Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 55mm 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
- Stroke55 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-30
The AirTAC SAIJ125X55-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers substantial thrust, offering 6136N of pull force at 0.5 MPa and 8590N at 0.7 MPa. This specific SKU features a 55mm nominal stroke that can be dialed back by up to 30mm, providing a usable travel window of 25 to 55mm for precise end-position tuning during commissioning.
Built with a SUS420J2 stainless steel rod (material code A) and PT tapered port threads, it handles demanding environments effectively. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of switches. Remember that the rear adjuster acts purely as a mechanical stop for deceleration and does not lock the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 55 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 SAIJ125AX55-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×55 | 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 SAIJ125AX55-30 Is Used
Machine Setup Tuning
Dial in the exact retract end-position during initial commissioning using the 30mm adjustment range, avoiding the need for custom spacer shims.
Product Size Changeover
Quickly adapt a heavy-duty press line for different material thicknesses by shifting the travel window between 25 and 55mm on the fly.
Heavy Clamping Stops
Leverage the 8590N push force at 0.7 MPa to secure dense workpieces, using the rear stop to guarantee a consistent clamping depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-30 the Right Cylinder?
Choose this 125mm bore when your application requires heavy thrust that smaller neighbors cannot provide, such as stepping up from a 100mm bore that yields 3681N pull at 0.5 MPa. The adjustable 25-55mm travel window is ideal for product-size changeovers on a line, allowing you to fine-tune the retract distance without swapping the cylinder or adding external stops. For load-holding without continuous air pressure, select a SAIL or BSAI cylinder instead, as the SAIJ adjuster is only a stop.
As a dimensionally interchangeable ISO 15552 cylinder, it matches standard mounting footprints. Configuration details for this unit include a 55mm stroke, 30mm adjustment range, PT port threads, and no magnet (-S omitted). With a shorter 55mm stroke, side-load concerns are minimal, but always ensure standard mounting options like Basic, FA, LB, TC, FTC, TCM1, or TCM2 are utilized correctly.
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 SAIJ125AX55-30 FAQ
At 0.5 MPa, this 125mm 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 allows you to shorten the 55mm nominal stroke by up to 30mm, creating a usable travel window of 25 to 55mm. It functions as an end-position stop and does not hold the load without live air pressure.
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