Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-20
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-20 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 SAIJ50AX290-20
The AirTAC SAIJ50X290-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 290 mm stroke by up to 20 mm for a precise 270-290 mm usable travel window. It delivers a robust 982 N push force at 0.5 MPa, making it well-suited for medium-duty positioning tasks. The piston rod utilizes SUS420J2 stainless steel, enhancing rod durability and corrosion resistance compared to standard carbon steel.
This model features a PT tapered G1/4 port and achieves a standard operating speed of 30-800 mm/s. It shares the exact ISO 15552 mounting interface of the fixed-stroke SAI series but omits the FB, CA, CB, and CR mountings, offering a reduced subset of attachments (Basic, FA, LB, TC, FTC, TCM1, TCM2). The rear adjuster acts purely as a mechanical stop to fine-tune the retract end position during commissioning; it is not a locking device and will not hold the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-20 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-20 |
|---|---|
| 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 SAIJ50AX290-20
| 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 SAIJ50AX290-20 Is Used
Product Size Changeovers
Quickly fine-tune the retract end-position by up to 20 mm during production line changeovers to accommodate varying package lengths without replacing the cylinder.
Machine Setup Commissioning
Dial in the exact 270-290 mm travel window during initial machine commissioning to perfect part ejection or feeding distances without adding bulky external stops.
Variable End-Stop Positioning
Provide an adjustable physical stop for diverter arms on a conveyor line, allowing operators to adjust the stroke endpoint on the fly to route different product sizes.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-20 the Right Cylinder?
Select this 50 mm bore cylinder when your application requires a 270-290 mm stroke range and approximately 982 N of push force at 0.5 MPa. If your process demands less force, the 40 mm bore offers 628 N, whereas heavier loads necessitate stepping up to the 63 mm bore with its 1559 N output. The adjustable stroke is ideal for machine setups requiring variable end-stops or product-size changeovers, saving the cost of swapping out an entire fixed-stroke SAI cylinder.
Because the 290 mm stroke is substantial, the 16 mm rod diameter and M12x1.25 rod thread will experience increased side-loading leverage; an external guide rail is recommended to prevent premature seal wear. For any application requiring true load-holding without continuous air pressure, this cylinder is insufficient—consider the SAIL air-released lock or BSAI clamp-lock series instead. Ensure your setup matches the PT G1/4 port thread and utilizes the available SAIJ mounting subset.
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 SAIJ50AX290-20 FAQ
At a standard operating pressure of 0.5 MPa, this 50 mm bore cylinder provides a push force of 982 N and a pull force of 825 N. If you increase the pressure to 0.7 MPa, the push force rises to 1374 N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the nominal 290 mm stroke by up to 20 mm, creating a 270-290 mm usable travel window. It only sets the travel end and does not lock or hold the load without live air pressure.
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