Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-75S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 270mm 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
- Stroke270 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-75S
The AirTAC SAIJ63X270-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 1559N of pull force at 0.5 MPa. It features a PT tapered port, an M16x1.5 rod thread, and a built-in magnet for position sensing. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
With a 270mm nominal stroke and a 75mm adjustment range, this SKU provides a usable travel window of 195-270mm. This allows you to fine-tune the retract end position at commissioning without swapping the cylinder or adding external stops. The SUS420J2 stainless steel rod (material code A) offers enhanced corrosion resistance, and the adjustable stopper decelerates travel but does not lock the load without live air.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-75S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 270 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 SAIJ63AX270-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×270 | 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 SAIJ63AX270-75S Is Used
Machine Changeover
Dial in the 195-270mm travel window during product size changes without physically swapping cylinders or adding external stopper blocks.
End-Position Tuning
Fine-tune the retract end-stop at commissioning to perfect seating pressure, using the rear screw to absorb mechanical tolerance variations.
Variable Stops
Adjust the stroke length on the fly for sorting or diverting operations on a conveyor line where multiple retract distances are required.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-75S the Right Cylinder?
Choose this 63mm bore when you need higher thrust than a 50mm cylinder (which provides 825N pull at 0.5 MPa) but want a smaller footprint than an 80mm option (2268N pull). The 75mm adjustment window is ideal for product-size changeovers on a line, letting you dial in the exact end-stop mechanically instead of reprogramming fixed SAI cylinder positions. For load-holding without continuous air pressure, pair this cylinder with an external pilot-operated check valve or select an AirTAC SAIL or BSAI model.
Because the 270mm stroke is moderately long, ensure adequate external guiding to prevent excessive side loading on the M16x1.5 piston rod. This SAIJ model uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. It is dimensionally interchangeable per ISO 15552 and supports AirTAC CMSE reed and DMSE electronic sensors.
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 SAIJ63AX270-75S FAQ
At 0.5 MPa operating pressure, this 63mm bore cylinder provides 1559N of pull force and 2182N of push force. At 0.7 MPa, the push force increases to 2182N.
The rear adjuster acts as a mechanical stop that lets you trim the effective stroke back by up to 75mm from the 270mm nominal length, creating a 195-270mm usable travel window. It decelerates the travel end but does not hold the load without live air.
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