Airtac SAIJ80 Adjustable Cylinder SAIJ80AX475-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX475-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 475mm 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
- Stroke475 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX475-20S
The AirTAC SAIJ80X475-20-S 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 precise 455-475 mm usable window, letting you dial in the retract end-position during commissioning without adding external stops. It delivers robust thrust, pushing with 4523N and pulling with 2268N at 0.9 MPa.
This specific SKU is configured with a SUS420J2 stainless steel rod (option A) for superior corrosion resistance and a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides, and because this is an -S variant, it contains a magnet ready for AirTAC CMSE reed or DMSE electronic solid-state switches. It uses variable air cushions at both ends and operates at speeds between 30 and 800 mm/s.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX475-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX475-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 475 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 SAIJ80AX475-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×475 | 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 SAIJ80AX475-20S Is Used
Machine Changeover
Dial in the 455-475 mm retract position during product size changes without swapping out the physical cylinder or re-engineering external stop blocks.
End-Stop Tuning
Fine-tune the final end-of-stroke position during machine commissioning to absorb mechanical tolerances and achieve exact placement of the tooling.
Variable Positioning
Set a precise intermediate travel limit on an automated line where the rear stopper screw handles the deceleration and final position tuning.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX475-20S the Right Cylinder?
Choose this 80 mm bore when a 63 mm bore (providing 2805N push force at 0.9 MPa) is insufficient to move your load, but a 100 mm bore (7068N) would be oversized and waste air volume. The adjustable stroke is ideal for product changeovers on a line, allowing you to shift the end-stop by 20 mm rather than physically swapping the entire cylinder. For a fixed-travel setup without the adjusting screw, the standard SAI series is the alternative.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 475 mm stroke, 20 mm adjustment range, PT G3/8 port, and -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Because the stroke is 475 mm, the 25 mm rod will experience bending moments under high side loads; always use an external guide to prevent binding. Note that the rear adjuster is a travel stop, not a lock; this cylinder cannot hold a load without live air, so for fail-safe holding, consider the SAIL or BSAI series 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 SAIJ80AX475-20S FAQ
At 0.9 MPa, this 80 mm bore cylinder provides a push force of 4523N and a pull force of 2268N. At the maximum operating pressure of 1.0 MPa, it can deliver up to 513 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 475 mm nominal stroke by up to 20 mm, creating a usable travel window of 455-475 mm. It only sets the travel end and decelerates the load; it does not lock or hold the load without continuous air pressure.
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