Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 150mm 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
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-30
The AirTAC SAIJ125X150-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 150 mm travel by up to 30 mm for a precise 120-150 mm usable window. Delivering 6136 N of push force at 0.5 MPa, it handles heavy-duty positioning with ease. The extruded aluminum barrel features sensor grooves on both sides, and this specific configuration utilizes a SUS420J2 stainless steel rod for enhanced corrosion resistance.
This model operates at speeds of 30-500 mm/s and relies on PT tapered port threads (G1/2) for secure pneumatic connections. The rear adjuster acts purely as a travel stop to fine-tune the end position during commissioning or product changeover without swapping the cylinder. It does not hold the load dynamically; for dead-load holding without live air, an external rod lock or a related SAIL pneumatic lock cylinder is required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 150 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 SAIJ125AX150-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×150 | 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 SAIJ125AX150-30 Is Used
Variable End-Stop Positioning
Dial in the exact retraction point between 120 and 150 mm during machine commissioning to accommodate varying material thicknesses without adding external mechanical stops.
Product-Size Changeover
Quickly adjust the stroke length on packaging or handling lines when switching between different product dimensions, minimizing downtime and avoiding cylinder replacement.
Heavy-Duty Forming Setup
Leverage the 6136 N push force to execute precise pressing or clamping operations, using the rear adjuster to fine-tune the final approach depth for different tooling setups.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-30 the Right Cylinder?
Select this 125 mm bore when a 100 mm bore (providing 3927 N push at 0.5 MPa) is insufficient, but a 160 mm bore (10053 N) would be physically oversized. The adjustable 120-150 mm travel window is ideal for production lines that undergo frequent product-size changeovers, eliminating the need to physically swap out fixed-stroke SAI cylinders. Mounting options are limited to the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2), deliberately omitting FB, CA, CB, and CR brackets.
Because the 150 mm stroke is relatively short for this large bore, side-loading is less severe than with longer strokes, but the substantial 32 mm rod diameter still requires external guiding for heavy off-center loads. To replicate this exact configuration, specify the 125 mm bore, 150 mm stroke, 30 mm adjustment code, PT port threads, SUS420J2 rod material (code A), and no magnet.
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 SAIJ125AX150-30 FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. If pressure is increased to 0.7 MPa, the push force rises to 8590 N.
The rear adjuster acts as a mechanical stop that lets you trim the effective stroke back from the 150 mm nominal length by up to 30 mm, creating a usable travel window of 120 to 150 mm. It only sets the end position and does not lock the load without live air pressure.
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