Airtac SAIJ80 Adjustable Cylinder SAIJ80AX50-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX50-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 50mm 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
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX50-20
The AirTAC SAIJ80X50-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 2513N of push force at 0.5 MPa. Its 50 mm nominal stroke can be dialed back by up to 20 mm, creating a precise 30 to 50 mm usable travel window for fine-tuning end positions during commissioning. The extruded aluminum barrel features sensor grooves on both sides, allowing you to add CMSE or DMSE switches if needed.
This variant features an SUS420J2 stainless steel rod (material code A) and PT tapered port threads. The 25 mm rod and M20x1.5 thread provide robust resistance to side loads, while the adjustable rear stopper acts purely as a travel limit and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX50-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX50-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 50 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 SAIJ80AX50-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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 SAIJ80AX50-20 Is Used
Machine Changeover
Dial in the 30-50 mm travel window during product size changes to set new end positions rapidly without mechanical rebuilds.
End-Stop Tuning
Fine-tune the retract position at commissioning using the rear screw, avoiding the need to machine custom external spacers.
Assembly Pressing
Leverage the 2513N push force at 0.5 MPa for light pressing tasks where the exact contact depth must be adjusted on the fly.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX50-20 the Right Cylinder?
Choose this 80 mm bore when an application requires more force than a 63 mm cylinder (which provides 1559N push at 0.5 MPa) but less than the massive output of a 100 mm bore (3927N at 0.5 MPa). The adjustable stroke is ideal for product changeovers on a line, letting operators set variable end-stops without swapping out the entire cylinder or adding external physical stops.
When matching your ISO 15552 replacement, verify the 50 mm stroke, 20 mm adjustment range, PT port threads, and mounting style. SAIJ supports a specific subset of mounts: Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the rear adjuster is a stop rather than a lock, applications requiring true load-holding without continuous air pressure should utilize an external rod lock, a pilot-operated check valve, or explore the AirTAC SAIL and BSAI series.
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 SAIJ80AX50-20 FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 20 mm. This transforms the 50 mm nominal stroke into a 30 to 50 mm adjustable travel window, enabling precise end-position tuning without changing the cylinder.
At 0.5 MPa operating pressure, it provides 2513N of push force and 2268N of pull force. At 0.7 MPa, the push force increases to 3518N.
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