Airtac SAIJ80 Adjustable Cylinder SAIJ80BX450-20
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX450-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 450mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ80 mm
- Stroke450 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX450-20
The AirTAC SAIJ80X450-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 20 mm. This creates a highly useful 430-450 mm usable stroke window, enabling precise end-position tuning at commissioning without swapping out the barrel or bolting on external stops.
This specific SKU is built with a SUS304 stainless steel rod (code B) for superior corrosion resistance and features a 25 mm rod diameter with an M20x1.5 thread. The robust 25 mm rod handles greater side loads, though at 450 mm of travel, an external guide is still recommended to prevent premature wear. The extruded aluminum barrel includes sensor grooves on both sides for future-proofing, and the rear adjuster functions strictly as a travel stop to set deceleration, not as a lock to hold the load without live air.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX450-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX450-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 450 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 | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | — |
| Max (@1.0 MPa) | 463 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80BX450-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×450 | 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 SAIJ80BX450-20 Is Used
Machine Setup Calibration
Dial in the exact 430-450 mm end-position during initial commissioning to perfect a pressing or clamping operation without machining custom spacers.
Product Changeover Stops
Quickly adjust the retract stop by up to 20 mm on a packaging line to accommodate different carton lengths without changing the cylinder.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX450-20 the Right Cylinder?
The adjustable stroke is selected over a fixed-stroke SAI when a machine requires variable end-stops for product changeovers or fine-tuning during setup. Because the stroke is 450 mm, supporting the load with an external guide is critical to avoid binding the rod.
To match this exact configuration for an ISO 15552 replacement, specify an 80 mm bore, 450 mm nominal stroke, a 20 mm adjustment range, PT tapered ports, and the SUS304 (B) rod material. Note that SAIJ uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. If your application requires true load-holding without continuous air pressure, this cylinder will not suffice; consider the SAIL (air-released lock) or BSAI (clamp-lock) variants 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 SAIJ80BX450-20 FAQ
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel by up to 20 mm, providing a usable stroke window of 430 to 450 mm. It sets the travel end and deceleration point, but it does not lock or hold the load without live air pressure.
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