Airtac SAIJ80 Adjustable Cylinder SAIJ80AX650-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX650-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 650mm 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
- Stroke650 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX650-20
The AirTAC SAIJ80X650-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 630 to 650 mm usable travel window, allowing you to dial back the 650 mm nominal stroke by up to 20 mm during commissioning without adding external stops. It delivers 3518 N of push force at 0.7 MPa, utilizing a 25 mm carbon steel rod with an M20x1.5 thread.
This model features a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides. Mounting options include the reduced SAIJ set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR variants.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX650-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX650-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 650 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 SAIJ80AX650-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×650 | 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 SAIJ80AX650-20 Is Used
Product Changeover Stops
Dial in the 630-650 mm retract end-position on packaging lines when switching carton sizes, avoiding external stop hardware changes.
Long-Stroke Assembly Press
Provides 3518 N of thrust at 0.7 MPa to seat components, with the rear screw allowing exact final position calibration.
Extended Material Handling
Moves payloads along a 650 mm travel path while the stainless SUS420J2 rod withstands minor environmental exposure.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX650-20 the Right Cylinder?
Choose this 80 mm bore when 50 mm (1374 N at 0.5 MPa) is too weak and 63 mm (2182 N at 0.7 MPa) lacks the necessary thrust. The adjustable stroke is ideal for product-size changeovers on a line, fine-tuning the retract end-position without swapping the hardware. Because the 650 mm stroke is long, an external guide is recommended to manage side loads and prevent rod deflection.
For load-holding without live air pressure, note that the rear adjuster is a travel stop, not a lock. The SAIL or BSAI series, or an external rod lock, is required for true fail-safe holding. This cylinder is dimensionally interchangeable per ISO 15552, with a 25 mm rod, PT ports, and no magnet (-S not specified).
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 SAIJ80AX650-20 FAQ
At 0.7 MPa operating pressure, this 80 mm bore cylinder provides 3518 N of push force and 2268 N of pull force. The maximum thrust is 513 kgf at 1.0 MPa.
The rear adjuster acts as a mechanical stop that lets you trim the effective travel back by up to 20 mm, creating a 630 to 650 mm usable stroke window. It only sets the travel end and does not lock the load without live air pressure.
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