Airtac SAIJ125 Adjustable Cylinder SAIJ125AX25-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX25-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 25mm 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
- Stroke25 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX25-10S
The AirTAC SAIJ125X25-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 15-25 mm from its 25 mm nominal stroke. Delivering 6136 N of push force at 0.5 MPa, it handles heavy loads while allowing fine end-position tuning without external stops. The rod is constructed from SUS420J2 stainless steel for enhanced corrosion resistance.
This model includes a magnet for position sensing with CMSE reed and DMSE electronic switches. The rear adjuster acts purely as a travel stop for commissioning and does not hold the load without live air; for load-holding, consider the SAIL or BSAI series. It features PT tapered port threads and a 30-500 mm/s speed range.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX25-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX25-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 25 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 SAIJ125AX25-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×25 | 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 SAIJ125AX25-10S Is Used
Precision Pressing
Dial in the exact 15-25 mm travel during machine commissioning to apply precise pressing force without swapping cylinders.
Product Changeover
Quickly adjust the end-stop for varying part sizes on a production line, utilizing the 10 mm trim range.
Heavy Assembly
Leverage the 6136 N push force to move heavy components into final position while fine-tuning the stroke.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX25-10S the Right Cylinder?
Choose this 125 mm bore when substantial thrust is required in a compact footprint, stepping down to the 100 mm bore (3927 N push at 0.5 MPa) if force requirements are lower. The adjustable stroke is selected over a fixed SAI cylinder when machine setups require variable end-stops or fine-tuning during product changeover. For load-holding without continuous air pressure, integrate an external pilot-operated check valve or switch to the SAIL lock series.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 25 mm stroke, 10 mm adjustment, PT port threads, and -S magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Despite the short 25 mm stroke, the 32 mm rod diameter provides high rigidity, though any lateral loads should still be managed with an external guide.
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 SAIJ125AX25-10S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force.
The rear adjuster allows you to shorten the 25 mm nominal stroke by up to 10 mm, creating a 15-25 mm usable travel window for fine-tuning end positions.
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Standard models usually ship in 3-4 days.
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