Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-75S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-75S 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 SAIJ63AX140-75S
The AirTAC SAIJ63X140-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 65-140 mm. It delivers a robust 1559 N pull force at 0.5 MPa, making it well-suited for moderate-load positioning tasks. The extruded aluminum barrel features sensor grooves on both sides, and this -S variant includes a magnet for direct compatibility with CMSE reed and DMSE electronic switches.
This SKU is configured with an SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance, alongside PT tapered port threads. The rear adjuster functions strictly as a mechanical stop to fine-tune the end position during commissioning; it does not hold the load without live air pressure. For true load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-75S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-75S |
|---|---|
| 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 SAIJ63AX140-75S
| 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 SAIJ63AX140-75S Is Used
Product Changeover
Dial in a new retracted end-stop distance between 65 and 140 mm during packaging size changes without disassembling the machine.
Machine Setup
Fine-tune the final rear position during initial commissioning to avoid hard mechanical crashes and perfect the timing curve.
Variable End Stops
Adjust the retract distance on the fly for sorting arms that must accommodate boxes of varying widths on a single line.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-75S the Right Cylinder?
Choose this 63 mm bore when your application requires a 1559 N pull force at 0.5 MPa, but a 40 mm bore (528 N pull) would be insufficient. The 75 mm adjustment range is particularly useful for product changeovers, allowing you to dial in a new end-stop distance (65 to 140 mm) without physically swapping the cylinder. The 20 mm rod diameter and M16x1.5 thread handle moderate side loads, though long unsupported strokes still require external guiding.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 140 mm nominal stroke, 75 mm adjustment, PT G3/8 port, and the -S magnet. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets. The standard speed range is 30-800 mm/s.
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 SAIJ63AX140-75S FAQ
At 0.5 MPa, this 63 mm bore cylinder provides a push force of 1559 N and a pull force of 1402 N. At the maximum operating pressure of 1.0 MPa, the push force reaches 318 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from 140 mm down to 65 mm. It only sets the travel end and does not lock or hold the load without continuous air pressure.
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