Airtac SAIJ80 Adjustable Cylinder SAIJ80AX55-20S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80AX55-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 55mm 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
- Stroke55 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 SAIJ80AX55-20S
Its 55mm nominal stroke can be dialed back by up to 20mm, creating a precise 35-55mm usable travel window for exact end-position tuning. The extruded aluminum barrel features sensor grooves on both sides, and this specific SKU includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors.
This model utilizes a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and features PT tapered port threads (G3/8). The rear adjuster acts purely as a mechanical stop to decelerate the travel end, meaning it does not hold the load without live air pressure. For load-holding requirements without continuous air, an external rod lock or related SAIL pneumatic lock cylinder is required.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX55-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX55-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 55 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 SAIJ80AX55-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×55 | 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 SAIJ80AX55-20S Is Used
Product Changeovers
Dial in the 35-55mm travel window on the fly to accommodate varying package sizes on a packaging line without changing the cylinder.
Machine Setup
Fine-tune the retract end-position during commissioning to achieve precise mechanical alignment without adding external stopper blocks.
Variable End Stops
Use the rear adjuster to safely decelerate and set the exact end-of-stroke position for high-force clamping or pressing tasks.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX55-20S the Right Cylinder?
The adjustable stroke is ideal for fine-tuning at commissioning, unlike a fixed-stroke SAI cylinder.
When replacing an ISO 15552 cylinder, match the 80mm bore, 55mm stroke, 20mm adjustment range, PT G3/8 port, and the -S magnet requirement. The SAIJ series supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. Since the 25mm rod and M20x1.5 thread handle substantial side loads, ensure proper external guiding for any unsupported 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 SAIJ80AX55-20S FAQ
The rear adjusting screw acts as a mechanical stop that lets you shorten the effective stroke by up to 20mm. This creates a usable travel window of 35-55mm from the 55mm nominal stroke, allowing precise end-position tuning without swapping the cylinder.
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1-Year Warranty
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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