Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-10S 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 SAIJ125AX155-10S
The AirTAC SAIJ125X155-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to dial back the nominal 155 mm stroke by up to 10 mm for a precise 145-155 mm usable travel window. It delivers 6133 N of push force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks. This variant features a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and includes a built-in magnet for position sensing.
Unlike a fixed-stroke SAI cylinder, this model lets you fine-tune the retract end-position at commissioning or during product changeover without swapping the hardware or adding external stops. The rear adjuster acts strictly as a travel stop to set deceleration, not as a lock; it will not hold a load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-10S |
|---|---|
| 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 SAIJ125AX155-10S
| 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 SAIJ125AX155-10S Is Used
Machine Changeover
Quickly adjust the 145-155 mm travel window during product size changeovers on a packaging line without replacing the cylinder.
End-Position Tuning
Fine-tune the retract stop during commissioning to perfect heavy-duty press fits, utilizing the 6136 N push force.
Heavy Fixture Handling
Move heavy industrial fixtures with the robust 32 mm SUS420J2 stainless steel rod resisting side loads and corrosion.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-10S the Right Cylinder?
Select this 125 mm bore cylinder when your application requires substantial thrust—stepping down to an 80 mm bore yields 2513 N at 0.5 MPa, which is often insufficient for heavier fixtures, while stepping up to a 160 mm bore provides 10053 N. The 10 mm adjustment range is perfect for applications needing minor end-position corrections rather than large travel changes. Because the 155 mm stroke is under the 300 mm threshold, external side-load guides are less critical than with longer strokes, though the robust 32 mm rod and M27x2 thread handle substantial side loads effectively.
To match this ISO 15552 cylinder for a replacement, verify the 125 mm bore, 155 mm stroke, 10 mm adjustment, PT tapered port threads, and the -S magnet requirement for CMSE reed or DMSE electronic sensors. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets.
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 SAIJ125AX155-10S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw allows you to shorten the 155 mm nominal stroke by up to 10 mm, creating a 145-155 mm usable travel window. It functions as a mechanical stop to set the end position and does not lock the load without air pressure.
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