Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 45mm 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
- Stroke45 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-30
The AirTAC SAIJ125X45-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 15-45 mm usable travel window by trimming up to 30 mm from the 45 mm nominal stroke. Belonging to the 125 mm bore class, it outputs 6136 N push and 5734 N pull force at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides for straightforward position detection.
This model uses a PT tapered port thread and a robust 32 mm carbon steel rod with an M27x2 thread. The rear adjustment screw acts purely as a travel stop for fine-tuning end positions during commissioning. It is not a locking mechanism, so the cylinder cannot hold a load without live air pressure. For operations requiring genuine load-holding without continuous air, consider the related SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 45 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 SAIJ125X45-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×45 | 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 SAIJ125X45-30 Is Used
Changeover Tuning
Dial in the exact 15-45 mm end-stop during machine changeovers to accommodate different product sizes without replacing the actuator.
High-Force Clamping
Leverage the 6136 N push force at 0.5 MPa to secure heavy workpieces, using the rear screw to fine-tune the clamping depth precisely.
Short-Stroke Pressing
Execute compact pressing operations where a robust 125 mm bore is required, but the actual travel distance must be dialed back to 15 mm.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-30 the Right Cylinder?
Choose this 125 mm bore if you need substantial thrust—6136 N at 0.5 MPa—paired with a very short, highly adjustable travel window. Stepping down to an 80 mm bore reduces push force to 2513 N, while moving up to a 160 mm bore yields 10053 N. The SAIJ125X45-30 is selected over a fixed-stroke SAI when a machine requires exact end-position tuning at setup or during product changeovers without swapping cylinders or adding external stops.
As an ISO 15552 interchangeable cylinder, it matches standard mounting dimensions and accepts a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). It operates at 30-500 mm/s. Because the 45 mm stroke is short, side-load stress on the 32 mm rod is minimal, but an external guide is still recommended for heavy lateral loads.
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 SAIJ125X45-30 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 0.9 MPa, the push force increases to 11045 N.
The rear adjuster screw allows you to shorten the 45 mm nominal stroke by up to 30 mm, creating a 15-45 mm usable travel window. This stopper only sets the end position and decelerates the piston; it does not lock or hold the load without continuous air pressure.
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