Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-30S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-30S 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 SAIJ80BX70-30S
The AirTAC SAIJ80X70-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to fine-tune the end position during commissioning. It features a 70 mm nominal stroke that can be dialed back by up to 30 mm, providing a precise 40-70 mm usable travel window. In the 80 mm bore class, this actuator generates 2513 N of push thrust and 2268 N of pull thrust at 0.5 MPa operating pressure.
This variant includes a SUS304 stainless steel rod (code B) for superior corrosion resistance and uses PT tapered port threads with a G3/8 connection. The extruded aluminum barrel includes sensor grooves on both sides, and because this model carries the -S magnet option, it is fully compatible with AirTAC CMSE reed and DMSE electronic solid-state switches for precise position feedback. The rear adjuster acts purely as a mechanical stop to set the travel end, meaning it will not hold a load dynamically without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-30S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-30S |
|---|---|
| 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 SAIJ80BX70-30S
| 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 SAIJ80BX70-30S Is Used
Machine Changeover
Quickly dial back the 70 mm stroke by up to 30 mm during product size changeovers to set new retract distances without changing the cylinder.
End-Position Tuning
Fine-tune the exact end-of-stroke stop at commissioning to absorb mechanical tolerances and achieve perfect positioning of the 2513 N push force.
Variable End Stops
Use the 40-70 mm adjustable travel window to set precise retract distances for feeding mechanisms that handle varying material thicknesses.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-30S the Right Cylinder?
Select this 80 mm bore adjustable-stroke cylinder when an application demands exact end-position tuning without swapping out the physical actuator or adding external stops. If your process requires less force, stepping down to a 63 mm bore yields 1559 N of push force at 0.5 MPa; conversely, moving up to a 100 mm bore provides 3927 N. This SAIJ model is dimensionally interchangeable per ISO 15552, so you can match it directly to an existing fixture by bore, 70 mm stroke, 30 mm adjustment range, PT G3/8 port, and the -S magnet requirement.
The SAIJ mounting set supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 configurations, deliberately omitting FB, CA, CB, and CR brackets. Because the 25 mm rod and M20x1.5 thread provide robust rigidity, the cylinder handles side loads well, though any long unsupported stroke still necessitates an external guide. For applications that require true load-holding without continuous air pressure, consider the AirTAC SAIL lock or BSAI clamp-lock series instead of relying on the rear stopper.
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 SAIJ80BX70-30S FAQ
At 0.5 MPa, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At the maximum operating pressure of 1.0 MPa, it delivers up to 513 kgf.
The rear adjuster acts as a mechanical stop that lets you shorten the 70 mm nominal stroke by up to 30 mm, creating a 40-70 mm usable travel window. It only sets the travel end and does not lock or hold the load without live air pressure.
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