Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 80mm 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
- Stroke80 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-30
The AirTAC SAIJ125X80-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers 8590N of push force and 5734N of pull force at 0.7 MPa, making it suited for heavy-duty handling. The integrated rear stopper allows you to fine-tune the effective travel window down to a 50-80mm range without swapping the barrel.
This unit uses an SUS420J2 stainless steel rod for enhanced corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. The rear adjuster functions purely as a travel stop for end-position tuning and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 80 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 SAIJ125AX80-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×80 | 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 SAIJ125AX80-30 Is Used
Variable End-Stop Tuning
Dial in the exact retraction point within the 50-80mm travel window during machine commissioning to accommodate varying product widths without hardware changes.
Heavy-Duty Changeover
Leverage the 8590N push force to shift heavy pallets or fixtures, adjusting the stroke length mechanically on the line for different packaging formats.
Position Calibration
Use the rear stopper screw to precisely set the retracted end position for high-repeatability pressing or clamping tasks within the 30mm adjustment range.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-30 the Right Cylinder?
Choose this 125mm bore when a 100mm bore (providing 5497N push at 0.7 MPa) lacks sufficient thrust for your heavy loads. The 30mm adjustment range is ideal for product-size changeovers, allowing you to dial in the exact end-stop on the fly instead of installing fixed external stops or reverting to a standard SAI cylinder. For load-holding without continuous air pressure, consider the SAIL or BSAI series instead of relying on this adjuster.
When replacing an ISO 15552 cylinder, match the 125mm bore, 80mm nominal stroke, PT port threads, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that FB, CA, CB, and CR mounts are omitted from this adjustable variant. The 32mm rod and M27x2 thread provide robust side-load capacity, though long unsupported strokes still require an external guide.
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 SAIJ125AX80-30 FAQ
At 0.7 MPa operating pressure, this 125mm bore cylinder provides a push force of 8590N and a pull force of 5734N. It can reach a maximum push force of 11045N at 0.9 MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the 80mm nominal stroke by up to 30mm, creating a usable travel window of 50-80mm. It only sets the end position and does not lock or hold the load without live air pressure.
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