Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-30 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 SAIJ125X180-30
The AirTAC SAIJ125X180-30 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 150 to 180 mm, allowing you to dial back the nominal 180 mm stroke by up to 30 mm during machine commissioning without adding external stops. In the 125 mm bore class, it generates 6136 N of push force and 5734 N of pull force at 0.5 MPa.
This heavy-duty actuator uses a G1/2 port and a 32 mm carbon steel rod with an M27x2 thread, providing a robust interface for high-load tasks. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches, though this specific configuration ships without a magnet. The rear adjuster functions strictly as a travel stop to set the end position and relies on the integrated air cushions for deceleration; it does not lock the load or hold position without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-30 |
|---|---|
| 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 SAIJ125X180-30
| 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 SAIJ125X180-30 Is Used
Variable End-Stop Tuning
Dial in the exact retract distance within the 150-180 mm window during machine setup to accommodate different material thicknesses without changing hardware.
Heavy Product Changeover
Rapidly adjust the stroke end-position on production lines handling varying package sizes, leveraging the 6136 N push force to move heavy loads.
Precision Pressing Operations
Fine-tune the pressing depth at commissioning to prevent over-travel, using the rear stopper alongside the 40 mm air cushions to manage impact deceleration.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-30 the Right Cylinder?
Choose this 125 mm bore when your application requires substantial thrust—stepping down to an 80 mm bore reduces push force to 2513 N at 0.5 MPa, while stepping up to a 160 mm bore yields 10053 N. The adjustable stroke is ideal for product changeovers or fine-tuning the retract end-position at setup, avoiding the need to physically swap a fixed-stroke SAI cylinder. To match this ISO 15552 interchangeable profile, specify the 125 mm bore, 180 mm stroke, 30 mm adjustment, PT tapered G1/2 port, and your preferred mounting from the reduced SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or TCM2 (omitting FB, CA, CB, and CR). If your machine requires true load-holding without continuous air pressure, select the SAIL pneumatic lock or BSAI clamp-lock series instead of relying on the rear stopper.
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 SAIJ125X180-30 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel from 180 mm down to as little as 150 mm. This allows precise end-position tuning at commissioning, but it does not hold the load without live air pressure.
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