Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-20S 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 SAIJ80BX500-20S
The AirTAC SAIJ80X500-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 500 mm travel back by up to 20 mm, yielding a highly precise 480-500 mm usable window. It delivers a robust 4523 N of push force at 0.9 MPa, utilizing a 25 mm carbon steel piston rod and a G3/8 port for optimal flow. This specific configuration incorporates a SUS304 stainless steel rod (option B) for superior corrosion resistance, includes a magnet for position sensing, and uses PT tapered port threads.
Because the stroke extends to 500 mm, an external guide rail is strongly recommended to prevent rod sag and absorb unintended side loads, as the 25 mm rod diameter has limits in supporting heavy cantilevered weights. The rear adjuster acts strictly as a mechanical stop to fine-tune the end position during commissioning; it does not lock or hold the load without continuous air pressure. For load-holding requirements, explore the SAIL or BSAI series instead. This model supports AirTAC CMSE reed and DMSE electronic sensors via the dual sensor grooves on the extruded aluminum barrel.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-20S |
|---|---|
| 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 SAIJ80BX500-20S
| 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 SAIJ80BX500-20S Is Used
Machine Changeover
Dial in the 480-500 mm stroke precisely during product size transitions without swapping the entire cylinder or adding external stopper blocks.
Variable End-Stop Positioning
Fine-tune the retract end-position on a 500 mm stroke conveyor diverting mechanism to accommodate varying package dimensions on the fly.
Corrosive Environment Assembly
Leverage the SUS304 stainless steel rod and 4523 N push force to execute long-travel pressing operations in washdown or corrosive manufacturing areas.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-20S the Right Cylinder?
Choose this 80 mm bore when your application requires significantly more thrust than the 50 mm bore (which offers 1767 N push at 0.9 MPa) but does not demand the massive 7068 N output of the 100 mm variant. The adjustable stroke is ideal for machine setups requiring variable end-stops or fine-tuning during product changeovers, preventing the need to physically swap out a fixed-stroke SAI cylinder.
When integrating this ISO 15552 dimensionally interchangeable cylinder, verify your mounting choice is compatible with the SAIJ supported set: Basic, FA, LB, TC, FTC, TCM1, or TCM2 (note that FB, CA, CB, and CR mounts are omitted from this adjustable series). Confirm the exact bore (80), stroke (500), adjustment (20), PT port thread, and magnet (-S) when matching it to an existing ISO 15552 footprint.
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 SAIJ80BX500-20S FAQ
At 0.9 MPa, this 80 mm bore cylinder provides 4523 N of push force and 2268 N of pull force. It operates at speeds between 30 and 800 mm/s.
A rear external screw stopper lets you shorten the 500 mm nominal stroke by up to 20 mm, creating a 480-500 mm adjustable travel window. This mechanical stop only sets the end position; it does not lock the load without live air pressure.
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