Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-40
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 275mm 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
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-40
The AirTAC SAIJ63X275-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 235 to 275 mm, allowing you to dial back the nominal stroke by up to 40 mm during commissioning. Operating at 0.15 to 1.0 MPa, it generates 1559 N of pull force and 2182 N of push force at 0.7 MPa.
This variant is built with a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU is configured without a piston magnet. The rear adjuster acts purely as a mechanical stop to fine-tune the end position without adding external stops.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-40 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 275 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 SAIJ63AX275-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×275 | 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 SAIJ63AX275-40 Is Used
Product Changeover
Dial in the exact 235 to 275 mm end-stop position during production line changeovers without replacing the cylinder or adding external mechanical stops.
Machine Setup
Fine-tune the retract end position at commissioning to perfect part seating or clamping depth, absorbing mechanical tolerance stack-ups directly at the rear adjuster.
Variable End Stops
Adjust the effective stroke on the fly for equipment running multiple product sizes, relying on the 40 mm trim range to adapt the travel window quickly.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-40 the Right Cylinder?
Choose this 63 mm bore when your application requires 1559 N pull force at 0.5 MPa, stepping up from the 50 mm bore (825 N pull) for heavier payloads, or down from the 80 mm bore (2268 N pull) to save space. The adjustable 235-275 mm travel window is ideal for product changeovers on a production line, allowing you to reposition the end-of-stroke stop without swapping the cylinder. For fixed travel requirements without the need for end-tuning, a standard SAI cylinder is sufficient.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 275 mm stroke, 40 mm adjustment range, PT port threads, and basic mounting interface. Note that the SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets. Because the stroke is 275 mm, ensure adequate external guiding to prevent excessive side-load on the rod. The rear adjuster is a travel stop, not a lock; for load-holding without live air pressure, use an SAIL or BSAI cylinder.
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 SAIJ63AX275-40 FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from 275 mm down to 235 mm. It fine-tunes the retract end position at commissioning or during product changeovers without swapping the cylinder. It is a travel stop, not a lock, and does not hold the load without live air pressure.
At 0.5 MPa, this 63 mm bore cylinder generates 1559 N of pull force and 2182 N of push force. At the maximum operating pressure of 1.0 MPa, it delivers a maximum push force of 2805 N.
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