Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-50S 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 SAIJ63AX140-50S
The AirTAC SAIJ63X140-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 140 mm nominal stroke that can be dialed back by up to 50 mm, providing a usable travel window of 90 to 140 mm. This allows you to fine-tune the retract end position at commissioning without swapping the cylinder or adding external stops. The 63 mm bore delivers 1559 N of pull force and 2182 N of push force at 0.7 MPa.
This SKU includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors, which seat neatly into the sensor grooves on both sides of the extruded aluminum barrel. It is supplied with an SUS420J2 stainless steel rod (code A) for improved corrosion resistance, PT tapered port threads, and a G3/8 air port. The variable air cushions at both ends work alongside the rear stopper to decelerate the load, though neither acts as a lock to hold position without live air.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-50S |
|---|---|
| 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 SAIJ63AX140-50S
| 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 SAIJ63AX140-50S Is Used
Product Changeover
Dial in the 90-140 mm travel window during format size changes on a packaging line without replacing hardware.
End-Stop Tuning
Fine-tune the retract position during machine commissioning to perfectly align tooling without external shims.
Variable Positioning
Set precise retraction limits for assembly presses that need to accommodate multiple part heights.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-50S the Right Cylinder?
Choose this 63 mm bore when an application requires around 1559 N of pull force at 0.5 MPa; stepping down to a 50 mm bore reduces that to 825 N, while an 80 mm bore increases it to 2268 N. The 50 mm adjustment range is ideal for machines handling frequent product-size changeovers, allowing operators to set variable end-stops on the fly instead of machining fixed stops. For load-holding without continuous air pressure, this cylinder is not suitable—consider the SAIL (air-released lock) or BSAI (clamp-lock) variants instead. As a dimensionally interchangeable ISO 15552 cylinder, it matches standard bore, stroke, port, and mounting dimensions.
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 SAIJ63AX140-50S FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke by up to 50 mm. This creates a usable travel window of 90 to 140 mm, allowing you to fine-tune the retract end position without changing the cylinder.
At 0.5 MPa, it provides 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N. The cylinder operates at speeds between 30 and 800 mm/s.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-50S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.