Airtac SAIJ80 Adjustable Cylinder SAIJ80X155-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X155-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 155mm 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
- Stroke155 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X155-40
The AirTAC SAIJ80X155-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 2513N of push force at 0.5 MPa. By turning the external stopper screw, you can trim the nominal 155mm travel back by up to 40mm, creating a precise 115-155mm usable window. This allows exact end-position tuning at commissioning without swapping out the entire actuator.
It features a carbon steel piston rod with an M20x1.5 thread and a G3/8 port. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting, while the mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets. The rear adjuster functions strictly as a travel stop to set deceleration, not as a lock to hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X155-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X155-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 155 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 SAIJ80X155-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×155 | 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 SAIJ80X155-40 Is Used
Product Changeovers
Quickly dial in the 115-155mm travel window during format size changes on a packaging line, eliminating the downtime needed to swap cylinders or add machined spacers.
Variable End Stops
Fine-tune the retraction point of a diverter arm on a conveyor system to accommodate different package lengths without altering the machine's base mounting plate.
Machine Setup
Precisely set the end-of-stroke position during initial commissioning to prevent over-travel and ensure delicate components are contacted with the exact required reach.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X155-40 the Right Cylinder?
Choose this 80mm bore when an application requires higher thrust than a 63mm cylinder (which provides 1559N push at 0.5 MPa) but has spatial constraints that prevent stepping up to a 100mm bore. The adjustable 115-155mm window is ideal for product changeovers on a packaging line, allowing operators to dial in the exact stroke length on the fly instead of machining custom external stops. To match this ISO 15552 footprint for a direct replacement, verify the 155mm stroke, 40mm adjustment range, PT port thread, and specific mounting bracket.
Because the nominal stroke is 155mm, side-load stress is minimal, but the load should still be guided to prevent binding. If the machine requires the load to be held in place during a complete loss of air pressure, note that this standard SAIJ adjuster cannot perform that function; an external pilot-operated check valve or a related SAIL locking cylinder would be required.
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 SAIJ80X155-40 FAQ
At an operating pressure of 0.5 MPa, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At 0.9 MPa, the push force increases to 4523N.
The rear adjuster screw acts as an external stopper that allows you to shorten the effective travel from the nominal 155mm down to 115mm. It sets the physical end position but does not lock the load without live air pressure.
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