Airtac SAIJ80 Adjustable Cylinder SAIJ80X145-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X145-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 145mm 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
- Stroke145 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X145-40S
The AirTAC SAIJ80X145-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2513 N push force at 0.5 MPa, making it suitable for heavy-duty positioning. The integrated -S magnet enables position sensing with AirTAC CMSE reed and DMSE electronic switches.
Featuring a 145 mm nominal stroke, the external stopper lets you dial back the travel by up to 40 mm, creating a precise 105-145 mm usable window. This allows you to fine-tune the retract end-position at commissioning without swapping hardware. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X145-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X145-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 145 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 SAIJ80X145-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×145 | 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 SAIJ80X145-40S Is Used
Product Changeover
Dial in the exact 105-145 mm retract position on the fly when switching between product sizes on a packaging line.
End-Stop Tuning
Fine-tune the final resting position during machine commissioning without machining external stopper blocks.
Heavy Positioning
Leverage the 2513 N push force to move heavy pallets or fixtures, adjusting the stroke to clear obstructions.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X145-40S the Right Cylinder?
Choose this 80 mm bore when a 50 mm bore (982 N push at 0.5 MPa) lacks thrust or a 100 mm bore (3927 N) is oversized. The adjustable 105-145 mm travel is ideal for machine setups requiring variable end-stops during product changeovers, avoiding the need for fixed-stroke SAI cylinders. A standard PT tapered port and carbon steel rod are built in.
Because the 145 mm stroke is under 300 mm, side-load risks are moderate, but external guides are still recommended for heavy off-center loads. Remember that the rear adjuster is a travel stop, not a lock; the SAIJ80X145-40-S will not hold its load without live air. For fail-safe load holding, consider an external rod lock or the AirTAC SAIL series.
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 SAIJ80X145-40S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At 0.7 MPa, the push force increases to 3518 N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 145 mm nominal stroke by up to 40 mm. This creates an adjustable travel window of 105-145 mm. Note that it is a stop, not a lock, and requires live air to hold position.
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