Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 140mm 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
- Stroke140 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-20
The AirTAC SAIJ63X140-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 120-140 mm usable travel window, allowing you to dial back the standard 140 mm stroke by up to 20 mm during commissioning. Delivering 1559 N of push force and 1402 N of pull force at 0.5 MPa, it handles mid-range automation tasks with precision.
This unit is built with a SUS420J2 stainless steel rod for enhanced corrosion resistance and uses PT tapered port threads (G3/8). The extruded aluminum barrel includes sensor grooves on both sides. The rear adjuster acts strictly as a mechanical stop to fine-tune the end position; it does not hold the load without live air pressure, so a SAIL or BSAI lock is required for dead-stop holding.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 140 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 SAIJ63AX140-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×140 | 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 SAIJ63AX140-20 Is Used
Machine Changeover
Dial in the 120-140 mm travel window during product size changes without physically replacing the cylinder or reworking external hard stops.
End-Stop Tuning
Fine-tune the retract end position at commissioning to perfect a pressing or spotting operation, compensating for mechanical tolerance stack-up.
Diverter Positioning
Adjust the actuation length on the fly for a conveyor diverter arm to accommodate different package sizes on the same production line.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-20 the Right Cylinder?
Choose this 63 mm bore when a 50 mm cylinder (982 N push at 0.5 MPa) lacks thrust but an 80 mm bore (2513 N) is excessive. The adjustable stroke is ideal for product-size changeovers, letting you shift the end position without swapping the cylinder or adding external stops. To match this ISO 15552 replacement, specify the 140 mm nominal stroke, 20 mm adjustment range, PT G3/8 port, SUS420J2 (A) rod material, and your required mounting from the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, or TCM2.
With a 140 mm stroke, the 20 mm diameter rod carries moderate side loads, but you should still guide the load externally to prevent binding. The cylinder operates at speeds of 30-800 mm/s. Without a -S magnet, it cannot host CMSE or DMSE sensors; add the -S option if position feedback is needed.
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 SAIJ63AX140-20 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 318 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 140 mm nominal stroke by up to 20 mm, creating a 120-140 mm usable travel window. It only sets the end position and deceleration; it does not lock or hold the load without live air pressure.
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