Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 500mm 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
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-30
The AirTAC SAIJ125X500-30 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 500 mm nominal stroke that can be dialed back by up to 30 mm, creating a 470-500 mm usable travel window for fine-tuning end positions during commissioning. Featuring a SUS420J2 stainless steel rod (code A) and PT tapered port threads, it delivers 6136 N of push force at 0.5 MPa.
This model utilizes a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR options. The rear adjuster acts purely as a mechanical stop to set deceleration and travel limits; it does not lock or hold the load without live air pressure. For position holding, an external rod lock or SAIL cylinder is required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 500 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 SAIJ125AX500-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×500 | 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 SAIJ125AX500-30 Is Used
Machine Changeover
Dial in the 470-500 mm travel window during product size transitions to set new end positions rapidly without replacing the cylinder.
End-Position Tuning
Fine-tune the retract stopper at commissioning to dial out mechanical drift or tolerance stack-up without adding external stops.
Heavy-Duty Forming
Leverage the 6136 N push force at 0.5 MPa for pressing applications where the exact bottoming position must be adjusted on the fly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-30 the Right Cylinder?
Choose this 125 mm bore when you need substantial thrust (6136 N push at 0.5 MPa) and a variable end-stop, stepping up from the 80 mm bore which yields 2513 N. The adjustable 470-500 mm window is perfect for machine setups requiring product changeovers without swapping cylinders. Because the 500 mm stroke is unsupported over a long distance, an external guide is recommended to prevent side-load damage to the rod.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 500 mm stroke, 30 mm adjustment range, PT G1/2 port, and appropriate mounting. Note that because no magnet (-S) is specified, this SKU cannot support AirTAC CMSE or DMSE sensors without modification. If load-holding is required, select a SAIL or BSAI series instead of relying on the rear stopper.
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 SAIJ125AX500-30 FAQ
The rear adjuster screw lets you shorten the effective travel by up to 30 mm, providing a 470-500 mm usable window. It acts as a mechanical stop to fine-tune the end position without swapping the cylinder.
At 0.5 MPa, it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
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