Airtac SAIJ80 Adjustable Cylinder SAIJ80AX25-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX25-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 25mm 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
- Stroke25 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX25-20
The AirTAC SAIJ80X25-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, designed for applications requiring exact end-position tuning. It features a 25 mm nominal stroke that can be dialed back by up to 20 mm, yielding a highly precise 5 to 25 mm usable travel window. This bore size delivers substantial thrust, providing 2513 N of push force and 2268 N of pull force at 0.5 MPa, making it suitable for heavier actuation tasks.
This specific configuration incorporates an SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. The rear adjusting screw functions strictly as a travel stop to fine-tune deceleration and position at commissioning, meaning it does not hold the load without continuous live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX25-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX25-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 25 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 SAIJ80AX25-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×25 | 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 SAIJ80AX25-20 Is Used
Short-Stroke Clamping
Ideal for heavy-duty clamping tasks where the 5-25 mm adjustable window allows operators to dial in the exact grip position on variable part sizes.
Machine Changeover
Enables rapid setup adjustments on automated lines, using the rear stopper to tune the end position without replacing the entire cylinder.
End-Stop Calibration
Provides precise positioning control during equipment commissioning, ensuring the 25 mm travel perfectly meets the mechanical stopping point.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX25-20 the Right Cylinder?
Selecting this 80 mm bore cylinder is ideal when your application demands high force alongside a very short, finely tuned stroke. If the 2513 N push force at 0.5 MPa exceeds your requirements, stepping down to a 63 mm bore yields 1559 N, whereas moving up to a 100 mm bore provides 3927 N. The adjustable stroke mechanism is chosen over a fixed SAI cylinder when you need variable end-stops for product changeovers or setup calibration without swapping components.
When matching this ISO 15552 cylinder for a replacement, verify the 80 mm bore, 25 mm stroke, 20 mm adjustment range, PT port threads, and the absence of a magnet (non-S). The mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets. Because the stroke is under 300 mm, side-load stress on the 25 mm rod is minimized, though external guiding remains recommended for heavy lateral loads.
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 SAIJ80AX25-20 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 pressure of 1.0 MPa, it achieves a maximum push force of 513 kgf.
The rear adjuster screw allows you to trim the effective travel from the 25 mm nominal stroke down to as little as 5 mm, creating a 5-25 mm usable window. It acts as a mechanical stop to fine-tune the end position and does not function as a lock to hold the load without air pressure.
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