Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 105mm 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
- Stroke105 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-40
The AirTAC SAIJ125X105-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 65-105 mm usable travel window, enabling you to dial back the 105 mm nominal stroke by up to 40 mm. This bore size delivers 6133 N of push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks.
This specific SKU is configured with a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though this unit is specified without a magnet. Mounting options are restricted to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 105 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 SAIJ125AX105-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×105 | 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 SAIJ125AX105-40 Is Used
Machine Changeover
Fine-tune the 65-105 mm travel window during product size transitions on a packaging line without physically swapping the cylinder.
End-Stop Calibration
Dial in the exact retract position during initial commissioning to perfect a heavy-duty pressing or clamping action.
Variable Positioning
Adjust the effective stroke length on the fly to accommodate varying material thicknesses in an automated assembly process.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-40 the Right Cylinder?
Select this 125 mm bore cylinder when your application requires 6133 N of push force at 0.5 MPa. If you need less thrust, stepping down to an 80 mm bore yields 2513 N, whereas a 100 mm bore provides 3927 N. The adjustable stroke is ideal for machine changeovers, allowing you to fine-tune the retract end position without swapping cylinders or adding external stops.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 105 mm stroke, 40 mm adjustment range, PT port thread, and the specified mounting style. Note that the rear adjuster functions strictly as a travel stop, not a lock; the cylinder cannot hold a load without live air pressure. For load-holding requirements without continuous air, consider the AirTAC SAIL or BSAI series.
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 SAIJ125AX105-40 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6133 N of push force and 5734 N of pull force. It can reach up to 11045 N of push force at 0.9 MPa.
The rear adjuster acts as a mechanical stop that trims the effective travel. For this 105 mm stroke model, the -40 code means you can shorten the stroke by up to 40 mm, creating a 65-105 mm usable travel window for precise end-position tuning.
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