Airtac SAIJ125 Adjustable Cylinder SAIJ125AX40-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX40-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 40mm 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
- Stroke40 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX40-10
The AirTAC SAIJ125X40-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a SUS420J2 stainless steel rod and PT tapered port threads. The integrated adjuster provides a usable travel window of 30 to 40 mm, allowing precise end-position tuning without swapping components.
This adjustable stopper is ideal for product changeovers, letting you dial in the exact retract distance on the fly. The extruded aluminum barrel includes sensor grooves on both sides, and with a 125 mm bore, it safely operates within a 30 to 500 mm/s speed range.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX40-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX40-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 40 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 SAIJ125AX40-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×40 | 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 SAIJ125AX40-10 Is Used
Short-Stroke Clamping
Apply 6136N of clamping force with a 30-40 mm travel window, using the rear screw to dial in the exact grip distance for varying part thicknesses.
Commissioning Calibration
Fine-tune the end-of-stroke position during machine setup without physically swapping the cylinder or adding spacer shims to the fixture.
Product Changeover
Quickly adjust the retract distance on automated lines when switching product sizes, leveraging the 10 mm adjustment range for rapid format changes.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX40-10 the Right Cylinder?
Select this 125 mm bore cylinder when an application requires substantial force (6136N push at 0.5 MPa) but demands a very short, finely tunable stroke. If you need less force, stepping down to an 80 mm bore yields 2513N. Choose the SAIJ adjustable design over a fixed SAI when you need to trim the retract end-position during commissioning rather than machining external stops.
Remember that the rear adjuster acts only as a travel stop, not a lock; the cylinder cannot hold a load without live air. For positive holding, consider an external rod lock or the AirTAC SAIL series. This model uses the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets.
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 SAIJ125AX40-10 FAQ
At 0.5 MPa operating pressure, this 125 mm 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 screw acts as a mechanical stop, allowing you to shorten the 40 mm nominal stroke by up to 10 mm. This creates a usable travel window of 30 to 40 mm, though it does not lock the position without continuous air pressure.
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