Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 70mm 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
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-40
The AirTAC SAIJ80X70-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the 70 mm nominal travel down to a highly specific 30-70 mm usable window. It delivers a 0.5 MPa push force of 2513 N, making it well-suited for medium-to-heavy handling tasks. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This variant is configured with a SUS304 stainless steel rod for superior corrosion resistance and PT tapered port threads. The rear adjuster functions purely as a mechanical stop to dial in the end position during commissioning; it does not lock or hold the load without live air pressure. For position-holding requirements, explore the SAIL or BSAI series instead.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 70 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 SAIJ80BX70-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×70 | 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 SAIJ80BX70-40 Is Used
Product Changeovers
Dial in the 30-70 mm stroke window instantly when switching to a different package size on the line, avoiding the need to physically swap out cylinders.
Commissioning Tuning
Fine-tune the retract end position during machine setup to absorb mechanical tolerances and achieve precise stopping distances without external spacers.
Sorting Diverter
Provides the 2513 N push force needed to reliably divert heavier totes or cartons on a conveyor while allowing quick stop adjustments.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-40 the Right Cylinder?
Choose this 80 mm bore when your application requires substantial thrust, but a 63 mm bore (offering 1559 N push force at 0.5 MPa) would be underpowered. The 40 mm adjustment range is particularly valuable on packaging or sorting lines where product sizes change frequently, allowing you to reposition the end stop in minutes without swapping the cylinder or adding external stops. Unlike a fixed-stroke SAI cylinder, this adjustable unit accommodates variable end positions natively.
Because the nominal stroke is 70 mm, an external guide is not strictly required for side-load management, though the 25 mm rod and M20x1.5 thread provide robust resistance to minor deflection. This SAIJ model supports the reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. It is dimensionally interchangeable per ISO 15552 without claiming direct brand equivalence.
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 SAIJ80BX70-40 FAQ
At a 0.5 MPa operating pressure, this 80 mm bore cylinder generates 2513 N of push force and 2268 N of pull force. It can deliver up to 4523 N push force at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that shortens the 70 mm nominal stroke by up to 40 mm, creating a 30-70 mm usable travel window. It only sets the end position and does not lock the load without continuous air pressure.
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Covers non-human-caused product damage.
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