Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-100
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 125mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ63 mm
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-100
The AirTAC SAIJ63X125-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to trim the nominal 125 mm travel back by up to 100 mm. This yields a highly flexible usable travel window of 25 to 125 mm, letting you dial in exact end positions during commissioning without swapping out the unit. It delivers a robust 1402 N pull force at 0.5 MPa, making it suitable for moderate-to-heavy positioning tasks.
This variant is configured with a SUS420J2 stainless steel piston rod (code A) for enhanced corrosion resistance, along with PT tapered port threads for a reliable pneumatic seal. The extruded aluminum barrel includes sensor grooves on both sides, and while this specific SKU omits the magnet, adding one enables compatibility with AirTAC CMSE reed and DMSE electronic solid-state sensors.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-100 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 36 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×125 | 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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-100 Is Used
Product Changeover
Quickly adjust the 25-125 mm stroke window during product size changeovers without replacing the cylinder or adding external mechanical stops.
Machine Setup
Fine-tune the exact retract end-position during initial machine commissioning to achieve precise alignment before locking down the controller.
Variable End Stops
Ideal for assembly lines where the rear stopper must be frequently dialed back to accommodate different part lengths on the same fixture.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-100 the Right Cylinder?
Choose this 63 mm bore over the smaller 50 mm option when you need more force, as the 50 mm bore yields only 825 N pull at 0.5 MPa compared to this model's 1402 N. The 100 mm adjustment range is ideal for machines that process varying product sizes, allowing you to reposition the retract stop on the fly instead of installing fixed external stops. For strokes of 125 mm, side-load is minimal, but always ensure the M16x1.5 rod thread is properly aligned.
Because this is a double-acting cylinder, the rear adjuster functions strictly as a travel stop, not a lock. It will not hold a load in place without live air pressure. If your application requires fail-safe load holding, consider the AirTAC SAIL series with an air-released lock or an external rod lock. This model is dimensionally interchangeable per ISO 15552, uses a G3/8 port, and supports a mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-100 FAQ
At a standard 0.5 MPa operating pressure, the 63 mm bore provides 1559 N of push force and 1402 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 318 kgf.
The rear adjuster screw lets you shorten the 125 mm nominal stroke by up to 100 mm, creating a usable travel window of 25 to 125 mm. It acts as a physical stop to set the retract position and is not a lock, meaning live air pressure is still required to hold the load.
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