Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 220mm 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
- Stroke220 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-20
The AirTAC SAIJ125X220-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 220 mm travel by up to 20 mm. This yields a precise 200-220 mm usable stroke window, enabling fine end-position tuning at commissioning without swapping out the cylinder or adding external stops. It delivers robust thrust, pushing 6136 N and pulling 5734 N at 0.5 MPa.
Built with a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance, this 125 mm bore unit utilizes PT tapered port threads (G1/2) and operates at speeds of 30-500 mm/s. The extruded aluminum barrel features sensor grooves on both sides, though this specific configuration omits the magnet, meaning CMSE or DMSE switches cannot be used without a model change.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 220 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 SAIJ125AX220-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×220 | 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 SAIJ125AX220-20 Is Used
Product Changeover
Quickly adjust the 200-220 mm travel window during packaging line format changes to accommodate different carton sizes without mechanical rebuilds.
End-Stop Calibration
Fine-tune the exact retraction point during machine commissioning to prevent crushing delicate workpieces with the 6136 N push force.
Variable Forming Stops
Set precise material bending depths on heavy-duty press equipment by dialing the rear adjuster rather than repositioning hard stops.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-20 the Right Cylinder?
Select this 125 mm bore cylinder when your application requires high force in the 6000 N range at standard 0.5 MPa pressure, but demands on-the-fly end-position adjustments for product changeovers. If your thrust requirements are lower, stepping down to a 100 mm bore provides 3927 N push force, whereas moving up to a 160 mm bore yields 10053 N. The rear adjuster acts purely as a travel stop and does not hold the load without live air; for true load-holding without pneumatic pressure, consider the SAIL or BSAI series.
To match this exact ISO 15552 footprint for a direct replacement, confirm the 125 mm bore, 220 mm stroke, 20 mm adjustment range, PT port thread, and the absence of a magnet. Because the 220 mm stroke is under the 300 mm threshold, side-load risks are moderate, but the 32 mm rod diameter handles standard guiding competently. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
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 SAIJ125AX220-20 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. At 0.9 MPa, the push force increases to 11045 N.
The rear adjuster screw allows you to shorten the 220 mm nominal stroke by up to 20 mm, creating a 200-220 mm usable travel window. It functions as a mechanical stop and does not lock the load without continuous air pressure.
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