Airtac SAIJ80 Adjustable Cylinder SAIJ80BX45-20
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX45-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 45mm 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
- Stroke45 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 SAIJ80BX45-20
The AirTAC SAIJ80X45-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 45 mm travel that can be dialed back by up to 20 mm, yielding a precise 25-45 mm usable stroke window for exact end-position tuning during commissioning.
This adjustable-stop design allows you to shorten the effective travel without swapping the cylinder or adding external stops. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches, and the robust 25 mm rod thread handles higher side loads. Remember that the rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX45-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX45-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 45 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 SAIJ80BX45-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×45 | 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 SAIJ80BX45-20 Is Used
Machine Setup Calibration
Dial in the exact 25-45 mm travel window during initial commissioning to perfect end-position stops without machining custom spacers.
Product Changeover
Quickly adjust the rear stopper on the line when swapping product sizes, saving downtime compared to replacing fixed-stroke cylinders.
Variable End-Stop Actuation
Ideal for clamping or pressing tasks where the effective stroke needs slight trimming to accommodate varying material thicknesses.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX45-20 the Right Cylinder?
Choose this 80 mm bore when an application requires substantial force—stepping down to a 63 mm bore yields 1559 N at 0.5 MPa, while moving up to a 100 mm bore provides 3927 N. The SAIJ80X45-20 is selected over a fixed SAI model when you need variable end-stops to accommodate product changeovers or fine-tune a machine setup. Because the total stroke is under 300 mm, side-load risks are moderate, but the 25 mm rod still requires an external guide for heavy lateral loads. For load-holding without continuous air pressure, use an external rod lock or pilot-operated check valve, as the SAIJ adjuster is not a brake. To match this ISO 15552 footprint, specify an 80 mm bore, 45 mm stroke, 20 mm adjustment, PT ports, and the SUS304 (B) rod option.
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 SAIJ80BX45-20 FAQ
At the maximum 1.0 MPa pressure, it delivers up to 513 kgf.
The rear adjuster screw acts as an external stopper that lets you shorten the 45 mm nominal stroke by up to 20 mm, creating a 25-45 mm usable travel window. It only sets the end position and does not lock or hold the load without live air pressure.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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