Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-30
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-30 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
- 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 SAIJ50AX280-30
The AirTAC SAIJ50X280-30 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 280 mm stroke that can be fine-tuned backward by up to 30 mm, creating a precise 250-280 mm usable travel window. Delivering 982 N of push force at 0.5 MPa, it handles mid-range automation tasks with ease.
This variant utilizes a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance and features PT tapered port threads (G1/4). The extruded aluminum barrel includes sensor grooves on both sides, allowing for the direct mounting of AirTAC CMSE reed or DMSE electronic sensors if a magnet is specified later. The rear adjuster functions strictly as a mechanical stop to dial in the retract end position during commissioning without adding external stops.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-30 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-30 |
|---|---|
| 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 SAIJ50AX280-30
| 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 SAIJ50AX280-30 Is Used
Product Changeover
Dial in the 250-280 mm travel window during format changes on packaging lines, using the rear screw to set exact retract distances without replacing hardware.
End-Position Calibration
Fine-tune the final retract position during machine commissioning to avoid mechanical hard stops, leveraging the 30 mm adjustment range for optimal placement.
Variable Diverter Stops
Adjust the stroke end-point on the fly for conveyor sorting arms handling different package sizes, ensuring precise physical contact without reprogramming.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-30 the Right Cylinder?
Choose this 50 mm bore when your application requires approximately 982 N of push force at 0.5 MPa, stepping up from a 40 mm bore (628 N) or down from a 63 mm bore (1559 N). The adjustable 250-280 mm travel window is ideal for machine setups requiring product changeovers or exact end-position tuning without swapping out the entire cylinder for a fixed-stroke SAI model. Because the stroke is 280 mm, ensure adequate external guiding to prevent excessive rod side-loading.
For a true ISO 15552 replacement, match the 50 mm bore, 280 mm stroke, 30 mm adjustment code, PT port threads, and your required mounting accessory. Note that SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. The rear adjuster and air cushions only decelerate the load; they do not hold position without live air, so consider an AirTAC SAIL or BSAI locking cylinder if fail-safe load holding is required.
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 SAIJ50AX280-30 FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At 0.7 MPa, the push force increases to 1374 N.
The rear adjuster acts as a mechanical stop that allows you to shorten the effective stroke from its nominal 280 mm down to 250 mm. It is used for fine-tuning the end position at commissioning and is not a locking mechanism.
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