Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-30S
The AirTAC SAIJ125 Adjustable Cylinder SAIJ125X145-30S 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 SAIJ125X145-30S
Its 145mm nominal stroke can be dialed back by up to 30mm, creating a precise 115-145mm usable travel window for fine-tuning end positions without adding external stops. The extruded aluminum barrel features sensor grooves on both sides, and the integrated -S magnet operates directly with AirTAC CMSE reed and DMSE electronic switches.
This model utilizes a robust 32mm carbon steel rod with an M27x2 thread, paired with 40mm variable air cushions at both ends to manage high kinetic energy. The rear adjuster functions strictly as a mechanical stop to set the retract position; it does not lock the load, so maintaining position without live air requires a SAIL or BSAI variant. Operating speed ranges from 30-500mm/s.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-30S |
|---|---|
| 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 SAIJ125X145-30S
| 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 SAIJ125X145-30S Is Used
Product Changeover
Dial in the 115-145mm travel window during format size changes on a packaging line without physically swapping the cylinder.
End-Stop Tuning
Fine-tune the retract position during machine commissioning using the rear screw, avoiding the need to bolt on external mechanical stops.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-30S the Right Cylinder?
The 30mm adjustment range is ideal for product changeovers on a packaging line, allowing operators to dial in the exact 115-145mm travel window at commissioning rather than swapping out a fixed-stroke SAI cylinder. To match this ISO 15552 footprint exactly, specify the 125mm bore, 145mm stroke, PT tapered port, and the -S magnet option.
With a 145mm stroke, side loads are moderate, but the 32mm rod and M27x2 thread provide excellent rigidity. For any application approaching the 300mm stroke threshold, an external guide is recommended to prevent rod binding.
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 SAIJ125X145-30S FAQ
It can safely operate up to a maximum pressure of 1.0 MPa.
The rear adjuster acts as a mechanical stop that shortens the 145mm nominal stroke by up to 30mm, creating a usable travel window of 115-145mm. It sets the end position but does not hold the load without live air pressure.
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Genuine AirTAC parts produced by AirTAC factory.
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.
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