Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-40
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 280mm 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
- Stroke280 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-40
The AirTAC SAIJ63X280-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 280 mm nominal travel by up to 40 mm for a precise 240-280 mm usable window. Delivering 1559 N of push force at 0.5 MPa, it handles robust actuation tasks while featuring a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This adjustable model lets you fine-tune the retract end position during commissioning without swapping hardware or adding external stops. The rear screw acts purely as a travel stop and works alongside standard air cushions to decelerate the load, but it does not hold the position without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI variants.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-40 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 280 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 SAIJ63AX280-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×280 | 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 SAIJ63AX280-40 Is Used
Machine Changeover
Quickly adjust the 240-280 mm stroke window during product size transitions without replacing the cylinder or bolting on external physical stops.
End-Position Tuning
Fine-tune the retract end-stop during initial commissioning to achieve exact positioning, compensating for mechanical tolerances in the fixture.
Variable Diverter Stroke
Adjust the actuation length on a sorting line to handle different package sizes on the fly using the rear stopper screw.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-40 the Right Cylinder?
Choose this 63 mm bore when a 50 mm cylinder (providing 982 N push at 0.5 MPa) lacks the necessary thrust, but an 80 mm bore (2513 N) would be physically oversized. The -40 adjustment code is selected over a fixed SAI cylinder when a machine requires variable end-stops or product-size changeovers, giving a 40 mm setup window. The PT tapered port threads ensure a tight pneumatic seal, and the M16x1.5 rod thread provides a durable mounting interface. Because the total stroke is 280 mm, the M16 rod should be adequately supported by an external guide to prevent excessive side-loading and premature seal wear.
When specifying a replacement, verify the 63 mm bore, 280 mm stroke, 40 mm adjustment range, PT port thread, and the required mounting style. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. It is dimensionally interchangeable per ISO 15552 standards.
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 SAIJ63AX280-40 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N.
The rear adjuster screw allows you to shorten the 280 mm nominal stroke by up to 40 mm, creating a 240-280 mm usable travel window. The screw functions as a mechanical stop to set the end position and does not lock the load without continuous air pressure.
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