Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-50 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 SAIJ63AX145-50
The AirTAC SAIJ63X145-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 50 mm. This creates a precise 95-145 mm usable stroke window, letting you dial in the retract end-position at commissioning without swapping out the physical cylinder. It delivers 1559 N of pull force at 0.5 MPa and uses a G3/8 port for optimal flow.
This variant is built with an SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU is configured without a magnet. You can fine-tune the end-stop using the rear screw, but remember it acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-50 |
|---|---|
| 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 SAIJ63AX145-50
| 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 SAIJ63AX145-50 Is Used
Machine Changeover
Quickly reconfigure the 95-145 mm travel window during product size changes on a packaging line without replacing the cylinder.
End-Position Tuning
Fine-tune the retract stop during commissioning to achieve exact seating forces without adding bulky external stopper hardware.
Variable End Stops
Adapt clamping or ejection depths on the fly for flexible manufacturing cells using the 50 mm rear adjustment screw.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-50 the Right Cylinder?
Choose this 63 mm bore when your application requires the 1559 N pull force (at 0.5 MPa) of a mid-size cylinder but demands variable end-stops for product changeovers. If you need less force, stepping down to a 50 mm bore yields 825 N of pull force, while stepping up to an 80 mm bore provides 2268 N. The adjustable rear stopper is ideal for tuning a 95-145 mm travel window on the fly, avoiding the need to bolt on external stops or purchase multiple fixed-stroke SAI cylinders.
When integrating this ISO 15552 interchangeable cylinder, note the PT tapered port thread and the SUS420J2 rod material. Because the nominal stroke is 145 mm, side-load stress is manageable, but always ensure external guiding for heavy loads. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR brackets. For applications requiring true load-holding without continuous air pressure, consider an AirTAC SAIL or BSAI 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 SAIJ63AX145-50 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of pull force and 1559 N of push force. At 0.7 MPa, the push force increases to 2182 N.
The rear adjuster screw lets you shorten the 145 mm nominal stroke by up to 50 mm, providing a usable travel window of 95 to 145 mm. It acts as a mechanical stop to set the end position and is not a locking device.
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