Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-30
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-30 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 SAIJ80AX70-30
The AirTAC SAIJ80X70-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel down from 70 mm to a 40-70 mm usable window. Delivering 2513 N of push force at 0.5 MPa, it handles robust actuation while allowing precise end-position tuning during commissioning without swapping out the barrel or adding external stops.
This bore size features a 25 mm piston rod with an M20x1.5 thread, providing excellent rigidity and side-load resistance. The rod is constructed from SUS420J2 stainless steel, and the unit uses PT tapered port threads. The rear adjuster acts purely as a mechanical stop to set the retraction end-point; it does not lock or hold the load without continuous live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-30 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-30 |
|---|---|
| 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 SAIJ80AX70-30
| 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 SAIJ80AX70-30 Is Used
Machine Changeover
Dial in the 40-70 mm stroke window during product size changes to set new retraction end-points without physically swapping cylinders.
End-Position Calibration
Fine-tune the exact retracted position of a 2513 N clamping mechanism at commissioning, using the rear stopper instead of external shims.
Variable Assembly Stops
Adjust the travel end on an assembly line fixture to accommodate different part heights quickly and accurately.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-30 the Right Cylinder?
Choose this 80 mm bore when a 50 mm bore falls short on thrust (offering only 982 N at 0.5 MPa) but you want to avoid stepping up to a 100 mm bore that yields 3927 N. The 30 mm adjustment range is ideal for machinery that requires variable end-stops or frequent product changeovers, giving you a 40-70 mm travel window to dial in. For load-holding without live pressure, this cylinder is not suitable; you should look at the SAIL or BSAI locking cylinder series instead.
Because the stroke is under 300 mm, side-load stress is manageable, but long unsupported loads should still use an external guide. To match this ISO 15552 interchangeable cylinder exactly, specify an 80 mm bore, 70 mm nominal stroke, 30 mm adjustment, PT ports, and the SUS420J2 rod material. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ80AX70-30 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. It can reach a maximum push force of 4523 N at 0.9 MPa.
The rear adjuster screw lets you shorten the 70 mm nominal stroke by up to 30 mm, creating a 40-70 mm usable travel window. This allows you to set the exact retraction end-point during setup without adding external stops.
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