Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 225mm 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
- Stroke225 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-10
The AirTAC SAIJ125X225-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 215-225 mm usable travel window, allowing you to trim the nominal 225 mm stroke by up to 10 mm. This bore delivers 6136 N of push force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks.
This variant features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance. It uses a PT tapered port thread and operates at speeds of 30-500 mm/s. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU omits the magnet for position sensing.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 225 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 SAIJ125AX225-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×225 | 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 SAIJ125AX225-10 Is Used
Machine Changeover
Dial in the exact 215-225 mm retract stop during product size changes on a packaging line without adding external shims.
Heavy Positioning
Leverage 6136 N of thrust at 0.5 MPa to move heavy pallets or fixtures, using the adjuster to fine-tune the end stop.
Commissioning Setup
Trim up to 10 mm off the nominal stroke during initial commissioning to perfectly align tooling without remounting the cylinder.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-10 the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (offering 3927 N at 0.5 MPa) lacks sufficient thrust, but a 160 mm bore is unnecessary. The 10 mm adjustment range is ideal for fine-tuning the retract end-position during machine setup or product changeover without swapping the entire cylinder. Unlike a fixed-stroke SAI, this model lets you dial in the exact travel limit on the fly.
When matching ISO 15552 dimensions for a direct replacement, verify the 125 mm bore, 225 mm stroke, 10 mm adjustment range, PT G1/2 port, and the correct mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, consider an external rod lock or the SAIL/BSAI series.
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 SAIJ125AX225-10 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 can deliver up to 1251 kgf.
The rear adjusting screw acts as a mechanical stopper that lets you shorten the effective stroke by up to 10 mm, creating a 215-225 mm usable travel window. It is a stop only, not a lock, so it cannot hold the load without continuous air pressure.
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