Airtac SAIJ80 Adjustable Cylinder SAIJ80X155-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X155-50 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 SAIJ80X155-50
The AirTAC SAIJ80X155-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 105-155 mm usable travel window. It delivers 2513 N of push thrust and 2268 N of pull force at 0.5 MPa, making it suitable for moderately heavy handling. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This model uses a 25 mm carbon steel rod with an M20x1.5 thread, paired with PT (tapered) porting at G3/8. The rear adjustment mechanism allows you to dial back the stroke by up to 50 mm during commissioning or product changeover, eliminating the need to swap the cylinder or bolt on external stops. It supports a speed range of 30-800 mm/s and includes variable air cushions at both ends to decelerate the payload smoothly.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X155-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X155-50 |
|---|---|
| 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 SAIJ80X155-50
| 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 SAIJ80X155-50 Is Used
Machine Changeover
Dial in the 105-155 mm travel window during product size changes without physically swapping out the cylinder or adding external mechanical stops.
End-Position Tuning
Fine-tune the retract end position at commissioning to absorb mechanical tolerance stacks and achieve precise placement of 2513 N payloads.
Variable Diverter Stops
Adjust the stroke length on the fly for conveyor diverter arms that need to accommodate different package sizes on a single processing line.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X155-50 the Right Cylinder?
Choose this adjustable-stroke unit over a fixed SAI when your machine setup requires variable end-stop positioning or frequent product-size changeovers. If your application demands less force, stepping down to a 63 mm bore yields 1402 N of pull force at 0.5 MPa; conversely, moving up to a 100 mm bore provides 3681 N of pull force for heavier loads. To replace an ISO 15552 cylinder, match the 80 mm bore, 155 mm stroke, 50 mm adjustment range, G3/8 PT ports, and mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). A magnet for CMSE reed or DMSE electronic sensors is not included on this base model.
Because the nominal stroke is 155 mm, side-load risks are moderate, but you should still ensure proper guiding for unsupported loads. Remember that the rear adjuster acts only as a travel stop to set the end position and does not hold the load without live air pressure. For true load-holding without continuous air, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ80X155-50 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 pressure of 1.0 MPa, it can deliver up to 513 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 155 mm nominal stroke by up to 50 mm, creating a usable travel window of 105-155 mm. It functions alongside the air cushions to decelerate the load, but it is not a lock and will not hold the load without live air pressure.
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