Airtac SAIJ80 Adjustable Cylinder SAIJ80AX300-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX300-40 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 SAIJ80AX300-40
The AirTAC SAIJ80X300-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. With a nominal 300 mm stroke and a 40 mm adjustment range, it provides a usable travel window of 260-300 mm, allowing you to dial in the exact retract position during commissioning without adding external stops. It delivers a robust 2513 N pull force at 0.5 MPa and utilizes a 25 mm SUS420J2 stainless steel piston rod (material code A) with an M20x1.5 thread, which handles side loads far better than smaller rods.
This model features PT tapered port threads (G3/8) and operates at speeds of 30-800 mm/s. It uses the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting the FB, CA, CB, and CR brackets. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU is built without a magnet, so it requires external sensing if position detection is needed.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX300-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX300-40 |
|---|---|
| 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 SAIJ80AX300-40
| 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 SAIJ80AX300-40 Is Used
Product Changeovers
Dial in the retract stopper by up to 40 mm during format changes on a packaging line, avoiding the need to physically swap out cylinders for different package sizes.
Machine Commissioning
Fine-tune the end-of-stroke position during initial setup to perfect alignment, using the rear screw to hit an exact 260-300 mm travel window without external shims.
Assembly Pressing
Apply up to 2513 N of pulling force at 0.5 MPa for seating components, using the adjustable stopper to prevent over-travel and damage to delicate parts.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX300-40 the Right Cylinder?
Choose this 80 mm bore cylinder when an application requires high thrust (up to 2513 N pull at 0.5 MPa) and on-the-fly end-position tuning. Stepping down to a 63 mm bore drops the pull force to 1402 N, while stepping up to a 100 mm bore increases it to 3681 N. The adjustable stroke is ideal for product changeovers on a line, letting operators fine-tune the retract stopper instead of physically swapping a fixed-stroke SAI cylinder.
Because the stroke is 300 mm, the extended rod is subject to leverage; an external guide rail is recommended to prevent binding under heavy offset loads. Note that the rear adjuster acts purely as a travel stop and does not hold the load without live air pressure. For true fail-safe load holding, select a SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead. To match this ISO 15552 replacement exactly, specify: 80 mm bore, 300 mm stroke, 40 mm adjustment, PT G3/8 port, and no magnet.
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 SAIJ80AX300-40 FAQ
At a standard 0.5 MPa operating pressure, this 80 mm bore cylinder generates 2513 N of pull force and 3518 N of push force. It can reach a maximum push force of 4523 N at 0.9 MPa.
The rear adjuster screw acts as a mechanical stopper that lets you shorten the nominal 300 mm stroke by up to 40 mm, creating a usable travel window of 260-300 mm. It is a travel stop, not a lock, and the cylinder requires live air to maintain its position.
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