SAIJ125X145-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a carbon steel rod and a PT tapered port. Because of the 100mm adjustment code, this 145mm nominal stroke can be dialed back to a 45mm usable travel window, providing massive flexibility for product changeovers without swapping the cylinder.
The rear screw acts purely as a travel stop for end-position tuning, not as a lock, meaning it cannot hold a load without live air. For position sensing, the integrated magnet (-S) works seamlessly with AirTAC CMSE reed and DMSE electronic solid-state sensors housed in the dual-side extruded aluminum barrel grooves. It supports a standard speed range of 30-500 mm/s and includes variable air cushions at both ends to manage deceleration.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 145 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 SAIJ125X145-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×145 | 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 SAIJ125X145-100S Is Used
Product Size Changeovers
Dial in the 45-145mm travel window on the fly to accommodate varying package sizes on a packaging line without physically replacing the actuator.
Machine Setup Calibration
Fine-tune the exact end-position during initial commissioning using the rear stopper, ensuring precise mechanical alignment before locking down the controls.
Variable End-Stop Forming
Adjust the retract distance dynamically for metal forming or pressing applications where the material thickness dictates the required stroke depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-100S the Right Cylinder?
Choose this 125mm bore when an application requires substantial thrust, such as 6136N push at 0.5 MPa, but demands variable end-stops during commissioning. If your setup only needs 3927N of push force at 0.5 MPa, stepping down to a 100mm bore saves space, whereas moving up to a 160mm bore yields 10053N for heavier loads. Remember that the rear adjuster only sets the travel end; for true load-holding without live pressure, consider an external rod lock or the AirTAC SAIL lock cylinder.
To match this ISO 15552 interchangeable cylinder, confirm your bore is 125mm, nominal stroke is 145mm, adjustment range is 100mm, port thread is PT, and the magnet option is -S. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR options. Since this unit features a 145mm stroke, the robust 32mm rod handles side loads well, though any long unsupported stroke still requires an external guide.
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 SAIJ125X145-100S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At its maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear external screw acts as a mechanical stop, allowing you to trim the 145mm nominal stroke back by up to 100mm. This creates a usable travel window of 45-145mm, which is set at commissioning and acts only as a stop, not a load lock.
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