Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-50S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 280mm 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
- Stroke280 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-50S
The AirTAC SAIJ50X280-50-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 adjustment range, creating a usable travel window between 230mm and 280mm. This allows you to dial in the exact retract end-position during commissioning without swapping out the cylinder.
Built with a SUS420J2 stainless steel rod (material code A) and PT tapered ports, this unit includes a magnet for position sensing. The extruded aluminum barrel houses sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic solid-state switches. It uses a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-50S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 280 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 SAIJ50AX280-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×280 | 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 SAIJ50AX280-50S Is Used
Product Changeover
Quickly adjust the 230-280mm travel window to accommodate different product lengths on the same production line without changing cylinder hardware.
End-Position Tuning
Fine-tune the retract stroke during machine commissioning to achieve precise mechanical stops, eliminating the need for external shims.
Assembly Station Setup
Dial in the exact clamping distance for varying part geometries, relying on the 982N push force at 0.5 MPa for reliable actuation.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-50S the Right Cylinder?
Choose this 50mm bore when you need 982N push force at 0.5 MPa (or 1767N at 0.9 MPa) with on-the-fly end-stop tuning. If your application requires less force, the 40mm bore offers 628N; if you need more, step up to the 63mm bore providing 1559N. An adjustable stroke is ideal for product changeovers, letting you fine-tune the travel window rather than installing a fixed-length SAI cylinder.
Because the nominal stroke is 280mm, ensure adequate external guiding to prevent excessive side-loading on the rod. The rear adjuster acts purely as a mechanical stop and does not hold the load without live air pressure; for fail-safe load holding, consider the SAIL or BSAI series. To match this ISO 15552 interchangeable cylinder exactly, specify the 50mm bore, 280mm stroke, 50mm adjustment, PT ports, SUS420J2 rod, and the -S magnet.
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 SAIJ50AX280-50S FAQ
At 0.5 MPa operating pressure, this 50mm bore cylinder provides 982N of push force and 825N of pull force. At 0.9 MPa, the push force increases to 1767N.
The rear adjuster screw allows you to shorten the effective stroke by up to 50mm. This creates a usable travel window of 230mm to 280mm, letting you set the exact retract end-position at commissioning without adding external stops.
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