Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 75mm 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
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-75
The AirTAC SAIJ125X75-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 6136N of push force at 0.5 MPa and provides a usable travel window of 0-75 mm, letting you dial in the exact end position during commissioning without adding external stops. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches.
This model utilizes a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and features PT tapered port threads. The rear adjuster acts purely as a travel stop to set deceleration and end limits; it is not a lock. The cylinder supports a speed range of 30-500 mm/s and offers variable air cushions at both ends to absorb kinetic energy.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 75 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 SAIJ125AX75-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 SAIJ125AX75-75 Is Used
Variable End Stops
Dial in the exact retract position within the 0-75mm window during machine commissioning to accommodate varying material thicknesses without external stop blocks.
Product Changeover
Quickly adjust the effective stroke on packaging lines when switching between different package sizes, minimizing downtime and avoiding cylinder swaps.
Machine Setup
Fine-tune the end-of-travel position during initial equipment assembly to perfectly align tooling, utilizing the 6136N of thrust for heavy forming tasks.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-75 the Right Cylinder?
Choose this 125mm bore adjustable cylinder when your application requires precise end-position tuning during machine setup or product changeover. If you need less force, stepping down to a 100mm bore yields 3927N of push thrust at 0.5 MPa, while stepping up to a 160mm bore provides 10053N. The SAIJ125X75-75 is selected over a fixed SAI model specifically for its 0-75mm adjustable window, allowing variable end stops without swapping hardware.
Because the nominal stroke is under 300mm, side-load stress on the 32mm rod is moderate, though long unsupported loads still require an external guide. Remember that the rear adjuster and air cushions do not hold the load without live air; for fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder. This profile cylinder is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and 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 SAIJ125AX75-75 FAQ
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective travel anywhere within a 0-75mm window from the nominal 75mm stroke. It sets the end position and decelereration point but does not lock the load without continuous air pressure.
At 0.5 MPa operating pressure, the SAIJ125X75-75 provides 6136N of push force and 5734N of pull force. It can deliver up to 1251 kgf at its maximum 1.0 MPa operating pressure.
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