Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm 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.
- BoreØ80 mm
- Stroke280 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-50S
The AirTAC SAIJ80X280-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 230-280 mm usable travel window from its 280 mm nominal length. Delivering 2513 N of push force at 0.5 MPa, it handles heavy positioning tasks. This configuration includes a SUS420J2 stainless steel rod and a -S magnet for solid-state DMSE or reed CMSE sensors.
The integrated rear stopper allows precise end-position tuning during commissioning without adding external stops. It uses a PT tapered G3/8 port and omits FB, CA, CB, and CR mounts, supporting only the Basic, FA, LB, TC, FTC, TCM1, and TCM2 interface subset.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 280 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | 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 SAIJ80 Adjustable Cylinder SAIJ80AX280-50S Is Used
Adjustable Machine Setup
Fine-tune the 230-280 mm travel window during machine commissioning to hit exact positioning targets without machining external stop collars.
Product Size Changeover
Quickly adapt the cylinder stroke for varying package lengths on a conveyor line using the 50 mm rear adjustment screw.
Heavy Clamping Operations
Leverage the 2513 N push force at 0.5 MPa to secure heavy workpieces, using the rear stopper to set precise clamping depth.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-50S the Right Cylinder?
Choose this 80 mm bore over the 63 mm size when you need more thrust; stepping down to 63 mm yields only 1559 N push force at 0.5 MPa. The 50 mm adjustment range is ideal for product changeovers on packaging lines, letting you dial in the exact end stop without swapping cylinders. Because the 280 mm stroke exceeds 300 mm, ensure you use an external guide to manage side loads on the 25 mm rod.
For ISO 15552 replacement, match the 80 mm bore, 280 mm stroke, 50 mm adjuster, PT G3/8 port, and -S magnet. Remember that the rear adjuster is a travel stop, not a lock; this cylinder cannot hold a load without live air. For true position holding, use a SAIL air-released lock or BSAI clamp-lock.
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 SAIJ80 Adjustable Cylinder SAIJ80AX280-50S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 4523 N of push force.
The rear adjuster acts as a mechanical stop that lets you trim the effective stroke back by up to 50 mm. For this 280 mm nominal stroke model, this creates a usable travel window of 230-280 mm, allowing precise end-position tuning without replacing the cylinder.
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