Airtac SAIJ50 Adjustable Cylinder SAIJ50AX500-20
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX500-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 500mm 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
- Stroke500 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 SAIJ50AX500-20
The AirTAC SAIJ50X500-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to fine-tune the effective travel down to a 480-500 mm window. Delivering 982 N of push force at 0.5 MPa, it is equipped with a SUS420J2 stainless steel rod for superior corrosion resistance and a PT tapered port thread for a robust pneumatic seal. The extruded aluminum barrel integrates sensor grooves on both sides for flexible switch placement.
Because the rear adjuster acts purely as a mechanical stop, it decelerates the piston alongside the standard air cushions but does not lock the load without live air pressure. For applications requiring position holding, you would need to specify a SAIL or BSAI variant. This 50 mm bore model uses a 20 mm rod and M16x1.5 thread, providing a solid balance of thrust and side-load capacity for mid-range automation tasks.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX500-20 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX500-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 500 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 SAIJ50AX500-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×500 | 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 SAIJ50AX500-20 Is Used
Product Changeover
Dial in the 480-500 mm travel window during line changeovers to accommodate slightly different package sizes without swapping out the entire actuator.
End-Stop Calibration
Fine-tune the final retract position during machine commissioning, using the rear screw to hit exact dimensional tolerances without external shims.
Material Handling
Drive long-travel sorting gates or diverters where the 982 N thrust at 0.5 MPa easily overcomes friction on heavy pallets, with a built-in stop for timing adjustments.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX500-20 the Right Cylinder?
Choose this 50 mm bore when your application requires around 982 N of push force at 0.5 MPa; stepping down to a 40 mm bore drops the force to 628 N, while stepping up to a 63 mm bore increases it to 1559 N. The adjustable stroke is selected over a fixed SAI model when you need to dial in the exact end position during machine commissioning or product changeover without adding external stops. To replace an ISO 15552 cylinder, match the 50 mm bore, 500 mm stroke, 20 mm adjustment, PT port, and required mounting from the SAIJ set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that SAIJ omits FB, CA, CB, and CR mounts.
With a 500 mm stroke, the 20 mm rod is subject to increased bending moments under side loads. Even though the rod diameter and M16x1.5 thread handle standard operational stresses well, you must use an external guide to prevent rod deflection and premature seal wear over this long travel distance.
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 SAIJ50AX500-20 FAQ
The rear adjuster screw allows you to shorten the effective travel by up to 20 mm, creating a 480-500 mm usable stroke window. It acts as a mechanical stop to set the end position precisely during commissioning, but it is not a locking device and requires live air pressure to hold the load.
At a 0.5 MPa operating pressure, the SAIJ50X500-20 provides 982 N of push force and 825 N of pull force. At the maximum 1.0 MPa pressure, the push force reaches 1964 N.
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