Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-50 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 SAIJ80X325-50
The AirTAC SAIJ80X325-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel. With a 325 mm nominal stroke and a 50 mm adjustment range, it provides a usable travel window of 275 to 325 mm. This enables precise end-position tuning at commissioning without swapping out the cylinder or adding external stops. It delivers robust thrust, offering 4523N of push force and 2268N of pull force at 0.9 MPa.
This 80 mm bore unit uses a G3/8 port and a 25 mm carbon steel rod with an M20x1.5 thread, providing high rigidity to handle side loads. Because the 325 mm stroke is relatively long, an external guide is recommended to prevent rod wear. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed and DMSE electronic switches. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-50 |
|---|---|
| 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 SAIJ80X325-50
| 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 SAIJ80X325-50 Is Used
Machine Changeover
Dial in the 275-325 mm travel window during product size changeovers without physically swapping cylinders or repositioning external hard stops.
Variable End-Stop Diverter
Fine-tune the retract position of a diverter arm on the fly to accommodate different package sizes moving down the line.
Commissioning Calibration
Precisely set the exact end-of-stroke position during initial machine commissioning to clear mechanical interference and optimize cycle timing.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-50 the Right Cylinder?
Choose this 80 mm bore adjustable cylinder when your machine setup requires variable end-stops or frequent product-size changeovers, stepping up from a 63 mm bore that provides 2805N push force at 0.9 MPa. The 50 mm adjustment window allows you to dial in the exact retract position on the fly. Remember that the rear adjuster acts only as a mechanical stop and does not hold the load without live air; for true fail-safe load holding, consider the SAIL or BSAI series instead.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 325 mm stroke, 50 mm adjustment range, PT tapered G3/8 port, and the required mounting interface. Since the stroke exceeds 300 mm, ensure your setup includes an external guide to support the load and absorb side-load forces, protecting the 25 mm rod. This standard carbon steel rod version without a magnet is ideal for heavy-duty positioning tasks.
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 SAIJ80X325-50 FAQ
It features a rear adjusting screw that acts as a mechanical stop, allowing you to shorten the effective stroke by up to 50 mm. This provides a usable travel window of 275 to 325 mm, enabling fine-tuning of the end position without replacing the cylinder.
At a 0.9 MPa operating pressure, this double-acting cylinder provides 4523N of push force and 2268N of pull force. It uses a G3/8 port and operates at speeds between 30 and 800 mm/s.
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