Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-75
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-75 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 SAIJ63AX140-75
The AirTAC SAIJ63X140-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 65 to 140 mm, allowing you to dial back the nominal 140 mm stroke by up to 75 mm during commissioning. This bore size delivers 1559 N of pull force at 0.5 MPa and 2182 N of push force at 0.7 MPa, making it well-suited for moderate-load manipulation tasks.
This specific SKU is configured with an SUS420J2 stainless steel piston rod (option A) for enhanced corrosion resistance compared to standard carbon steel. The pneumatic supply connects via a PT tapered G3/8 port. It retains the extruded aluminum profile barrel with sensor grooves on both sides, though position detection requires adding a magnet (designated by a -S suffix) to properly trigger CMSE reed or DMSE electronic switches.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-75 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-75 |
|---|---|
| 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 SAIJ63AX140-75
| 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 SAIJ63AX140-75 Is Used
Changeover Tuning
Dial in the exact end-position from 65 to 140 mm during machine setup, accommodating different product lengths without physically swapping the actuator.
Variable End Stops
Establish precise mechanical stops for sub-assembly pressing or forming tasks, relying on the 2182 N push force at 0.7 MPa to move moderate workpieces.
Multi-Format Lines
Adapt packaging or handling conveyors to various carton sizes quickly by adjusting the rear stopper screw, reducing mechanical retrofit downtime.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-75 the Right Cylinder?
Choose this 63 mm bore adjustable cylinder when your application requires variable end-stops for product size changeovers, delivering 1559 N pull force at 0.5 MPa. If your process needs less force, stepping down to a 50 mm bore yields 825 N of pull force, while upgrading to an 80 mm bore provides 2268 N for heavier payloads. The rear adjuster acts solely as a mechanical stop to fine-tune travel; it does not hold the load without live air pressure. For fail-safe load holding, consider the SAIL or BSAI series instead.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 140 mm stroke, 75 mm adjustment range, PT G3/8 port, and the required mounting accessory. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets. The 20 mm rod diameter and M16x1.5 thread handle standard side loads well, though external guidance is recommended for unsupported loads.
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 SAIJ63AX140-75 FAQ
A rear-mounted adjusting screw acts as an external stopper, allowing you to shorten the effective travel from 140 mm down to a minimum of 65 mm. This provides a 75 mm adjustment window for fine-tuning the retract end position at commissioning without adding external stops.
At 0.5 MPa, it generates 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N, and it reaches a maximum push force of 2805 N at 0.9 MPa.
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