Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-75S
The AirTAC SAIJ125X350-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 275 to 350 mm usable travel window. Delivering 6136 N of push force at 0.5 MPa, it handles heavy positioning tasks. The PT tapered port threads and carbon steel rod ensure durable, high-pressure operation.
Because the rear stopper acts only as a travel end and deceleration aid, it will not hold the load without live air. For position holding, consider SAIL or BSAI models. This unit includes a magnet for CMSE reed and DMSE electronic sensors, and uses the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 350 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 SAIJ125X350-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×350 | 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 SAIJ125X350-75S Is Used
Variable End-Stop Tuning
Dial in the exact 275 to 350 mm end position during machine setup to accommodate varying product lengths without physically replacing the actuator.
Heavy Product Changeover
Leverage the 6136 N thrust at 0.5 MPa to shift heavy pallets or assemblies, adjusting the stroke on the fly for different package sizes on the same line.
Press Positioning
Use the fine rear screw adjustment to set precise lower limits for pressing or forming operations, ensuring repeatable depth without mechanical shims.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-75S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (3927 N at 0.5 MPa) lacks the thrust for moving heavy fixtures during product changeovers. The 75 mm adjustment window lets you fine-tune the end position at commissioning without swapping the cylinder or adding external stops. For load-holding without live pressure, use an external pilot-operated check valve or switch to a SAIL lock cylinder.
This SKU matches: 125 mm bore, 350 mm nominal stroke, 75 mm adjustment, PT ports, carbon steel rod, -S magnet, and Basic/FA/LB/TC/FTC/TCM1/TCM2 mounts. Since the 350 mm stroke is long, the 32 mm rod and M27x2 thread still require an external guide to prevent side-load damage.
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 SAIJ125X350-75S 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 lets you shorten the effective travel from the nominal 350 mm down to 275 mm. This stopper only sets the travel end and does not lock the load without live air.
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Standard models usually ship in 3-4 days.
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