Airtac SAIJ80 Adjustable Cylinder SAIJ80X145-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X145-20S 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 SAIJ80X145-20S
The AirTAC SAIJ80X145-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers 2513N of push force at 0.5 MPa and provides a usable travel window of 125 to 145 mm. The PT tapered port threads and standard carbon steel rod make it a robust choice for medium-force tasks.
This model includes a magnet for position sensing, supporting AirTAC CMSE reed and DMSE electronic switches. The rear adjuster acts purely as a mechanical stop for end-position tuning and does not hold the load without live air pressure. It uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR options.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X145-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X145-20S |
|---|---|
| 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 SAIJ80X145-20S
| 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 SAIJ80X145-20S Is Used
Machine Changeover
Fine-tune the 125-145mm travel window during product size changes on a packaging line without physically swapping the actuator.
End-Position Tuning
Dial in the exact retract stop during initial commissioning to compensate for mechanical tolerances in your fixture.
Medium-Force Clamping
Apply up to 2513N of clamping force at 0.5 MPa on machining fixtures where the exact clamping distance varies slightly.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X145-20S the Right Cylinder?
Choose this 80mm bore when you need more force than a 63mm cylinder (1559N at 0.5 MPa) but less than a 100mm bore (3927N). The 20mm adjustment range is ideal for machine changeovers, letting you dial in the retract end position without swapping cylinders or adding external stops. For load-holding without continuous air pressure, select a SAIL or BSAI cylinder instead, as the SAIJ adjuster is not a lock.
When replacing an ISO 15552 cylinder, match the 80mm bore, 145mm stroke, 20mm adjustment, G3/8 PT port, and -S magnet. The 25mm rod and M20x1.5 thread handle high side loads well, but with a 145mm stroke, you should still use an external guide for heavy lateral loads.
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 SAIJ80X145-20S FAQ
At 0.5 MPa operating pressure, 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 acts as a mechanical stop, allowing you to shorten the 145mm nominal stroke by up to 20mm, creating a 125-145mm usable travel window. It only sets the end position and does not lock the load.
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