Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-30 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 SAIJ125AX90-30
The AirTAC SAIJ125X90-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end position during commissioning. With a nominal 90 mm stroke and a 30 mm adjustment range, it provides a usable travel window of 60 to 90 mm, letting you dial in the exact retract distance without adding external stops. It delivers a robust 6136 N push force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks.
This SKU is configured with a SUS420J2 stainless steel rod for superior corrosion resistance and uses PT tapered G1/2 ports. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE electronic sensors. Remember that the rear adjuster acts as a travel stop to set the end position; it does not lock or hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-30 |
|---|---|
| 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 SAIJ125AX90-30
| 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 SAIJ125AX90-30 Is Used
Variable End-Stop Positioning
Perfect for assembly stations where the retract position needs on-the-fly fine-tuning across a 60-90 mm window to accommodate different part heights.
Product Size Changeover
Enables rapid line adjustments for varying product dimensions without physically replacing the cylinder or bolting on external mechanical stops.
Heavy-Duty Clamping
Leveraging 6136 N of push force at 0.5 MPa to securely hold large workpieces while the rear adjuster ensures precise clamping depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-30 the Right Cylinder?
Choose this 125 mm bore when your application requires high thrust—6136 N at 0.5 MPa or 8590 N at 0.7 MPa. If your force requirements are lower, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa, which might save space and air consumption. The adjustable stroke is ideal for machines that undergo frequent product changeovers, allowing you to reposition the retract end-stop on the fly rather than swapping out a fixed-stroke SAI cylinder.
For load-holding without continuous air pressure, this standard SAIJ configuration will not suffice, as the adjuster and air cushions only decelerate the travel end. You would need to explore an SAIL pneumatic lock or BSAI clamp-lock cylinder instead. This model uses PT G1/2 ports and supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2. Operating speed is 30-500 mm/s.
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 SAIJ125AX90-30 FAQ
At an operating pressure of 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 effective stroke by up to 30 mm. This creates a usable travel window of 60 to 90 mm from the 90 mm nominal stroke, enabling precise end-position tuning at commissioning without replacing the cylinder.
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