Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-30S
The AirTAC 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 a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-30S
The AirTAC SAIJ125X145-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 8590N of push force at 0.7 MPa. 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 | 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 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.
Heavy Fixture Clamping
Leverage the 8590N push force at 0.7 MPa to secure heavy workpieces, relying on the 32mm rod to handle substantial clamping loads.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-30S the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder (providing 3518N push at 0.7 MPa) lacks the thrust for heavier fixtures, but a 160mm bore (14074N) is physically oversized. 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
At 0.7 MPa operating pressure, this 125mm bore cylinder provides 8590N of push force and 5734N of pull force. 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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