Airtac SAIJ125 Adjustable Cylinder SAIJ125AX110-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX110-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 110mm 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
- Stroke110 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX110-40
The AirTAC SAIJ125X110-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 70 to 110 mm, allowing you to dial back the 110 mm nominal stroke by up to 40 mm during commissioning. This bore size generates a push force of 6136 N and a pull force of 5734 N at 0.5 MPa, making it well-suited for heavy-duty positioning tasks.
This specific configuration includes a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. It lacks a magnet for electronic sensing, but the extruded aluminum barrel retains sensor grooves on both sides for external mounting. The integrated variable air cushions at both ends work alongside the rear mechanical stopper to decelerate the load smoothly.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX110-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX110-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 110 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 SAIJ125AX110-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×110 | 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 SAIJ125AX110-40 Is Used
Machine Setup Tuning
Dial in the exact 70 to 110 mm end-position during initial commissioning to achieve perfect mechanical alignment without machining custom spacers.
Product Changeover
Quickly adapt the stroke length on a production line when switching to a different product size, using the 40 mm adjustment range to accommodate new dimensions.
Heavy Assembly Pressing
Leverage the 6136 N push force at 0.5 MPa to securely seat components, relying on the rear stopper to consistently set the precise pressing depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX110-40 the Right Cylinder?
Choose this 125 mm bore cylinder when a 100 mm bore (offering 3927 N push at 0.5 MPa) lacks sufficient force, but a 160 mm bore (10053 N at 0.5 MPa) would be physically oversized. The adjustable stroke is ideal for machine setups requiring precise end-position tuning without swapping out the cylinder or adding bulky external stops. Because the stroke is 110 mm, side-load risks are minimal, though long unsupported strokes would require an external guide.
For load-holding applications, note that the rear adjuster acts strictly as a travel stop and the air cushions only decelerate the motion; neither will hold the load without live air pressure. For true locking needs, consider the SAIL (air-released lock) or BSAI (clamp-lock) series. To replace this cylinder in an ISO 15552 footprint, match the 125 mm bore, 110 mm stroke, 40 mm adjustment, PT tapered port, and the SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
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 SAIJ125AX110-40 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster acts as a mechanical stop that allows you to shorten the 110 mm nominal stroke by up to 40 mm, creating a usable travel window of 70 to 110 mm. It sets the end position but does not lock or hold the load without continuous air pressure.
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