Airtac SAIJ50 Adjustable Cylinder SAIJ50AX210-20S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX210-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 210mm 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
- Stroke210 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 SAIJ50AX210-20S
The AirTAC SAIJ50X210-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 190-210mm usable travel window. Delivering 982N of push force at 0.5 MPa, it is equipped with a SUS420J2 stainless steel rod for improved corrosion resistance and a PT tapered port thread.
This adjustable-stroke variant allows you to fine-tune the retract end position at commissioning without swapping the cylinder or adding external stops. The integrated -S magnet works seamlessly with AirTAC CMSE reed and DMSE electronic sensors, which seat cleanly into the extruded aluminum barrel's dual sensor grooves.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX210-20S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX210-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 210 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 SAIJ50AX210-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×210 | 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 SAIJ50AX210-20S Is Used
Changeover Calibration
Dial in the 190-210mm travel window during product size changes on a packaging line without replacing the entire cylinder.
End-Stop Tuning
Fine-tune the retract position during initial machine commissioning to perfect a pressing or clamping operation.
Variable Positioning
Adjust the rear stopper to synchronize multi-stage assembly stations that require slightly different retraction depths.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX210-20S the Right Cylinder?
Choose this 50mm bore when an application requires dialing in a precise end-stop during machine setup or product changeover, stepping up from a 40mm bore (628N push at 0.5 MPa) if you need extra force. The rear adjuster acts solely as a travel stop and does not hold the load without live air; for true pneumatic locking, select the SAIL or BSAI series. This SAIJ model uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. Because the 210mm stroke approaches the mid-range of standard travel, always verify that external side-load guides are sufficient for your piston rod diameter.
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 SAIJ50AX210-20S FAQ
At 0.5 MPa, this 50mm bore cylinder provides 982N of push force and 825N of pull force. The -20 adjustment code allows you to shorten the 210mm nominal stroke by up to 20mm, resulting in a 190-210mm usable travel window.
No, the rear adjuster functions only as a travel stop to set the end position and cannot hold a load without continuous live air pressure. For true fail-safe load holding, you must use an external rod lock or switch to the AirTAC SAIL or BSAI cylinder series.
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Covers non-human-caused product damage.
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