Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 165mm 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
- Stroke165 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-30
The AirTAC SAIJ125X165-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. Its external stopper allows you to dial back the 165mm nominal stroke by up to 30mm, creating a precise 135-165mm usable travel window. This fine-tuning capability is ideal for optimizing end positions during commissioning without swapping hardware.
This unit features a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and pairs with PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. While the rear adjuster sets the travel end, note that it functions purely as a stop and does not hold the load without continuous live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 165 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 SAIJ125AX165-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×165 | 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 SAIJ125AX165-30 Is Used
Product Changeovers
Dial in the 135-165mm travel window on the fly to accommodate different package sizes on a packaging line without changing the cylinder.
End-Position Trimming
Fine-tune the retract end-position during machine commissioning to achieve exact pressing or forming depths without external stoppers.
Heavy-Duty Clamping
Leverage the 6136N push force at 0.5 MPa to securely clamp large workpieces while using the adjuster to set the exact clamping depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-30 the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder (providing 2513N push at 0.5 MPa) lacks the necessary thrust, but a 160mm bore (10053N) would be excessive. The 30mm adjustment range is perfect for applications requiring variable end-stops or frequent product-size changeovers, eliminating the need to bolt on external stops or swap out a fixed-stroke SAI cylinder. To replace an ISO 15552 cylinder, match the 125mm bore, 165mm stroke, PT port threads, and desired mounting from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the 165mm stroke is under 300mm, side-load concerns are minimal, though the robust 32mm rod and M27x2 thread handle standard loads effectively. For applications requiring true load-holding without air pressure, consider an AirTAC SAIL or BSAI cylinder instead of relying on the adjuster.
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 SAIJ125AX165-30 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster acts as an external stopper that allows you to shorten the 165mm nominal stroke by up to 30mm, providing a usable travel window of 135-165mm. It sets the travel end but does not lock the load without live air pressure.
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