Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-75S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-75S 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 SAIJ50AX280-75S
The AirTAC SAIJ50X280-75-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 generous 75mm adjustment range, creating a usable travel window between 205 and 280mm. This built-in flexibility allows you to dial in the exact retract end-position during commissioning without swapping hardware.
This specific SKU is configured with an SUS420J2 stainless steel rod (code A) for improved corrosion resistance and includes a magnet (-S) for position sensing. The extruded aluminum barrel houses sensor grooves on both sides, ready to accept AirTAC CMSE reed or DMSE electronic solid-state switches. Fluid ports are PT threaded, and the standard G1/4 port size matches the 50mm bore class.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-75S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-75S |
|---|---|
| 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 SAIJ50AX280-75S
| 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 SAIJ50AX280-75S Is Used
Product Changeover
Quickly reposition the retract end-stop within the 205-280mm window when switching between product sizes on a packaging line.
Machine Setup
Fine-tune the final resting position during commissioning without machining external stop blocks or changing the cylinder.
Variable End Stops
Dial in the exact clamping depth on automated fixtures where multiple material thicknesses require different travel endpoints.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-75S the Right Cylinder?
Choose this 50mm bore when an application requires around 982N push force at 0.5 MPa, stepping up from a 40mm bore (628N) if you need extra thrust, or down from a 63mm bore (1559N) to save space. The 75mm adjustment window is ideal for product-size changeovers on a line, letting you reposition the retract stop quickly instead of adding external stops or buying a fixed-stroke SAI cylinder. Because the stroke is 280mm, ensure an external guide supports the load to prevent excessive side-loading on the rod.
To match this ISO 15552 dimensionally interchangeable cylinder, confirm the 50mm bore, 280mm nominal stroke, 75mm adjustment, PT ports, and the -S magnet. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
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 SAIJ50AX280-75S FAQ
At 0.5 MPa operating pressure, this 50mm bore cylinder provides 982N of push force and 825N of pull force. It can reach up to 1767N push force at 0.9 MPa.
The rear adjuster screw lets you shorten the effective stroke by up to 75mm. This creates a usable travel window from 205mm to 280mm, allowing you to set the exact retract position without replacing the cylinder.
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