Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-30
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-30 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 SAIJ80AX400-30
The AirTAC SAIJ80X400-30 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 400 mm nominal stroke that can be fine-tuned backward by up to 30 mm, establishing a usable travel window of 370-400 mm for precise end-position calibration. Driven by a G3/8 port, it delivers 2513 N of push thrust at 0.5 MPa and 4523 N at 0.9 MPa.
This unit is built with an SUS420J2 stainless steel rod for enhanced corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU lacks the internal magnet, meaning pneumatic end-position sensing must be used instead of CMSE or DMSE switches. The rear adjuster functions strictly as a mechanical stop to dial in the travel limit and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-30 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-30 |
|---|---|
| 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 SAIJ80AX400-30
| 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 SAIJ80AX400-30 Is Used
Machine Changeover
Dial in the 370-400 mm travel window during product size transitions to set new end-stops without replacing the cylinder.
Fixture Positioning
Fine-tune the rear stopper at commissioning to align heavy 80 mm bore clamping fixtures accurately along the 400 mm stroke.
Variable End Stops
Adjust the retract position by up to 30 mm to accommodate varying package sizes or pusher distances on a packaging line.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-30 the Right Cylinder?
Selecting this 80 mm bore over a neighboring 63 mm unit (which yields 1559 N push at 0.5 MPa) is justified when your process demands higher thrust to move heavier fixtures. The 30 mm adjustment range is ideal for machine setups requiring variable end-stops or product-size changeovers without physically swapping the cylinder. For load-holding applications without continuous air pressure, this cylinder is insufficient since the adjuster is only a stop; you should explore the SAIL (air-released lock) or BSAI (clamp-lock) series instead.
Because the 400 mm stroke is substantial, the 25 mm rod and M20x1.5 thread provide robust support, but long unsupported strokes still require an external guide to prevent side-load damage. When matching ISO 15552 replacement dimensions, verify the 80 mm bore, 400 mm stroke, 30 mm adjustment, PT port thread, and the absence of a magnet (-S). The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR.
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 SAIJ80AX400-30 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 0.9 MPa, the push force increases to 4523 N.
The rear adjuster acts as a mechanical stop that shortens the 400 mm nominal stroke by up to 30 mm, giving a usable travel range of 370-400 mm. It only sets the end position and does not lock or hold the load without live air pressure.
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