Airtac SAIJ80 Adjustable Cylinder SAIJ80X155-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X155-20 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 SAIJ80X155-20
The AirTAC SAIJ80X155-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 135 to 155 mm, allowing you to dial back the nominal 155 mm stroke by up to 20 mm during commissioning. Delivering a robust 2268 N pull force at 0.5 MPa, it handles heavy-duty positioning with ease.
This extruded aluminum profile cylinder includes variable air cushions at both ends and utilizes a PT tapered G3/8 port. The 25 mm carbon steel rod with an M20x1.5 thread provides excellent side-load capacity. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X155-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X155-20 |
|---|---|
| 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 SAIJ80X155-20
| 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 SAIJ80X155-20 Is Used
Machine Changeovers
Dial in the exact end-of-stroke position within the 135-155 mm window during product size transitions without physically replacing the actuator.
Heavy Positioning
Leverage the 2268 N pull force to move heavy fixtures, using the rear stopper to precisely set the retraction limit at commissioning.
Assembly Line Stops
Set variable retract stops for multi-format assembly lines, relying on the robust 25 mm rod to absorb end-impact shocks.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X155-20 the Right Cylinder?
Choose this 80 mm bore when your application requires more force than a 63 mm cylinder, which provides 1402 N pull at 0.5 MPa, but you do not need the massive 3681 N pull of a 100 mm unit. The adjustable stroke is ideal for product-size changeovers, letting you fine-tune the end position without swapping the cylinder or adding external stops. To match this ISO 15552 replacement, specify bore 80, stroke 155, 20 mm adjustment, PT G3/8 port, and your required mounting. Since the rear adjuster is a travel stop and not a lock, it will not hold the load without live air; for fail-safe 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 SAIJ80X155-20 FAQ
The rear adjuster screw acts as a mechanical stopper, allowing you to shorten the effective travel from 155 mm down to a minimum of 135 mm, providing a 20 mm tuning window.
At 0.5 MPa operating pressure, it provides 2513 N of push force and 2268 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 513 kgf.
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