Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-20S 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 SAIJ63AX140-20S
The AirTAC SAIJ63X140-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 120-140 mm for precise end-position tuning. It delivers a 1559 N pull force at 0.5 MPa and features a SUS420J2 stainless steel rod (option A) paired with PT tapered ports. An integrated magnet enables position sensing with CMSE reed or DMSE electronic switches.
This adjustable model allows you to fine-tune the retract end position at commissioning without adding external stops or swapping the cylinder. It uses a reduced mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options. The rear adjuster functions strictly as a travel stop to decelerate the stroke, not as a lock, meaning it will not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-20S |
|---|---|
| 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 SAIJ63AX140-20S
| 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 SAIJ63AX140-20S Is Used
Changeover Calibration
Dial in the exact retract position within the 120-140 mm window during machine changeovers without replacing the cylinder or bolting on external stops.
Variable End-Stop Forming
Set precise end-of-stroke limits for pressing or forming tasks that require slight positional tweaks based on material thickness.
Sensor-Ready Gaging
Leverage the integrated magnet and dual sensor grooves to confirm position with CMSE or DMSE switches while adjusting the travel end.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-20S the Right Cylinder?
Choose this 63 mm bore when your application requires the 1559 N pull force at 0.5 MPa and a variable end-stop within a 120-140 mm window. If you need less force, stepping down to a 50 mm bore yields 825 N pull, while stepping up to an 80 mm bore provides 2268 N. The 20 mm adjustment range is ideal for product-size changeovers on a line, offering more flexibility than a fixed-stroke SAI cylinder.
For load-holding without live pressure, this plain SAIJ cylinder is insufficient since the rear adjuster and air cushions only set travel ends, so you should look to the SAIL or BSAI series. As a direct ISO 15552 replacement, match the 63 mm bore, 140 mm stroke, 20 mm adjustment, G3/8 port, and the -S magnet requirement. The 140 mm stroke is short enough to avoid rod sag, but long unsupported strokes still need an external guide to prevent side-loading damage.
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 SAIJ63AX140-20S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of pull force and 2182 N of push force. It can reach a maximum push force of 2805 N at 0.9 MPa.
The rear adjuster acts as an external stopper 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 travel end and decelerates the stroke; it does not lock or hold the load without continuous air pressure.
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