Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-100 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 SAIJ125AX145-100
The AirTAC SAIJ125X145-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 6136N of pull force at 0.5MPa and provides a usable travel window of 45-145mm, letting you dial back the nominal 145mm stroke by up to 100mm during commissioning. This wide adjustment range is perfect for prototyping or production lines that frequently handle varying product sizes.
Equipped with a SUS420J2 stainless steel rod (option A) and PT tapered port threads, this 125mm bore unit runs at 30-500mm/s. The rear adjuster acts purely as a mechanical stop to set the retract end position, meaning it cannot hold the load without live air pressure. For position holding, an external pilot-operated check valve or a related SAIL lock cylinder is required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-100 |
|---|---|
| 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 SAIJ125AX145-100
| 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 SAIJ125AX145-100 Is Used
Variable Product Changeover
Quickly reconfigure the 45-145mm retract distance on packaging lines to accommodate different carton or container sizes without changing the cylinder.
Machine Setup Calibration
Fine-tune the end-of-stroke position during initial commissioning to achieve precise mechanical alignment, avoiding the need for external stopper blocks.
Adjustable Forming Stops
Control the stroke window in light assembly or pressing applications where the exact material compression depth needs on-the-fly adjustment.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-100 the Right Cylinder?
Choose this 125mm bore when a smaller 100mm bore (providing 3681N pull at 0.5MPa) lacks the necessary thrust, but before stepping up to a 160mm bore (9425N pull) which adds excess bulk. The SAIJ125X145-100 is selected over a fixed-stroke SAI when a machine requires a highly variable end-stop, allowing you to fine-tune the 45-145mm travel window without swapping hardware. To match this cylinder for an ISO 15552 replacement, specify the 125mm bore, 145mm stroke, 100mm adjustment, PT G1/2 port, and your required mounting from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that FB, CA, CB, and CR mounts are omitted from this adjustable series.
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 SAIJ125AX145-100 FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of pull force and 6136N of push force. At the maximum 1.0MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster screw allows you to mechanically shorten the effective stroke from its 145mm nominal length down to as little as 45mm. This stopper only sets the travel end and does not lock the load without live air.
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