Airtac SAIJ125 Adjustable Cylinder SAIJ125AX30-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX30-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 30mm 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
- Stroke30 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX30-30
The AirTAC SAIJ125X30-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. With a 30 mm nominal stroke and a 30 mm adjustment range, it provides a 0 to 30 mm usable travel window. This allows operators to dial in the exact end-of-stroke position during commissioning without adding external stops. It delivers a robust 6133 N push force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks.
This model is equipped with a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. Mounting options include the reduced SAIJ set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. The variable air cushions at both ends work alongside the rear adjuster to decelerate the load smoothly.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX30-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX30-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 30 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 SAIJ125AX30-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×30 | 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 SAIJ125AX30-30 Is Used
Precision End-Stop Tuning
Dial in the exact retraction point within the 0-30 mm travel window during machine setup to achieve precise positioning without machining custom spacers.
Rapid Product Changeover
Quickly adjust the stroke end-position on a packaging line when switching between different product sizes, minimizing downtime between runs.
Heavy-Duty Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy pallets or fixtures into place, using the rear stop to guarantee repeatable final placement.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX30-30 the Right Cylinder?
Choose this 125 mm bore cylinder when an application requires substantial force—6136 N at 0.5 MPa—that a 100 mm bore (3927 N) cannot provide, but without stepping up to the massive 160 mm size (10053 N). The adjustable stroke is ideal for product changeovers on a line where the required retraction distance varies slightly. Because the rear adjuster acts only as a travel stop and the air cushions manage deceleration, this cylinder will not hold a load without continuous live air pressure; for fail-safe load holding, consider the SAIL or BSAI series. When matching an ISO 15552 replacement, verify the 125 mm bore, 30 mm stroke, PT port threads, and desired mounting interface. Since the stroke is 30 mm, side-load stress is minimal, but always ensure the load is guided to prevent rod binding.
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 SAIJ125AX30-30 FAQ
At 0.5 MPa operating pressure, the 125 mm bore generates a push force of 6136 N and a pull force of 5734 N. At the maximum 1.0 MPa pressure, it provides up to 1251 kgf of thrust.
The rear adjuster acts as an external stopper that lets you trim the effective stroke back by up to 30 mm from the 30 mm nominal stroke. This creates a 0-30 mm adjustable travel window for fine-tuning the end position at commissioning.
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