Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 400mm 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
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20
The AirTAC SAIJ80X400-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 380-400 mm usable travel window, allowing you to dial back the 400 mm nominal stroke by up to 20 mm during commissioning without adding external stops. Delivering 2513 N of push force at 0.5 MPa, it handles substantial loads with precision.
This variant is built with a SUS420J2 stainless steel rod for improved corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, and the adjustable rear stopper acts purely as a travel end-limit, not a load-holding lock.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 400 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 SAIJ80AX400-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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 SAIJ80AX400-20 Is Used
Machine Changeover
Dial in the exact 380-400 mm end position during product size or format changes on the line without physically swapping the actuator.
Variable End Stops
Fine-tune the retract stroke limit by up to 20 mm to perfect the seating of heavy 2513 N assemblies during initial commissioning.
Long-Stroke Forming
Execute 400 mm travel operations with precision, using the rear screw to compensate for mechanical wear or slight fixture misalignments.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20 the Right Cylinder?
Choose this 80 mm bore when you need 2513 N push force at 0.5 MPa, stepping up from a 63 mm bore that provides 1559 N. The 20 mm adjustment range is ideal for fine-tuning the retract end position during machine setup or product changeover, avoiding the need to swap out a fixed-stroke SAI cylinder. For drop-in ISO 15552 replacements, match the 400 mm stroke, 20 mm adjuster, PT G3/8 ports, and the standard SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
Because the nominal stroke is 400 mm, the 25 mm rod and M20x1.5 thread provide rigidity, but an external guide is recommended to manage side loads over this long travel. Remember that the rear adjuster and air cushions only decelerate the load; they do not hold it without live air. For true load-holding without pressure, consider an external rod lock, a pilot-operated check valve, or AirTAC SAIL and BSAI cylinders.
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 SAIJ80AX400-20 FAQ
The rear adjuster screw lets you shorten the effective travel from 400 mm down to 380 mm. This creates a 20 mm tuning window to set the exact retract end position during setup without changing the cylinder or adding external mechanical stops.
At an operating pressure of 0.5 MPa, the SAIJ80X400-20 provides 2513 N of push force and 2268 N of pull force. It can deliver up to 4523 N of push force at 0.9 MPa.
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