Airtac SAIJ50 Adjustable Cylinder SAIJ50BX270-50
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX270-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 270mm 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
- Stroke270 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 SAIJ50BX270-50
The AirTAC SAIJ50X270-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 220-270 mm usable travel window, allowing you to dial back the 270 mm nominal stroke by up to 50 mm during machine commissioning. In the 50 mm bore class, it delivers 982 N of push force and 825 N of pull force at 0.5 MPa.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. The rear adjuster functions purely as a travel stop to set the end position and does not lock the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX270-50 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX270-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 270 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 SAIJ50BX270-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×270 | 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 SAIJ50BX270-50 Is Used
Machine Commissioning
Dial in the exact 220-270 mm end-stop during initial setup to perfect the gripping position without machining external spacers.
Product Size Changeover
Quickly adapt the travel distance on a packaging line when switching between different carton sizes by turning the rear adjuster.
Variable End-Stop Positioning
Set precise retract positions for assembly presses that need slight travel adjustments for different material thicknesses.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX270-50 the Right Cylinder?
Choose this 50 mm bore adjustable cylinder when your setup requires fine-tuning of the end-of-stroke position without swapping out physical hardware. If your application demands less force, stepping down to a 40 mm bore yields 628 N of push at 0.5 MPa. If you need more power, moving up to a 63 mm bore provides 1559 N. Because the 270 mm stroke is over 300 mm when combined with the maximum adjustment, an external guide rail is recommended to prevent excessive side-loading on the rod.
The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, intentionally omitting FB, CA, CB, and CR options. If your design requires the load to be held mechanically in place without continuous air pressure, this cylinder is not suitable; consider the AirTAC SAIL or BSAI series instead. For direct replacements, match the 50 mm bore, 270 mm stroke, 50 mm adjustment, PT port, and SUS304 rod material.
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 SAIJ50BX270-50 FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 200 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 270 mm nominal stroke by up to 50 mm, creating a 220-270 mm travel window. It only sets the end position and does not lock the load without live air pressure.
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