Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-50S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 290mm 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
- Stroke290 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-50S
The AirTAC SAIJ50X290-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 290 mm travel by up to 50 mm. This creates a usable 240-290 mm end-position window, giving you precise control during machine commissioning or product changeovers without swapping the physical cylinder. It delivers 982 N of push force at 0.5 MPa and uses a SUS420J2 stainless steel rod for improved corrosion resistance.
Because the 290 mm stroke is relatively long, the 20 mm piston rod should be paired with an external guide to prevent excessive side-loading on the seals. The integrated -S magnet supports position sensing via AirTAC CMSE reed or DMSE electronic switches fitted into the dual sensor grooves. The rear adjuster acts purely as a mechanical stop for deceleration and does not lock the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-50S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 290 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 SAIJ50AX290-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×290 | 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 SAIJ50AX290-50S Is Used
Product Changeover
Dial in the 240-290 mm travel window during packaging line format changes to accommodate different carton sizes without replacing hardware.
End-Position Tuning
Fine-tune the retract stop during machine commissioning to perfect the alignment of tooling, avoiding the need for external mechanical stops.
Variable Stroke Diverter
Adjust the stroke on the fly for automated sorting gates that need to accommodate varying product lengths on a single conveyor line.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-50S the Right Cylinder?
Select this adjustable 50 mm bore model when your assembly requires variable end-stops rather than a fixed-stroke SAI cylinder. If your application demands higher thrust, stepping up to the 63 mm bore yields 1559 N at 0.5 MPa; if less force is needed, the 40 mm bore provides 628 N. Keep in mind that a plain SAIJ cylinder does not hold its position or load when air pressure is removed—the rear adjuster is a travel stop, not a brake. For true fail-safe load holding, consider an AirTAC SAIL or BSAI series.
This SAIJ50X290-50-S configuration includes a -S magnet for CMSE/DMSE sensors, a SUS420J2 stainless steel rod, and PT tapered port threads. It is dimensionally interchangeable per ISO 15552 and uses the standard SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR mounts.
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 SAIJ50AX290-50S 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 adjusting screw allows you to shorten the effective travel from the nominal 290 mm down to 240 mm. This provides a 240-290 mm usable window for fine-tuning the retract end position at commissioning without changing the cylinder.
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