Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-40
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 145mm 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
- Stroke145 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-40
The AirTAC SAIJ63X145-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 105 to 145 mm, allowing you to dial back the nominal 145 mm stroke by up to 40 mm during commissioning without swapping out the unit. Delivering a pull force of 1402 N at 0.5 MPa, it fits perfectly into mid-range pneumatic setups requiring precise end-position tuning.
This variant uses a SUS420J2 stainless steel rod (option A) for enhanced durability against moisture and minor splash. It features PT tapered port threads (G3/8) and dual-sided sensor grooves on the extruded aluminum barrel. Note that the rear adjuster acts purely as a mechanical stop to set the retract end; it does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-40 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 145 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 SAIJ63AX145-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | 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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-40 Is Used
End-Position Tuning
Dial in the exact retract distance within the 105-145 mm window during machine commissioning to perfect product handling without adding external stopper blocks.
Product Changeovers
Quickly adapt the cylinder's travel end on the fly to accommodate different package sizes or part lengths running down the same conveyor line.
Assembly Station Setup
Leverage the 1559 N push force at 0.5 MPa to press components, using the 40 mm adjustment to compensate for varying material thicknesses on the fly.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-40 the Right Cylinder?
Choose this 63 mm bore when your application requires a pull force around 1402 N at 0.5 MPa, bridging the gap between the 50 mm bore (825 N pull) and the 80 mm bore (2268 N pull). An adjustable stroke is selected over a fixed SAI model when you need variable end-stops for product size changeovers or fine-tuning at machine setup. To match this ISO 15552 interchangeable cylinder, specify: 63 mm bore, 145 mm stroke, 40 mm adjustment, PT G3/8 port, no magnet, and SUS420J2 rod material.
Because the stroke is under 300 mm, side-load stress on the 20 mm rod and M16x1.5 rod thread is moderate, but an external guide is still recommended for heavy lateral loads. For applications that must hold a position mechanically without continuous air pressure, consider the SAIL (air-released lock) or BSAI (clamp-lock) series instead, as the SAIJ adjuster is not a brake.
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 SAIJ63AX145-40 FAQ
The rear adjuster screw lets you mechanically shorten the stroke by up to 40 mm. This creates a usable travel window of 105 to 145 mm, allowing you to fine-tune the end position at commissioning without replacing the cylinder.
At 0.5 MPa operating pressure, it generates a push force of 1559 N and a pull force of 1402 N. At 0.7 MPa, the push force increases to 2182 N.
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