Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-20 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 SAIJ80BX650-20
The AirTAC SAIJ80X650-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 630 to 650 mm, allowing you to dial back the extend position by up to 20 mm during commissioning without adding external stops. It delivers a robust 4523 N of push force at 0.9 MPa, making it ideal for heavy-duty positioning tasks.
This variant uses a SUS304 stainless steel rod (code B) for superior corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed or DMSE electronic switches. The rear adjuster acts purely as a travel stop to fine-tune the end position; it does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-20 |
|---|---|
| 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 SAIJ80BX650-20
| 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 SAIJ80BX650-20 Is Used
Product Changeovers
Shift the end-stop by up to 20 mm during product size changes without removing the cylinder or adding external mechanical stops.
Commissioning Tuning
Fine-tune the 630-650 mm extend position at machine setup to perfectly time the stroke end without swapping components.
Heavy Conveyor Positioning
Use the 4523 N push force to move heavy pallets or fixtures, relying on the rear adjuster to set the exact transfer distance.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-20 the Right Cylinder?
Select this 80 mm bore cylinder when your application requires 4523 N of push force at 0.9 MPa and precise end-position tuning. The 20 mm adjustment range is perfect for product changeovers on a line, letting you shift the end-stop without swapping the cylinder. If you need less force, a 63 mm bore offers 2805 N at 0.9 MPa; if you need more, step up to a 100 mm bore providing 7068 N. For load-holding without continuous air pressure, use an SAIL or BSAI cylinder instead of relying on the SAIJ adjuster.
This SAIJ80X650-20 is dimensionally interchangeable with ISO 15552 cylinders. To match it exactly, confirm the 650 mm stroke, 20 mm adjustment, PT G3/8 port, and the SUS304 (B) rod material. Because the stroke is 650 mm, the 25 mm rod diameter and M20x1.5 rod thread will carry some side load, but an external guide is recommended for long unsupported travel. It supports the Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounting styles.
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 SAIJ80BX650-20 FAQ
The rear adjuster screw lets you shorten the 650 mm nominal stroke by up to 20 mm, providing a usable travel window of 630 to 650 mm. It acts as a mechanical stop to fine-tune the end position and does not lock the load without live air pressure.
At an operating pressure of 0.9 MPa, this 80 mm bore cylinder generates 4523 N of push force and 4071 N of pull force. It operates at speeds between 30 and 800 mm/s.
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