Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-50
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 550mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ50 mm
- Stroke550 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-50
The AirTAC SAIJ50X550-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 500 to 550 mm, allowing you to dial back the end position by up to 50 mm during machine setup without swapping out the physical actuator. Delivering 982 N of push force and 825 N of pull force at 0.5 MPa, it fits mid-range automation tasks perfectly.
This specific SKU is configured with a SUS304 stainless steel rod for superior corrosion resistance in humid or washdown environments. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches, and the PT tapered ports ensure a tight, reliable pneumatic connection.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-50 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 550 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max stroke | Up to 1200 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×550 | 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 SAIJ50 Adjustable Cylinder SAIJ50BX550-50 Is Used
Variable End-Stop Machining
Fine-tune the 500 to 550 mm travel window to accommodate different part lengths on a machining line without physically replacing the cylinder or adding external shims.
Product Changeover Diverters
Quickly adjust the retract stroke by up to 50 mm during packaging line changeovers to handle varying package sizes, ensuring precise downstream diverting.
Corrosive Environment Handling
Leverage the SUS304 stainless steel rod for pushing or lifting tasks in food processing or chemical washdown areas where standard carbon steel rods would fail.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-50 the Right Cylinder?
Choose this 50 mm bore actuator when your application requires 982 N of thrust at 0.5 MPa, but a smaller 40 mm bore (628 N) would be underpowered, and a larger 63 mm bore (1559 N) would be excessive. The 50 mm adjustment range is ideal for product changeovers where end-of-stroke positions vary slightly. Remember that the rear adjuster is a travel stop, not a locking mechanism; this plain SAIJ cylinder will not hold a load without live air pressure. For fail-safe load holding, consider the SAIL or BSAI series.
Because the 550 mm stroke is quite long, the 20 mm diameter rod is highly susceptible to side-loading and sagging. To prevent premature seal wear and binding, always guide the load externally using linear rails or guide rods rather than relying on the piston rod alone. When replacing an ISO 15552 cylinder, match the 50 mm bore, 550 mm stroke, PT G1/4 ports, and your required mounting hardware from the SAIJ set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
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 SAIJ50 Adjustable Cylinder SAIJ50BX550-50 FAQ
At a 0.5 MPa operating pressure, this 50 mm bore cylinder generates 982 N of push force and 825 N of pull force. It can reach up to 1767 N of push force at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from 550 mm down to 500 mm. This provides a 50 mm tuning window for commissioning without needing to remove the cylinder or add external stops.
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