Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-40S 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 SAIJ80X325-40S
The AirTAC SAIJ80X325-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 4523N of push force at 0.9 MPa and features a 25mm carbon steel piston rod. The built-in rear stopper allows you to trim the nominal 325mm stroke back by up to 40mm, providing a precise 285-325mm usable travel window for exact end-position tuning during commissioning.
This unit includes a magnet (-S) for use with AirTAC CMSE reed and DMSE solid-state sensors, which mount cleanly into the dual-side sensor grooves on the extruded aluminum barrel. The 325mm stroke is well within the 1500mm maximum standard travel for this bore, but the long unsupported length combined with the M20x1.5 rod thread means external guides are recommended to handle side loads. The SAIJ mounting set omits FB, CA, CB, and CR options, supporting only Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-40S |
|---|---|
| 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 SAIJ80X325-40S
| 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 SAIJ80X325-40S Is Used
Product Changeover
Dial in the 285-325mm travel window on the fly to accept different carton sizes without changing machine hardware.
End-Stop Calibration
Fine-tune the retract end-position at commissioning to dial out mechanical play and hit exact machine timing.
Diverter Positioning
Set precise diverting distances on packaging lines where the rear stopper handles end-position tuning safely.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-40S the Right Cylinder?
Choose this 80mm bore when 50mm (1374N push at 0.5 MPa) is too weak or 100mm (5497N at 0.7 MPa) is oversized. The adjustable stroke is selected over a fixed SAI when you need variable end-stops to accommodate product size changes on a line without physically swapping cylinders. The PT tapered port threads match standard pneumatic fittings.
Because the 325mm stroke exceeds 300mm, an external guide rail is highly recommended to prevent rod binding under side loads. Remember that the rear adjuster is a mechanical stop, not a lock; the SAIJ does not hold loads without live air pressure. For fail-safe load holding, integrate an external rod lock or select the SAIL or BSAI series instead.
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 SAIJ80X325-40S FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke by up to 40mm. This provides a usable travel window of 285 to 325mm, allowing you to fine-tune the end position without adding external stops.
At 0.9 MPa operating pressure, it provides 4523N of push force and 4071N of pull force. At 0.5 MPa, the push force is 2513N.
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