Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-50 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 SAIJ80X300-50
The AirTAC SAIJ80X300-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the 300 mm nominal stroke by up to 50 mm, creating a 250-300 mm usable travel window. It delivers a 0.5 MPa push force of 2513 N and a pull force of 2268 N, making it suitable for heavy-duty positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides for straightforward detection integration.
Equipped with a 25 mm carbon steel rod and an M20x1.5 thread, this unit handles substantial side loads, though the 300 mm stroke length means an external guide is recommended to prevent rod deflection. The rear adjuster acts purely as a mechanical stop for fine-tuning end positions during commissioning or product changeovers. It does not lock the load without live air pressure, so applications requiring true load-holding should utilize an external pilot-operated check valve or explore the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-50 |
|---|---|
| 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 SAIJ80X300-50
| 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 SAIJ80X300-50 Is Used
Product Changeover Adjustment
Dial in the 250-300 mm stroke window during line changeovers to accommodate different product sizes without replacing hardware.
End-Position Tuning
Fine-tune the retract end-stop during machine commissioning to achieve precise mechanical positioning without adding external stops.
Variable Stroke Diverter
Act as a diverter or gate on a conveyor system where the exact stopping point of the 300 mm stroke must be adjusted on the fly.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-50 the Right Cylinder?
Choose this adjustable-stroke model when a machine setup requires variable end-stops or frequent product changeovers, allowing you to dial in the exact 250-300 mm travel distance without swapping out the entire cylinder or adding external stopper blocks. If your application requires less force, stepping down to a 63 mm bore yields a 1559 N push force at 0.5 MPa. Conversely, moving up to a 100 mm bore provides 3927 N.
For replacement matching, verify the 80 mm bore, 300 mm stroke, 50 mm adjustment range, PT tapered port thread (G3/8 size), and the required mounting style. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, explicitly omitting FB, CA, CB, and CR brackets. Because no magnet is specified, this unit will not work with CMSE or DMSE sensors without modification.
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 SAIJ80X300-50 FAQ
At 0.5 MPa, this 80 mm bore cylinder provides a push force of 2513 N and a pull force of 2268 N. It operates at speeds between 30 and 800 mm/s.
The rear adjuster screw allows you to shorten the 300 mm nominal stroke by up to 50 mm, providing a usable travel window of 250-300 mm. This stopper fine-tunes the end position but does not hold the load without live air pressure.
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