Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-30
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-30 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 SAIJ80BX650-30
The AirTAC SAIJ80X650-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits you to dial back the nominal 650 mm travel by up to 30 mm. This yields a usable end-position window of 620 to 650 mm, allowing precise tuning at commissioning without swapping the cylinder or adding external stops. It delivers a robust 4523 N of push force at 0.9 MPa.
Built with a SUS304 stainless steel rod for superior corrosion resistance, this model uses PT tapered ports and operates at speeds of 30-800 mm/s. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting set spans Basic, FA, LB, TC, FTC, TCM1, and TCM2. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-30 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-30 |
|---|---|
| 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 SAIJ80BX650-30
| 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 SAIJ80BX650-30 Is Used
Variable End-Stop Tuning
Fine-tune the retract end-position within the 620-650 mm window during machine commissioning to accommodate slight mechanical variations.
Product Changeover
Quickly adjust the effective stroke by up to 30 mm when switching a conveyor line to handle a different package size without changing hardware.
Long-Stroke Assembly
Leverage the 4523 N push force and 650 mm travel for large assembly presses, using the rear stopper to dial in the exact clamping distance.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-30 the Right Cylinder?
Choose this 80 mm bore when you need more thrust than a 63 mm cylinder (which provides 2805 N push at 0.9 MPa) but less than the massive 7068 N of a 100 mm bore. The 30 mm adjustment range is ideal for product changeovers where the exact end-of-stroke position varies slightly, eliminating the need to machine custom external spacers. Because the nominal stroke is 650 mm, an external guide is highly recommended to prevent excessive side-loading on the piston rod.
For an ISO 15552 replacement match, specify an 80 mm bore, 650 mm stroke, 30 mm adjustment, PT port thread, and the required mounting bracket. Note that this plain SAIJ does not hold its position without live air; if load-holding is required, 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 SAIJ80BX650-30 FAQ
At an operating pressure of 0.9 MPa, the 80 mm bore provides a push force of 4523 N and a pull force of 4071 N. The maximum thrust at 1.0 MPa is 513 kgf.
The rear adjuster screw acts as a mechanical stop that can shorten the 650 mm nominal stroke by up to 30 mm, giving an effective travel range of 620 to 650 mm. It only sets the end position and does not lock or hold the load without continuous air pressure.
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