Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-40S
The AirTAC SAIJ125 Adjustable Cylinder SAIJ125X145-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 145mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ125 mm
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-40S
The AirTAC SAIJ125X145-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to dial back the nominal 145 mm travel by up to 40 mm. This yields a precise 105-145 mm usable stroke window, perfect for accommodating varied product sizes on a single line without physically swapping the actuator. It features a carbon steel piston rod and a -S magnet for use with CMSE reed and DMSE electronic sensors.
The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. It supports a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and uses PT tapered G1/2 ports.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 145 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 | 5734 N | 5734 N |
| 0.7 MPa | 8027 N | — |
| Max (@1.0 MPa) | 1169 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×145 | 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 SAIJ125X145-40S Is Used
Variable End-Stop Forming
Dial in the exact 105-145 mm forming depth during setup or material changes without adding external stopper blocks to the machine frame.
Multi-Product Changeover
Quickly adapt the retract distance on packaging lines handling different carton sizes by adjusting the rear screw during product transitions.
Sensor-Ready Positioning
Leverage the built-in magnet with DMSE solid-state sensors to track the adjusted travel end while managing heavy 6136 N loads.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-40S the Right Cylinder?
The integrated rear adjuster is chosen over a fixed-stroke SAI when commissioning requires fine end-position tuning or frequent machine changeovers, acting as a mechanical stop to set the retract distance precisely.
Because the stroke is 145 mm, side-load risks are moderate, but an external guide remains advisable for heavy lateral loads. Remember that the rear adjuster and air cushions only decelerate the stroke; they do not hold the load without live air pressure. For fail-safe load holding, consider the SAIL or BSAI series. This configuration is dimensionally interchangeable per ISO 15552 standards.
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 SAIJ125X145-40S FAQ
The rear adjuster acts as a mechanical stop that shortens the effective stroke by up to 40 mm. This gives the 145 mm nominal stroke a usable travel window of 105-145 mm, allowing fine-tuning of the end position at commissioning without replacing the cylinder.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
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