Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-40S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-40S 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 SAIJ63AX270-40S
The AirTAC SAIJ63X270-40-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 1559N pull force at 0.5 MPa and uses a PT tapered G3/8 port. The built-in rear stopper allows you to trim the effective travel back by up to 40 mm, creating a 230-270 mm usable stroke window for precise end-position tuning during commissioning without swapping the cylinder.
This variant includes a magnet for position sensing with AirTAC CMSE reed or DMSE electronic switches. It features a SUS420J2 stainless steel rod for corrosion resistance and uses variable air cushions at both ends. The adjuster acts solely as a travel stop to set deceleration; it does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-40S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-40S |
|---|---|
| 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 SAIJ63AX270-40S
| 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 SAIJ63AX270-40S Is Used
Machine Changeover
Dial in the 230-270mm travel window during product size changes to set new end positions rapidly without replacing the cylinder.
Assembly Positioning
Fine-tune the exact retracted end-stop during commissioning to perfect part placement using the rear adjustment screw.
Conveyor Diverter
Adjust the stroke on the fly to accommodate varying package lengths on a single pneumatic diverter mechanism.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-40S the Right Cylinder?
Choose this 63mm bore when you need higher force than the 50mm version (982N pull at 0.5 MPa) but less bulk than the 80mm bore (2268N pull). An adjustable stroke is ideal for product changeovers on a line, allowing you to fine-tune the end stop on the fly rather than machining external stops or buying a fixed-stroke SAI cylinder. Because the total stroke is 270mm, an external guide is recommended to manage side-load on the extended rod.
For ISO 15552 dimensional replacement, match the 63mm bore, 270mm nominal stroke, 40mm adjustment range, PT port thread, and -S magnet. SAIJ supports a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. If your application requires true load-holding without live air, use a SAIL or BSAI cylinder instead of relying on this adjuster.
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 SAIJ63AX270-40S FAQ
At 0.5 MPa it delivers 1559N push and 1402N pull force. At 0.7 MPa it delivers 2182N push and 1962N pull force.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 270mm nominal stroke by up to 40mm, yielding a 230-270mm usable travel window. It sets the end position but does not lock the load.
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