Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 145mm 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
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-75S
The AirTAC SAIJ125X145-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling precise end-position tuning without adding external stops. Featuring a 125mm bore, it yields 6136N of pull force at 0.5MPa and incorporates a standard carbon steel rod with a PT tapered port thread. An integrated magnet allows position feedback via CMSE reed or DMSE electronic sensors.
This specific SKU provides a generous 75mm adjustment range, creating a usable travel window between 70 and 145mm. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2 attachments. The rear screw acts purely as a travel stop for commissioning flexibility and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 145 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 SAIJ125X145-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×145 | 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 SAIJ125X145-75S Is Used
Variable End-Stop Setup
Dial in the exact travel distance between 70 and 145mm during machine commissioning to accommodate different product sizes without replacing the cylinder.
Heavy Press Positioning
Leverage the 125mm bore's 6136N pull force for heavy-duty pressing and forming tasks that require precise lower-end position tuning.
Automated Changeover Lines
Quickly adjust the retract stop for production line changeovers, using the integrated magnet and DMSE sensors to confirm the tuned end position.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-75S the Right Cylinder?
Select this 125mm bore unit when your application requires heavy push or pull forces—up to 6136N at 0.5MPa or 8590N at 0.7MPa—and a highly variable end-of-stroke position. The 75mm adjustment window is ideal for product changeovers on a line, letting operators dial in the exact 70-145mm travel without swapping cylinders. If your force requirements are lower, stepping down to a 100mm bore provides 3681N pull at 0.5MPa.
Because the nominal stroke is 145mm, the M27x2 rod is well-supported and side-load risks are minimal, though external guides are always recommended for lateral loads. Remember that the rear adjuster and air cushions only decelerate the travel end; they do not function as a lock. For fail-safe load holding without live air, specify an SAIL pneumatic lock or BSAI clamp-lock cylinder. This unit is dimensionally interchangeable per ISO 15552.
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 SAIJ125X145-75S FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 75mm. This creates a usable travel window from 70mm to the full 145mm, letting you fine-tune the end position at commissioning without external stops.
At a 0.5MPa operating pressure, it provides 6136N of pull force and 5734N of push force. At 0.7MPa, the push force increases to 8590N.
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