Airtac SAIJ80 Adjustable Cylinder SAIJ80AX650-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX650-50 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 SAIJ80AX650-50
The AirTAC SAIJ80X650-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 650 mm nominal stroke by up to 50 mm. This creates a precise 600-650 mm usable travel window for fine-tuning end positions during commissioning without swapping hardware. It delivers robust thrust, generating 2513 N of push force and 2268 N of pull force at 0.5 MPa.
Built for demanding environments, this unit uses a SUS420J2 stainless steel rod (material code A) for superior corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is added later. It supports a standard operating speed of 30-800 mm/s and relies on adjustable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX650-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX650-50 |
|---|---|
| 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 SAIJ80AX650-50
| 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 SAIJ80AX650-50 Is Used
Variable End-Stop Positioning
Dial in the exact 600 to 650 mm retraction point during machine setup to accommodate different material lengths without installing physical shims.
Product Changeover Systems
Quickly adjust the rear stopper on a packaging line to handle varying box sizes, utilizing the 2513 N push force to move heavy loads efficiently.
Long-Stroke Assembly Presses
Leverage the 650 mm travel and adjustable air cushions to gently decelerate heavy tooling, fine-tuning the final approach distance on the fly.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX650-50 the Right Cylinder?
Selecting this 80 mm bore makes sense when your application requires substantial force, such as the 2513 N push output at 0.5 MPa, but stepping up to a 100 mm bore (which yields 3927 N push) would be overkill. Conversely, if your load is lighter, dropping to a 63 mm bore provides 1559 N and a smaller footprint. The adjustable stroke is ideal for product changeovers, letting you shift the end-stop dynamically rather than machining external stops or buying a fixed-stroke SAI cylinder.
Because the nominal stroke is 650 mm, the M20x1.5 piston rod will experience leverage forces under side loading, so an external guide rail is strongly recommended to prevent premature seal wear. Remember that the rear adjuster acts only as a travel stop, not a lock; the SAIJ80X650-50 cannot hold a load without continuous live air pressure. For true fail-safe load holding, consider the SAIL or BSAI series. To match this ISO 15552 interchangeable cylinder exactly, specify: 80 mm bore, 650 mm stroke, 50 mm adjustment, PT ports, SUS420J2 rod, and no magnet.
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 SAIJ80AX650-50 FAQ
At a standard 0.5 MPa operating pressure, this 80 mm bore cylinder generates 2513 N of push force and 2268 N of pull force. At its maximum 1.0 MPa pressure, it can output up to 513 kgf.
The rear adjuster screw allows you to shorten the effective travel from the 650 mm nominal stroke by up to 50 mm, providing a usable window of 600-650 mm. This stopper sets the end position but does not lock the load without live air pressure.
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