Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-30 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 SAIJ125AX145-30
The AirTAC SAIJ125X145-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a SUS420J2 stainless steel rod and PT tapered ports. The built-in rear stopper allows you to trim the nominal 145mm stroke back by up to 30mm, creating a precise 115-145mm usable travel window for exact end-position tuning.
This adjustable travel range is ideal for product-size changeovers on a line, letting you fine-tune the retract position without swapping the cylinder or adding external stops. The extruded aluminum profile includes sensor grooves on both sides, and operating speed spans 30-500mm/s. Remember that the rear adjuster acts only as a travel stop, not a lock, so it will not hold a load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-30 |
|---|---|
| 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 SAIJ125AX145-30
| 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 SAIJ125AX145-30 Is Used
Product Size Changeovers
Dial in the 115-145mm travel window on the fly to accommodate different product lengths without physically swapping out the pneumatic cylinder.
Commissioning Fine-Tuning
Use the rear stopper to precisely set the retract end-position during initial machine setup, avoiding the need to bolt on custom external stops.
Heavy-Duty Forming
Leverage the 6136N push force at 0.5 MPa for pressing or forming tasks where the exact bottoming-out position requires slight field adjustment.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-30 the Right Cylinder?
Choose this 125mm bore when a 100mm bore (offering 3927N push at 0.5 MPa) lacks the necessary thrust, but a 160mm bore (10053N) is physically too large. The 30mm adjustment window is perfect for applications needing variable end-stops during commissioning, replacing the need for a fixed-stroke SAI cylinder when exact positioning is not yet finalized. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. For load-holding without live pressure, consider an external rod lock or the SAIL/BSAI series.
Because this unit features a 145mm stroke, side-load risks are moderate, but you should still ensure proper external guiding to protect the 32mm rod and M27x2 rod thread. As a dimensionally interchangeable ISO 15552 cylinder, it matches standard mounting footprints. To replicate this exact configuration, specify the 125mm bore, 145mm stroke, 30mm adjustment, PT ports, SUS420J2 rod material, and no magnet.
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 SAIJ125AX145-30 FAQ
The rear adjusting screw acts as a mechanical stopper that lets you shorten the effective stroke by up to 30mm. This creates a usable travel window of 115-145mm, allowing you to trim the retract position without replacing the cylinder.
At an operating pressure of 0.5 MPa, the SAIJ125X145-30 provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9 MPa.
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