Airtac SAIJ50 Adjustable Cylinder SAIJ50AX900-20S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX900-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 900mm 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
- Stroke900 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 SAIJ50AX900-20S
The AirTAC SAIJ50X900-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that dials back the 900mm nominal travel by up to 20mm, creating an 880-900mm usable end-position window. It generates 982N of push thrust and 825N of pull thrust at 0.5 MPa, making it suitable for medium-force tasks. This variant includes a piston magnet for position detection and uses a SUS420J2 stainless steel rod (code A) for improved corrosion resistance compared to standard carbon steel.
Equipped with PT tapered ports (G1/4) and variable air cushions at both ends, it safely decelerates loads across its 30-800mm/s speed range. The extruded aluminum barrel integrates sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches. Because the 900mm stroke is long, an external guide is recommended to prevent excessive rod side-loading and premature seal wear.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX900-20S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX900-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 900 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 SAIJ50AX900-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×900 | 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 SAIJ50AX900-20S Is Used
Machine Changeovers
Dial in the 880-900mm stroke window during product format changes on automated lines, avoiding the need to physically swap out the entire cylinder.
Long-Travel Diverting
Drives extended conveyor sorting or push-off mechanisms where 900mm of travel is required, using the rear stopper to fine-tune the resting position.
Assembly Positioning
Moves medium-force fixtures along a 900mm path, relying on the DMSE solid-state sensors to confirm the adjusted end-of-stroke location.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX900-20S the Right Cylinder?
Choose this 50mm bore when an application requires 982N of push force at 0.5 MPa, which sits neatly below the 63mm bore (1559N) and above the 40mm bore (628N). An adjustable stroke is preferred over a fixed SAI cylinder when you need to fine-tune the exact end position during commissioning or accommodate minor product size changes without adding external physical stops. To match this ISO 15552 replacement exactly, specify the 50mm bore, 900mm stroke, 20mm adjustment, PT port thread, and the -S magnet option.
Remember that the rear adjuster acts purely as a travel stop to set the 880-900mm window and the air cushions handle deceleration; neither function will hold a load in place without live air pressure. For genuine load-holding requirements without continuous air supply, select an AirTAC SAIL (pneumatic lock) or BSAI (clamp-lock) cylinder instead.
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 SAIJ50AX900-20S FAQ
The rear adjuster screw acts as a mechanical stop that shortens the 900mm nominal stroke by up to 20mm, providing a usable travel window of 880-900mm. It allows you to fine-tune the end position during setup without changing the cylinder.
At 0.5 MPa operating pressure, the 50mm bore generates 982N of push force and 825N of pull force. It supports a standard operating speed range of 30-800 mm/s when properly regulated.
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