Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 230mm 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
- Stroke230 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-20
The AirTAC SAIJ125X230-20 is a double-acting ISO 15552 profile cylinder equipped with a rear mechanical stroke adjuster. It provides a 210-230 mm usable travel window, allowing you to dial back the 230 mm nominal stroke by up to 20 mm during commissioning. This bore size delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks.
The integrated adjuster functions purely as an external stop to set the retract end-position and must not be mistaken for a locking mechanism. It uses a PT tapered port and a robust 32 mm carbon steel rod with an M27x2 thread to handle high side loads. For position feedback, the extruded aluminum barrel features dual-sided sensor grooves that accept electronic DMSE or reed CMSE switches, though this specific SKU is configured without a magnet.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 230 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 SAIJ125X230-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×230 | 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 SAIJ125X230-20 Is Used
Machine Changeover
Fine-tune the 210-230 mm retract window on the fly during product size transitions without physically swapping the cylinder or bolting on new external stops.
Heavy Pressing
Leverage the 6136 N push force at 0.5 MPa to seat heavy components, using the rear stopper to dial in the exact end-position for consistent assembly depth.
End-Stop Calibration
Set precise variable end-stops during initial commissioning, relying on the 32 mm carbon steel rod and M27x2 thread to maintain rigidity under heavy loads.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-20 the Right Cylinder?
Choose this 125 mm bore adjustable cylinder when your application requires precise retract end-position tuning without adding external stops. If your setup needs less force, stepping down to an 80 mm bore yields 2513 N of push force at 0.5 MPa. For higher dynamics, a 100 mm bore provides 3927 N. The SAIJ series is dimensionally interchangeable with ISO 15552 cylinders, so you can match the 125 mm bore, 230 mm stroke, PT port, and mounting footprint directly.
Because the 230 mm stroke exceeds 300 mm? No, but even at 230 mm, long unsupported loads should use an external guide to prevent rod bending. Remember that the rear adjuster is a travel stop, not a brake. If your machine requires true load-holding without live air pressure, select the SAIL (air-released lock) or BSAI (clamp-lock) series instead. Available mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125X230-20 FAQ
The rear adjuster acts as a mechanical stopper that lets you trim the effective travel back by up to 20 mm. This creates a 210-230 mm usable stroke window, enabling exact end-position tuning at commissioning without changing the cylinder's physical mounting.
At 0.5 MPa operating pressure, it provides 6136 N of push force and 5734 N of pull force. If you increase pressure to 0.7 MPa, the push force rises to 8590 N. Note that the adjuster only sets the travel end and does not hold the load without live air.
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