Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-75
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 125mm 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
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-75
The AirTAC SAIJ80X125-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 2513N of push force at 0.5 MPa. Its defining feature is a 75mm adjustment range that creates a highly flexible 50-125mm usable travel window. This allows operators to dial in the exact retract end-position during commissioning without swapping out the entire actuator or adding external stops.
Built with a robust 25mm carbon steel rod and M20x1.5 rod thread, the extruded aluminum barrel handles heavy loads while maintaining standard ISO 15552 mounting dimensions. The rear screw acts purely as a travel stop for deceleration alongside the standard air cushions, meaning it cannot hold a load without live air pressure. For position holding, an external pilot-operated check valve or a related SAIL lock cylinder is required.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-75 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 125 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 SAIJ80X125-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×125 | 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 SAIJ80X125-75 Is Used
Variable End-Stop Positioning
Ideal for assembly stations where the retract distance needs on-the-fly tuning within the 50-125mm window to accommodate different part dimensions without changing cylinders.
Machine Changeover Setup
Speeds up product line changeovers by allowing operators to mechanically adjust the end-stop via the rear screw, avoiding the need to reprogram fixed stroke cylinders.
Packaging Format Adjustment
Provides the 2513N push force needed to securely position heavy packaging materials, with the 75mm adjustment range allowing quick format changes between box sizes.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-75 the Right Cylinder?
Selecting this 80mm bore actuator makes sense when your machine requires substantial pull force (2268N at 0.5 MPa) but the exact retract distance varies by product format. The 75mm trim range provides immense setup flexibility, letting you fine-tune the 50-125mm travel window on the fly instead of machining custom spacers. If your application needs less force, stepping down to a 63mm bore yields 1559N push force, whereas moving up to a 100mm bore provides 3927N.
When matching this for an ISO 15552 replacement, verify the 125mm stroke, 75mm adjustment, PT tapered port thread, and standard carbon steel rod. The SAIJ series supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, intentionally omitting FB, CA, CB, and CR brackets. Because the total stroke is under 300mm, side-load stress on the 25mm rod is minimal, though external guiding remains best practice 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 SAIJ80X125-75 FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At 0.7 MPa, the push force increases to 3518N.
The rear adjuster screw allows you to trim the effective stroke back by up to 75mm from the nominal 125mm, creating a usable travel window of 50-125mm. The adjuster acts as a mechanical stop and does not lock the load without continuous air pressure.
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