Airtac SAIJ125 Adjustable Cylinder SAIJ125AX45-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX45-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 45mm 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
- Stroke45 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX45-30
The AirTAC SAIJ125X45-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 45 mm stroke that can be dialed back by up to 30 mm, creating a highly flexible 15-45 mm usable travel window for precise end-position tuning during commissioning. In the 125 mm bore class, it delivers substantial thrust, generating 6136 N of pull force at 0.5 MPa and reaching 8590 N at 0.7 MPa.
This specific SKU is configured with a SUS420J2 stainless steel rod (material code A) for improved corrosion resistance compared to standard carbon steel. It uses PT tapered port threading (G1/2) and operates without a piston magnet. The extruded aluminum barrel design includes sensor grooves on both sides, and the mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX45-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX45-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 45 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 SAIJ125AX45-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×45 | 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 SAIJ125AX45-30 Is Used
Variable End-Stop Clamping
Dial in the exact 15-45 mm clamping depth during machine setup without changing hardware, accommodating varying material thicknesses on the fly.
Product Changeover
Quickly adjust the retract end-position during production line changeovers to handle different package or part dimensions efficiently.
Heavy Forming Press
Leverage the 6136 N pull force at 0.5 MPa for robust pressing operations while fine-tuning the stroke to prevent over-travel.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX45-30 the Right Cylinder?
Choose this 125 mm bore cylinder when an application requires heavy force combined with a short, variable end-stop. If you need less push force, stepping down to the 100 mm bore yields 3927 N at 0.5 MPa, whereas moving up to the 160 mm bore provides 10053 N. The integrated rear screw stopper allows you to fine-tune the retract position without swapping out the cylinder or adding external stops, which is ideal for product-size changeovers on a line.
Because the nominal stroke is 45 mm, no external side-load guide is strictly required, but the robust 32 mm rod and M27x2 thread handle high stress well. Remember that the rear adjuster acts only as a travel stop, not as a lock; the SAIJ does not hold loads without live air pressure. For load-holding requirements, select the SAIL or BSAI series instead. To match this ISO 15552 interchangeable cylinder, specify: 125 mm bore, 45 mm stroke, 30 mm adjustment, PT G1/2 port, no magnet, and SUS420J2 rod.
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 SAIJ125AX45-30 FAQ
It features a rear external screw stopper that lets you shorten the effective stroke by up to 30 mm. This creates a usable travel window of 15-45 mm, allowing you to fine-tune the retract end-position at commissioning without external stops.
At 0.5 MPa operating pressure, it provides 6136 N of pull force and 5734 N of push force. At 0.7 MPa, the push force increases to 8590 N.
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