Airtac SAIJ50 Adjustable Cylinder SAIJ50AX50-20S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX50-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 50mm 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
- Stroke50 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 SAIJ50AX50-20S
The AirTAC SAIJ50X50-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 982N of push force at 0.5 MPa and features a 50mm nominal stroke that can be fine-tuned down by 20mm, providing a precise 30-50mm usable travel window for commissioning. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated magnet (-S) supports position detection.
This model is built with an SUS420J2 stainless steel rod (code A) for improved corrosion resistance and uses PT tapered port threads with a G1/4 connection. The rear adjustment screw acts purely as a mechanical stop to set the end position and relies on the variable air cushion for deceleration; it does not lock or hold the load without continuous air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX50-20S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX50-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 50 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 SAIJ50AX50-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×50 | 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 SAIJ50AX50-20S Is Used
Machine Changeover
Dial in the 30-50mm travel window during product size changes without physically swapping the cylinder or adding external stops.
End-Position Tuning
Fine-tune the retract end-position at commissioning to perfect the seating of a 982N press operation using the rear adjuster.
Sensor-Driven Stops
Leverage the integrated magnet with CMSE reed or DMSE electronic sensors to confirm position across the adjusted travel range.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX50-20S the Right Cylinder?
Choose this 50mm bore cylinder when an application requires 982N push force at 0.5 MPa but demands variable end-stop positioning during machine setup or product changeover. If your setup needs less force, stepping down to a 40mm bore yields 628N; if more thrust is required, a 63mm bore provides 1559N. The adjustable stroke prevents the need to swap cylinders for minor length tweaks, unlike a fixed SAI model.
For load-holding without live air pressure, this cylinder is insufficient because the rear adjuster is a travel stop, not a lock; consider an SAIL or BSAI cylinder instead. To match this ISO 15552 interchangeable unit exactly, specify the 50mm bore, 50mm stroke, 20mm adjustment, PT port thread, SUS420J2 rod, and the -S magnet option. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ50AX50-20S FAQ
At 0.5 MPa operating pressure, this 50mm bore cylinder provides 982N of push force and 825N of pull force. At 0.7 MPa, the push force increases to 1374N.
The rear adjuster screw allows you to shorten the 50mm nominal stroke by up to 20mm, creating a usable travel window of 30-50mm. It functions as a mechanical stop and does not hold the load without live air pressure.
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