Airtac SAIJ80 Adjustable Cylinder SAIJ80AX55-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX55-20 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 a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke55 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX55-20
The AirTAC SAIJ80X55-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a usable travel window of 35 to 55 mm. Delivering 2513N of push force at 0.5 MPa, it is built with a 25mm SUS420J2 stainless steel rod for high side-load resistance. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches.
This model uses PT tapered G3/8 ports and relies on variable air cushions at both ends to decelerate the load. The rear adjuster acts purely as a travel stop for fine-tuning at commissioning; it does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX55-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX55-20 |
|---|---|
| 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 | 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 SAIJ80AX55-20
| 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 SAIJ80AX55-20 Is Used
Product Changeover Dial-In
Quickly modify the effective stroke from 35 to 55 mm during format changes on a packaging line without physically replacing the actuator.
Variable End-Stop Clamping
Fine-tune the clamping position on machined parts of varying thicknesses, using the rear screw to set the exact 80mm bore thrust limit.
Machine Commissioning
Eliminate the need to machine custom external spacers during initial setup by using the integrated stroke adjustment to find the perfect mechanical end point.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX55-20 the Right Cylinder?
Choose this 80mm bore when 50mm (1374N at 0.5MPa) lacks the power for your clamping or lifting task but you want to avoid the bulk of a 100mm cylinder. The 20mm adjustment range is ideal for product changeovers, letting you dial in the exact end position without swapping cylinders or adding external stops. For strokes of 300mm or more, an external guide is recommended to support the rod.
If your machine requires load-holding without continuous air pressure, note that this adjuster is not a brake. You would need to step up to an SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead. This SAIJ model is dimensionally interchangeable per ISO 15552 and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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 SAIJ80AX55-20 FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 513 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the nominal 55mm stroke by up to 20mm, creating a usable travel window of 35 to 55mm. It sets the end position but does not lock the load without live air.
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