Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX180-40
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX180-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 180mm 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
- Stroke180 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX180-40
The AirTAC SAIJ63X180-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to trim the effective travel by up to 40 mm. This creates a highly flexible 140-180 mm usable stroke window, letting you dial in the exact retract end-position during commissioning without swapping out the actuator. Equipped with a G3/8 port and a 20 mm piston rod, it delivers 1559 N of pull force at 0.5 MPa.
This specific configuration utilizes an SUS420J2 stainless steel rod (material code A) for superior corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides for straightforward switch mounting, while the adjustable stopper functions purely as a travel end-limit and does not hold the load without continuous live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX180-40 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX180-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 180 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 SAIJ63AX180-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×180 | 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 SAIJ63AX180-40 Is Used
Machine Changeover
Quickly adapt the retract distance by up to 40 mm when switching between product sizes on a packaging line, avoiding physical cylinder swaps.
End-Position Calibration
Fine-tune the exact 140-180 mm travel limit during initial commissioning to perfect seating or clamping pressure against a workpiece.
Variable End Stops
Provide a built-in mechanical stop for assemblies that require periodic stroke adjustments based on varying material thicknesses.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX180-40 the Right Cylinder?
Select this 63 mm bore actuator when an application demands precise retract positioning within a 140-180 mm window, avoiding the need to fabricate external mechanical stops. If your setup requires less force, stepping down to a 50 mm bore yields 825 N of pull at 0.5 MPa; conversely, an 80 mm bore provides 2268 N for heavier payloads. Because the nominal stroke is 180 mm, side-load stress is moderate, but always ensure the load is guided to prevent rod binding.
For a seamless ISO 15552 replacement, match the 63 mm bore, 180 mm stroke, 40 mm adjustment range, PT tapered port threads, and the SUS420J2 rod material. Note that this model lacks a magnet (-S), so position sensing via CMSE or DMSE switches is not possible without a different configuration. If the machine requires true load-holding without air pressure, an external rod lock or a related SAIL pneumatic-lock cylinder is necessary, 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 SAIJ63AX180-40 FAQ
At 0.5 MPa, this 63 mm bore cylinder provides 1559 N of pull force and 2182 N at 0.7 MPa. The operational speed range is 30-800 mm/s.
A rear adjusting screw acts as a mechanical stopper, allowing you to shorten the nominal 180 mm stroke down to 140 mm. It sets the travel limit but does not lock the load without live air pressure.
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