Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-75
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 135mm 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
- Stroke135 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-75
The AirTAC SAIJ63X135-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 135 mm stroke that can be dialed back by up to 75 mm, yielding a highly flexible 60-135 mm usable travel window for precise end-position tuning. Delivering 1559 N of push force at 0.5 MPa, it handles robust actuation tasks while maintaining standard ISO 15552 mounting dimensions.
This specific SKU is configured with a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and features PT tapered port threads with a G3/8 port size. The extruded aluminum barrel includes sensor grooves on both sides, though this unit is supplied without a magnet. The rear adjuster acts purely as a mechanical stop to set the travel end and does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-75 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 135 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 SAIJ63AX135-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×135 | 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 SAIJ63AX135-75 Is Used
Machine Changeover
Dial in the 60-135 mm travel window during product size transitions without swapping out the entire cylinder or adding external shims.
End-Position Tuning
Fine-tune the retract end-stop during commissioning to achieve exact positioning, absorbing mechanical tolerances in the fixture.
Variable Stroke Diverters
Adjust the retract distance on the fly for pneumatic diverters that must handle differently sized packages on a single line.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-75 the Right Cylinder?
Choose this 63 mm bore cylinder when an application requires a 1559 N push force at 0.5 MPa but involves variable product sizes or frequent changeovers, making a fixed 135 mm SAI cylinder impractical. If your thrust requirements are lower, stepping down to a 50 mm bore yields 982 N, while moving up to an 80 mm bore provides 2513 N. Because this model features a 135 mm stroke, it does not strictly require external guide support, but the 20 mm rod diameter should still be factored into side-load calculations.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 135 mm stroke, 75 mm adjustment range, PT G3/8 port, and SUS420J2 rod material. Note that SAIJ supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. For applications requiring the load to be held without continuous air pressure, a standard SAIJ is insufficient; consider an AirTAC SAIL or BSAI locking cylinder instead.
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 SAIJ63AX135-75 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder generates 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 acts as a mechanical stop, allowing you to shorten the effective travel from the 135 mm nominal stroke down to as little as 60 mm. It only sets the end position and does not lock the load without live air.
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