Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-75
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 240mm 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
- Stroke240 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-75
The AirTAC SAIJ63X240-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to fine-tune the retract end-position. With a nominal 240 mm stroke and a 75 mm adjustment range, it provides a wide usable travel window of 165 to 240 mm, letting you dial in the exact stop distance during machine commissioning without swapping hardware. The 63 mm bore delivers 1559 N of pull force at 0.5 MPa and 2182 N of push force at 0.7 MPa, making it well-suited for moderate-load positioning tasks.
This SKU is configured with an SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance compared to standard carbon steel. It uses PT tapered ports sized at G3/8 and lacks a standard magnet, meaning position sensing via CMSE reed or DMSE electronic sensors is not available out of the box. The extruded aluminum barrel includes sensor grooves on both sides for standard ISO 15552 accessories, and the rear adjuster acts purely as a mechanical stop—it does not lock or hold the load without continuous live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-75 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 240 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 SAIJ63AX240-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×240 | 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 SAIJ63AX240-75 Is Used
Machine Changeover
Quickly reset the retract distance from 165 to 240 mm when switching between product sizes on a packaging line, using the rear screw to set a new end-stop without disassembling the cylinder.
End-Position Tuning
Fine-tune the exact stopping point during initial commissioning to achieve precise mechanical alignment, absorbing minor variances in the fixture setup.
Variable Stroke Ejector
Adjust the ejection length on an assembly station to accommodate parts of varying heights, relying on the 1559 N pull force to retract the rod reliably.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-75 the Right Cylinder?
Select this 63 mm bore cylinder when your application requires an exact retract position that falls somewhere between 165 and 240 mm, saving you the cost of ordering a custom-length standard SAI cylinder. If you need less force, stepping down to a 50 mm bore drops the 0.5 MPa pull force to 825 N, while moving up to an 80 mm bore increases the 0.5 MPa pull force to 2268 N for heavier loads. Because this model features a 240 mm stroke, which is below the 300 mm side-load threshold, external guiding is less critical than on longer strokes, though the 20 mm rod thread and 20 mm rod diameter still handle lateral loads better than smaller variants.
The adjustable rear stopper is ideal for product changeovers on a production line where the end-stop distance varies by batch, but remember it is not a locking mechanism. For applications that require true load-holding without live air pressure, you must use an external rod lock, a pilot-operated check valve, or switch to an AirTAC SAIL (air-released lock) or BSAI (clamp-lock) cylinder. To replace an existing ISO 15552 cylinder, verify the 63 mm bore, 240 mm nominal stroke, 75 mm adjustment range, G3/8 PT ports, and the preferred mounting style from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, 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 SAIJ63AX240-75 FAQ
The rear adjuster screw lets you shorten the effective stroke by up to 75 mm. This creates a usable travel window between 165 mm and 240 mm, allowing you to set the exact retract end-position at commissioning without adding external stops.
At a 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of pull force and 1402 N of push force. At 0.7 MPa, the push force increases to 2182 N.
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