Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 325mm 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
- Stroke325 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-40
The AirTAC SAIJ80X325-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 2513N push force at 0.5 MPa. It features a 325 mm nominal stroke that can be fine-tuned backward by up to 40 mm, giving you an exact usable travel window of 285-325 mm. This built-in adjuster allows you to dial in the retract end-position at commissioning or during product changeover without swapping the cylinder or adding external stops.
Built with a 25 mm carbon steel piston rod and M20x1.5 rod thread, this 80 mm bore profile cylinder handles substantial side loads, though its 325 mm stroke means an external guide is still recommended for unsupported loads. It uses PT tapered G3/8 ports and includes variable air cushions at both ends. The rear adjuster acts purely as a travel stop to set the end position, so it will not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 325 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 SAIJ80X325-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×325 | 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 SAIJ80X325-40 Is Used
Machine Changeover
Dial in the 285-325 mm retract position during product-size changeovers without disassembling the line or adding external mechanical stops.
End-Stop Calibration
Fine-tune the final end-of-stroke position during commissioning to perfect a pressing or forming operation within the 40 mm window.
High-Force Positioning
Leverage the 80 mm bore's 2513N push force at 0.5 MPa to move heavy jigs into exact alignment before a secondary operation.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-40 the Right Cylinder?
Choose this 80 mm bore adjustable-stroke cylinder when your application demands high thrust (2513N push at 0.5 MPa) and exact end-stop tuning. If your force requirements are lower, stepping down to a 63 mm bore yields 1559N, while stepping up to a 100 mm bore provides 3927N. The SAIJ80X325-40 is selected over a fixed-stroke SAI model when you need a variable end-stop for machine setup or product-size changes. Because the stroke is 325 mm, ensure you use an external guide to support the rod and prevent excessive side-load wear.
To replace an existing ISO 15552 cylinder, match the 80 mm bore, 325 mm stroke, 40 mm adjustment range, PT G3/8 port, and your required mounting bracket (Basic, FA, LB, TC, FTC, TCM1, or TCM2). This unit has no magnet, so it will not work with CMSE or DMSE sensors; if you need position sensing, specify an -S model. Remember that the rear adjuster and air cushions only control travel ends and deceleration; for true load-holding without live air, 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 SAIJ80 Adjustable Cylinder SAIJ80X325-40 FAQ
The rear adjusting screw acts as a mechanical stopper that lets you shorten the effective stroke by up to 40 mm. This creates a usable travel window of 285-325 mm, allowing you to fine-tune the end position at commissioning without replacing the cylinder.
At 0.5 MPa operating pressure, the 80 mm bore generates 2513N of push force and 2268N of pull force. It can reach up to 4523N push force at 0.9 MPa.
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