Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 500mm 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
- Stroke500 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-20
The AirTAC SAIJ80X500-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 500 mm travel with an integrated stopper that allows you to trim the effective stroke back by up to 20 mm, creating a precise 480-500 mm usable window for fine-tuning end positions at commissioning. Belonging to the 80 mm bore class, it delivers robust thrust up to 4523 N at 0.9 MPa.
This variant uses a SUS304 stainless steel rod for superior corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets. The rear adjuster acts purely as a travel stop to set deceleration, not as a lock to hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 500 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 SAIJ80BX500-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×500 | 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 SAIJ80BX500-20 Is Used
Machine Commissioning Tuning
Dial in the exact end-of-stroke position during setup using the 480-500 mm adjustment window, eliminating the need to machine custom external stopper blocks.
Product Size Changeover
Quickly adapt the travel distance on a packaging line to accommodate varying package lengths by trimming the stroke up to 20 mm.
Long-Stroke Assembly Press
Leverage the 80 mm bore thrust and 500 mm travel for large actuation tasks, fine-tuning the final contact position to avoid over-travel damage.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-20 the Right Cylinder?
Selecting this 80 mm bore model provides a pull force of 2268 N at 0.5 MPa, stepping up from a 63 mm bore that offers 1402 N. The adjustable 480-500 mm travel window is chosen over a fixed-stroke SAI cylinder when a machine requires variable end-stops or product-size changeovers without swapping out the entire actuator. For exact ISO 15552 replacement matching, verify the 80 mm bore, 500 mm stroke, 20 mm adjustment, PT port thread, and the standard mounting set.
Because the 500 mm stroke is relatively long, the 25 mm rod diameter should be paired with an external guide to prevent excessive side-loading and premature seal wear. If the application requires the cylinder to hold its position without live air pressure, the rear adjuster will not suffice; instead, consider an AirTAC SAIL pneumatic lock, BSAI clamp-lock, or an external pilot-operated check valve.
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 SAIJ80BX500-20 FAQ
This 80 mm bore cylinder delivers a push force of 2513 N at 0.5 MPa and 4523 N at 0.9 MPa. The pull force is 2268 N at 0.5 MPa.
The rear adjuster screw allows you to shorten the nominal 500 mm stroke by up to 20 mm, providing a usable travel window of 480-500 mm. It functions as a mechanical stop to set the end position and deceleration, not as a lock to hold the load without air pressure.
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