Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 80mm 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
- Stroke80 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-30
The AirTAC SAIJ125X80-30 is a double-acting ISO 15552 profile cylinder equipped with a rear mechanical adjuster, allowing you to fine-tune the retract end-position without swapping out the unit. With an 80 mm nominal stroke and a 30 mm adjustment range, it provides a usable travel window of 50-80 mm. This bore size delivers substantial thrust, pushing 6136 N and pulling 5734 N at 0.5 MPa, making it suitable for heavy-duty positioning tasks.
The adjuster functions purely as a travel stop to set the end position and does not hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series. This model uses a robust 32 mm carbon steel rod with an M27x2 thread to handle high side-loading, and it supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 80 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 SAIJ125X80-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×80 | 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 SAIJ125X80-30 Is Used
Product Changeover Setup
Dial in the exact end-stop during line changeovers to accommodate different product lengths without physically replacing the actuator.
Heavy Press Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy pallets or tooling, using the 50-80 mm travel window to dial in the final contact point.
Variable End-Stop Limiting
Use the rear adjuster screw to safely shorten the retraction distance on the fly, preventing over-travel in delicate assembly processes.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-30 the Right Cylinder?
Choose this 125 mm bore cylinder when your application requires heavy force—stepping down to an 80 mm bore drops the 0.5 MPa push force to 2513 N, while stepping up to 160 mm increases it to 10053 N. The adjustable stroke is ideal for machine setups requiring variable end-stops during product changeovers, avoiding the need to bolt on external stops or buy a fixed-stroke SAI cylinder. If you need to replace an ISO 15552 cylinder, match the 80 mm stroke, 30 mm adjustment, PT G1/2 port, and the appropriate mounting accessory.
Because the nominal stroke is under 300 mm, external guide rails are less critical here than on longer strokes, though the 32 mm rod and M27x2 thread already provide excellent rigidity. Note that operating speed for this 125 mm bore is capped at 30-500 mm/s. Without a magnet, this specific SKU does not support position sensing; adding the -S option enables CMSE reed and DMSE electronic switches via the dual sensor grooves.
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 SAIJ125X80-30 FAQ
It features a rear mechanical adjuster that lets you shorten the effective travel from the nominal 80 mm down to 50 mm, creating a 50-80 mm usable window. This allows precise end-position tuning at commissioning without changing the cylinder.
At a 0.5 MPa operating pressure, it provides 6136 N of push force and 5734 N of pull force. At the maximum rated pressure of 1.0 MPa, the push force reaches 1251 kgf.
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