Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-75 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 SAIJ125AX105-75
The AirTAC SAIJ125X105-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 30 to 105 mm, allowing you to dial back the nominal 105 mm stroke by up to 75 mm during commissioning. Delivering a robust 6136 N push force at 0.5 MPa, it handles heavy-duty positioning tasks with ease.
This variant features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, although this specific unit is non-magnetic and does not support CMSE or DMSE switches. The rear adjuster acts purely as a mechanical stop to set the end position; it does not hold the load without live air pressure, so applications requiring true load-holding should consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-75 |
|---|---|
| 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 SAIJ125AX105-75
| 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 SAIJ125AX105-75 Is Used
Machine Setup Changeover
Fine-tune the 30-105 mm travel window during product size transitions on a packaging line without bolting on external stops or changing the cylinder.
Heavy-Duty Positioning
Leverage the 6136 N push force at 0.5 MPa to push heavy pallets or fixtures into an exact end position determined by the rear adjuster.
Fixture Alignment
Use the 75 mm adjustment range to perfectly align clamping fixtures against varying workpiece thicknesses during commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-75 the Right Cylinder?
Choose this 125 mm bore when you need substantial thrust—such as the 6136 N push force at 0.5 MPa—that smaller bores cannot provide. If your application requires less force, stepping down to a 100 mm bore yields 3927 N of push force at 0.5 MPa. The adjustable stroke is ideal for product changeovers on a line, letting you fine-tune the end position without swapping the cylinder or adding external stops.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 105 mm nominal stroke, 75 mm adjustment range, PT G1/2 port, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the total stroke exceeds 300 mm in longer variants, external guides are recommended for high side-loads, though this 105 mm stroke is well within standard limits. Remember that the rear adjuster is a travel stop, not a lock.
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 SAIJ125AX105-75 FAQ
At 0.5 MPa, it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster lets you mechanically shorten the 105 mm nominal stroke down to a minimum of 30 mm, creating a 30-105 mm usable travel window. It acts as a physical stop and does not lock the load without air pressure.
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