Airtac SAIJ125 Adjustable Cylinder SAIJ125X155-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X155-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 155mm 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
- Stroke155 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X155-10
The AirTAC SAIJ125X155-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 145 to 155 mm. It delivers a robust 6136 N push force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks. The extruded aluminum barrel features sensor grooves on both sides for straightforward detection integration.
This model utilizes a PT tapered port and a 32 mm carbon steel rod with an M27x2 thread, providing a rigid interface that handles substantial side loads. The rear adjustment screw acts purely as a mechanical stop to decelerate the travel end; it does not hold the load without live air pressure. For load-holding requirements without continuous air, an external rod lock or related types like SAIL or BSAI are required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X155-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X155-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 155 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 SAIJ125X155-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×155 | 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 SAIJ125X155-10 Is Used
Variable End Stops
Dial in the 145-155 mm travel window during product size changeovers to avoid physically swapping the cylinder.
Commissioning Fine-Tune
Use the rear screw to precisely set the retraction end-position without bolting on external stopper blocks.
Heavy Positioning
Leverage the 6136 N push force to move substantial jigs or fixtures into their exact working coordinates.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X155-10 the Right Cylinder?
Select this 125 mm bore when a 100 mm bore (offering 3927 N push at 0.5 MPa) lacks the necessary thrust, but a 160 mm bore (10053 N) would be excessive. The adjustable stroke is chosen over a fixed SAI cylinder to fine-tune the end position during machine setup or product changeover without adding external stops. When replacing an ISO 15552 cylinder, match the 155 mm stroke, 10 mm adjustment, PT port, and mounting from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the stroke is under 300 mm, side-load stress is minimal, though an external guide is still recommended for heavy loads.
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 SAIJ125X155-10 FAQ
At 0.5 MPa it provides 6136 N push and 5734 N pull force. At 0.7 MPa the push force increases to 8590 N.
The rear adjuster screw lets you shorten the 155 mm nominal stroke by up to 10 mm, creating a 145-155 mm travel window for fine-tuning without swapping cylinders.
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Standard models usually ship in 3-4 days.
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