Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 90mm 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
- Stroke90 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-40S
The AirTAC SAIJ125X90-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to fine-tune the travel window between 50 and 90 mm during commissioning. Delivering 6136 N of push force at 0.5 MPa, it handles heavy loads with precision. The extruded aluminum barrel features sensor grooves on both sides for flexible mounting.
This specific SKU ships with a SUS420J2 stainless steel rod (option A) for superior corrosion resistance and uses PT tapered port threads. It includes a magnet for position sensing, working seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 90 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 SAIJ125AX90-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×90 | 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 SAIJ125AX90-40S Is Used
Press Tonnage Tuning
Dial in the exact 50-90 mm travel window during machine setup to accommodate varying material thicknesses without changing the cylinder.
Product Changeover
Quickly adjust the end-stop position on a packaging line when switching to a different product size, saving downtime.
Heavy-Duty Forming
Leverage the 6136 N push force at 0.5 MPa for heavy forming operations while using the rear screw to set precise bottoming depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-40S the Right Cylinder?
Choose this 125 mm bore when the 80 mm class (2513 N push at 0.5 MPa) is insufficient for your application. The adjustable stroke is ideal for product changeovers, allowing you to dial in the exact end position without swapping cylinders or adding external stops. For load-holding without continuous air pressure, consider the SAIL or BSAI series instead, as the SAIJ adjuster is not a lock.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 90 mm nominal stroke, 40 mm adjustment range, PT G1/2 port, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. At 90 mm stroke, side-load is minimal, but always guide the load for optimal bearing life.
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 SAIJ125AX90-40S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa, it delivers 1251 kgf.
The rear adjuster screw allows you to shorten the effective travel from the 90 mm nominal stroke down to 50 mm. This creates a 50-90 mm usable window for fine-tuning the retract end position at commissioning.
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Standard models usually ship in 3-4 days.
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