Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 290mm 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
- Stroke290 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-30
The AirTAC SAIJ125X290-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 260 to 290 mm, allowing you to dial back the nominal 290 mm stroke by up to 30 mm during commissioning without adding external stops. Equipped with a PT G1/2 port and a 32 mm SUS420J2 stainless steel rod, it delivers 6136 N of push force at 0.5 MPa.
This adjustable-stroke model uses variable air cushions at both ends to manage deceleration, but the rear adjuster acts strictly as a travel stop, not a load-holding lock. It supports a speed range of 30-500 mm/s and uses an extruded aluminum barrel with sensor grooves on both sides. For position feedback, you can add a magnet (-S) to enable AirTAC CMSE reed or DMSE electronic sensors.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 290 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 SAIJ125AX290-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×290 | 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 SAIJ125AX290-30 Is Used
Variable End-Stop Positioning
Fine-tune the retraction point within a 260 to 290 mm window to accommodate multiple product sizes on a single assembly fixture.
Product Changeover Diverter
Adjust the stroke on the fly during line format changes, eliminating the need to physically swap out cylinders for different package lengths.
Commissioning Stroke Calibration
Dial in the exact end-of-stroke position during machine setup to prevent mechanical interference and optimize cycle timing.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-30 the Right Cylinder?
Choose this 125 mm bore when an 80 mm cylinder lacks thrust, offering 2513 N at 0.5 MPa compared to the 6136 N provided here. The adjustable stroke is ideal for product changeovers on packaging lines where exact end positions vary, saving the effort of swapping a fixed-stroke SAI cylinder. Because the stroke is 290 mm, an external guide is recommended to prevent side-load damage to the rod.
When specifying a replacement, match the 125 mm bore, 290 mm stroke, 30 mm adjustment, PT G1/2 port, and basic mounting style. If your application requires holding a load without live air pressure, select an SAIL pneumatic lock or BSAI clamp-lock cylinder instead, as the SAIJ adjuster cannot hold loads. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125AX290-30 FAQ
The rear adjuster acts as a mechanical stop that shortens the effective travel. For this SAIJ125X290-30 model, you can trim the 290 mm stroke back by up to 30 mm, creating a usable travel window of 260 to 290 mm.
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. It can reach a maximum push force of 11045 N at 0.9 MPa.
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