Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-75S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-75S 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 SAIJ63AX280-75S
The AirTAC SAIJ63X280-75-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 280 mm travel but integrates an external stopper screw that allows you to dial back the effective stroke by up to 75 mm, creating a precise 205-280 mm usable end-position window. This fine-tuning capability is ideal for machine setup and product changeovers, eliminating the need to physically swap cylinders or bolt on external stops. Delivering 2182 N of push force at 0.7 MPa, it handles robust actuation tasks while maintaining a standard ISO 15552 mounting footprint.
This specific SKU is configured with a SUS420J2 stainless steel rod (material code A) for enhanced resistance to corrosion and surface wear. The barrel features sensor grooves on both sides, and because this model includes a magnet (-S), it supports direct mounting of AirTAC CMSE reed and DMSE electronic solid-state switches for exact end-of-stroke detection. Fluid connections use PT tapered ports sized at G3/8, and the extruded aluminum profile incorporates adjustable air cushions at both ends to absorb kinetic energy. Remember that the rear adjuster and cushions act as travel stops and deceleration devices only; they do not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-75S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-75S |
|---|---|
| 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 SAIJ63AX280-75S
| 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 SAIJ63AX280-75S Is Used
Product Changeover Calibration
Dial in the 205-280 mm travel window during production line format changes, allowing rapid mechanical adjustment without replacing the actuator.
Variable End-Stop Positioning
Fine-tune the retract end-position at machine commissioning to perfect seating or clamping distances without adding external stopper blocks.
Corrosion-Resistant Actuation
Leverage the SUS420J2 stainless steel rod in humid or lightly corrosive manufacturing environments while maintaining 2182 N of push force at 0.7 MPa.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-75S the Right Cylinder?
Select this 63 mm bore cylinder when your application requires a 280 mm nominal stroke but demands on-the-fly end-position tuning within a 205-280 mm window. If you need less push force and can accept a smaller rod, stepping down to a 50 mm bore yields 1374 N at 0.7 MPa. Conversely, moving up to an 80 mm bore provides 3518 N for heavier payloads. Because the 280 mm stroke is relatively long, you should ensure adequate external guiding to prevent excessive side-loading on the 20 mm rod and its M16x1.5 thread, despite the robust stainless steel construction.
An adjustable-stroke SAIJ is chosen over a fixed-stroke SAI when a machine handles multiple product sizes or requires precise mechanical end-stop calibration during commissioning. For load-holding without continuous air pressure, note that this cylinder's rear adjuster is strictly a mechanical stop, not a lock; you would need to specify an SAIL (air-released lock) or BSAI (clamp-lock) cylinder, or utilize an external pilot-operated check valve. This SAIJ63X280-75-S is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ63AX280-75S FAQ
At an operating pressure of 0.7 MPa, this 63 mm bore cylinder provides 2182 N of push force and 1402 N of pull force. At 0.5 MPa, it delivers 1559 N push and 1402 N pull.
The rear external stopper screw allows you to mechanically shorten the 280 mm nominal stroke by up to 75 mm. This creates a usable travel window of 205-280 mm, enabling precise end-position tuning without swapping the cylinder.
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