Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 180mm 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
- Stroke180 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-30S
The AirTAC SAIJ125X180-30-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a robust 6136N push force at 0.5 MPa and features a 150 to 180mm usable travel window, letting you trim the retract position by up to 30mm during commissioning. The extruded aluminum barrel includes sensor grooves on both sides, and because this SKU carries the -S magnet, it directly supports AirTAC CMSE reed and DMSE electronic solid-state switches for precise end-of-stroke detection.
This pneumatic actuator uses a PT tapered port thread and a 32mm carbon steel rod with an M27x2 thread. The rear adjuster acts purely as a mechanical stop to fine-tune the end position without swapping components, while the standard air cushions handle deceleration. It is dimensionally interchangeable per ISO 15552 and utilizes a specific mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 180 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 SAIJ125X180-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×180 | 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 SAIJ125X180-30S Is Used
Product Size Changeover
Dial in the 150-180mm travel window on the fly to accommodate different package lengths on a packaging line without swapping hardware.
Machine Setup Fine-Tuning
Use the 30mm rear stopper to precisely set the retract end-position during commissioning, avoiding the need for machined spacer shims.
Heavy Fixture Positioning
Leverage the 6136N push force to shift heavy welding or clamping fixtures, relying on the 32mm rod to maintain structural rigidity.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-30S the Right Cylinder?
Choose this 125mm bore when an 80mm bore (delivering 2513N push at 0.5MPa) is insufficient for moving heavy fixtures, but a 160mm bore is unnecessarily large. The adjustable 150-180mm travel window is perfect for production lines running multiple product sizes, allowing rapid changeover without replacing the cylinder or adding external stops. For strokes of 180mm, the 32mm rod handles side loads well, though any long unsupported loads should still use an external guide.
When specifying a replacement, verify the 125mm bore, 180mm nominal stroke, 30mm adjustment range, PT port thread, and the -S magnet. Remember that the rear adjuster is a travel stop, not a locking device; if the machine requires true load-holding without live air pressure, select an AirTAC SAIL or BSAI cylinder instead.
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 SAIJ125X180-30S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder generates a push force of 6136N and a pull force of 5734N. At 0.7 MPa, the push force increases to 8590N.
The rear mechanical stopper allows you to shorten the effective stroke by up to 30mm from the 180mm nominal length, creating a 150-180mm usable travel window. It functions as a hard stop and does not lock the load without live air pressure.
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