Airtac SAIJ80 Adjustable Cylinder SAIJ80X145-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X145-40 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 SAIJ80X145-40
The AirTAC SAIJ80X145-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 145 mm stroke that can be fine-tuned backward by up to 40 mm, yielding a usable travel window of 105 to 145 mm. Belonging to the 80 mm bore class, it generates 2513 N of push force and 2268 N of pull force at a 0.5 MPa operating pressure.
This model uses a carbon steel piston rod with an M20x1.5 thread, offering robust resistance to side loading, though any stroke near or over 300 mm still requires external guide rails. The extruded aluminum barrel includes sensor grooves on both sides for mounting AirTAC CMSE reed or DMSE electronic solid-state switches. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X145-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X145-40 |
|---|---|
| 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 SAIJ80X145-40
| 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 SAIJ80X145-40 Is Used
Product Size Changeovers
Dial in the exact end position from 105 to 145 mm when switching between product sizes on a packaging line, avoiding the need to physically swap cylinders.
Machine Setup Fine-Tuning
Trim the retract stroke by up to 40 mm during commissioning to perfectly time the contact point without adding bulky external mechanical stops.
Variable End-Stop Positioning
Adjust the effective travel window on the fly for multi-model production runs, ensuring precise clamping or pressing forces at each unique end position.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X145-40 the Right Cylinder?
Choose this 80 mm bore when you need to step up from a 50 mm bore (which provides 982 N push at 0.5 MPa) to handle significantly higher workloads, or step down from a 100 mm bore (3927 N push) for a more compact footprint. The SAIJ80X145-40 is selected specifically when a fixed-stroke SAI cylinder cannot accommodate machine changeovers, as the external rear stopper allows you to dial in the exact end position during commissioning without adding external stops.
When matching ISO 15552 replacements, ensure the bore is 80 mm, stroke is 145 mm, and adjustment range is 40 mm. The unit features PT tapered port threads (G3/8) and standard carbon steel rod material without a magnet. Remember that the rear adjuster acts solely as a travel stop and does not hold the load without live air; for true load-holding, 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 SAIJ80X145-40 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 the maximum 1.0 MPa pressure, it can deliver up to 513 kgf.
The rear adjusting screw acts as an external stopper that lets you shorten the effective stroke from the nominal 145 mm down to as little as 105 mm. This allows you to fine-tune the travel end during commissioning, though it does not lock the load without continuous air pressure.
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