Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 300mm 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
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-40S
The AirTAC SAIJ80X300-40-S is a double-acting ISO 15552 profile cylinder featuring a rear mechanical adjuster that trims the nominal 300 mm stroke back by up to 40 mm. This yields a usable travel window of 260-300 mm, allowing precise end-position tuning at commissioning without swapping the barrel or adding external stops. It delivers 2513 N of push thrust at 0.5 MPa, scaling to 4523 N at 0.9 MPa.
This bore uses a G3/8 port and a 25 mm carbon steel rod with an M20x1.5 thread, providing a robust interface that handles high side loads, though a 300 mm stroke still benefits from an external guide to prevent rod bending. The extruded aluminum barrel includes sensor grooves on both sides, and the -S magnet pairs directly with AirTAC CMSE reed and DMSE electronic switches for position feedback. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 300 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 SAIJ80X300-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×300 | 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 SAIJ80X300-40S Is Used
Variable End-Stop Positioning
Dial in the exact retraction point within the 260-300 mm window during machine setup, accommodating different material thicknesses without replacing hardware.
Product Changeover Systems
Quickly adjust the stroke end-position on packaging lines when switching to a new carton size, reducing downtime between production runs.
Heavy-Duty Clamping
Leverage up to 4523 N of thrust at 0.9 MPa to secure large workpieces, using the rear screw to fine-tune the clamp position without over-traveling.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-40S the Right Cylinder?
Choose this 80 mm bore when an application requires more force than the 63 mm class (1559 N at 0.5 MPa) but less than the 100 mm bore (3927 N at 0.5 MPa). The 40 mm adjustment range is ideal for machines that process varying product sizes, letting operators dial in the exact end-stop without changing the cylinder. For fixed-travel needs without commissioning adjustments, the standard SAI cylinder is a simpler alternative.
When specifying a replacement, match the 80 mm bore, 300 mm stroke, 40 mm adjuster, G3/8 PT ports, and the -S magnet. Remember that the rear adjuster acts only as a travel stop; it does not hold the load without live air pressure. For true 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 SAIJ80X300-40S FAQ
At 0.5 MPa it provides 2513 N of push force and 2268 N of pull force. At 0.9 MPa, the push force increases to 4523 N.
A rear mechanical screw acts as a stopper, allowing you to shorten the effective travel from 300 mm down to 260 mm. This adjuster sets the travel end-point but does not lock or hold the load without continuous air pressure.
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