Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 50mm 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
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-50S
The AirTAC SAIJ80X50-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end position. With a 50 mm nominal stroke and a 50 mm adjustment range, it provides a usable travel window of 0 to 50 mm, enabling exact end-stop tuning at commissioning without adding external stops. It delivers 2513 N of push thrust at 0.5 MPa, making it suitable for medium-force operations.
This variant includes a SUS304 stainless steel rod (code B) for enhanced corrosion resistance and pairs with a PT tapered port thread. The extruded aluminum barrel features sensor grooves on both sides, and the integrated magnet (-S) supports position detection via CMSE reed or DMSE electronic solid-state switches. The rear adjuster acts purely as a travel stop to set deceleration and end position, meaning it will not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 50 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 SAIJ80BX50-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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 SAIJ80BX50-50S Is Used
Commissioning End-Stop Tuning
Dial in the exact 0-50 mm retract position during machine setup without physically swapping cylinders or machining external stopper blocks.
Product Size Changeover
Quickly adjust the travel window on packaging lines when processing different product lengths, using the rear screw to set the new end position.
Medium-Force Positioning
Leverage the 2513 N push force at 0.5 MPa to move medium payloads while relying on the fine adjustment screw to prevent hard mechanical crashes.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-50S the Right Cylinder?
Choose this 80 mm bore cylinder when your application requires 2513 N of push force at 0.5 MPa, stepping up from a 63 mm bore that provides 1559 N. The 0 to 50 mm adjustable travel window is ideal for machine setups requiring variable end-stops or frequent product-size changeovers, replacing the need to swap out a fixed-stroke SAI cylinder. For load-holding without continuous air pressure, this cylinder is not sufficient as the adjuster is not a lock; you would need to look at the SAIL or BSAI series instead.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 50 mm stroke, 50 mm adjustment, PT port thread, and the -S magnet. The SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options. The 25 mm rod and M20x1.5 thread handle side loads well, though any long unsupported stroke still requires an external guide.
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 SAIJ80BX50-50S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push thrust and 2268 N of pull thrust. At 0.7 MPa, the push force increases to 3518 N.
The rear adjuster screw allows you to trim the effective stroke back by up to 50 mm. Since the nominal stroke is 50 mm, this creates a usable travel window of 0 to 50 mm. The adjuster acts as a mechanical stop to fine-tune the end position and is not a lock, so it cannot hold the load without live air pressure.
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