Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 375mm 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
- Stroke375 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-30S
The AirTAC SAIJ125X375-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N push force at 0.5MPa. Its built-in 30mm adjustment screw creates a 345-375mm usable travel window, allowing precise end-position tuning during commissioning without swapping hardware. A PT tapered port and SUS420J2 stainless steel rod provide robust fluid sealing and high side-load resilience.
Because this 375mm stroke exceeds typical compact lengths, an external guide is recommended to prevent rod bending under heavy loads. The included magnet (-S) directly supports AirTAC CMSE reed and DMSE electronic sensors, while the mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 375 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 SAIJ125AX375-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×375 | 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 SAIJ125AX375-30S Is Used
Product Changeovers
Dial in the 345-375mm stroke window instantly on the rear screw when switching between different package lengths on a packaging line.
Machine Setup
Fine-tune the end-of-stroke position during initial commissioning without machining new spacer blocks or swapping the cylinder.
Variable End Stops
Handle multiple pressing depths on a single assembly station using the 30mm adjustment range and 6136N of thrust.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-30S the Right Cylinder?
Choose this 125mm bore when a 100mm cylinder lacks thrust (delivering only 3927N push at 0.5MPa) or when a 160mm unit is unnecessarily bulky. The adjustable 345-375mm travel window is ideal for production lines running variable product sizes, enabling rapid changeovers via the rear stopper screw instead of adding external stops. For a fixed end-position, a standard SAI cylinder is simpler.
Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true pneumatic locking, consider the SAIL or BSAI series. To match this ISO 15552 interchangeable cylinder exactly, specify the 125mm bore, 375mm stroke, 30mm adjustment, PT port, SUS420J2 rod, and -S magnet.
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 SAIJ125AX375-30S FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9MPa.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective travel from the nominal 375mm down to 345mm. It only sets the end position and does not lock the load without live air pressure.
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