Airtac SAIJ40 Adjustable Cylinder SAIJ40AX280-100
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX280-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 280mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ40 mm
- Stroke280 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- 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 SAIJ40 Adjustable Cylinder SAIJ40AX280-100
The AirTAC SAIJ40X280-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 280 mm travel back by up to 100 mm, yielding a usable 180-280 mm positioning window. The extruded aluminum barrel includes sensor grooves on both sides, and the rod is SUS420J2 stainless steel (code A) for enhanced corrosion resistance.
This model uses PT tapered G1/4 ports and reaches speeds of 30-800 mm/s. The rear adjuster acts purely as a mechanical stop to fine-tune the end position at commissioning without adding external stops; it does not lock the load without live air pressure. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR brackets.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX280-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX280-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 280 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 528 N | 528 N |
| 0.7 MPa | 739 N | — |
| Max (@1.0 MPa) | 108 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40AX280-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | 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 SAIJ40 Adjustable Cylinder SAIJ40AX280-100 Is Used
Machine Changeover
Dial in the 180-280 mm travel window during product size changes without swapping the entire cylinder or adding external stops.
Variable Stroke Stops
Adjust the stroke on the fly for packaging lines handling different box sizes, utilizing the 30-800 mm/s speed range.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX280-100 the Right Cylinder?
Choose this 40 mm bore adjustable-stroke cylinder when an application requires precise end-position tuning during setup or product changeover, rather than a fixed-stroke SAI cylinder. If your process needs less force, stepping down to a 32 mm bore yields 402 N at 0.5 MPa; if higher thrust is required, moving up to a 50 mm bore provides 982 N at 0.5 MPa. Because the nominal stroke is 280 mm, the 16 mm rod and M12x1.25 thread provide good rigidity, but an external guide is still recommended to manage side loads. To replace an ISO 15552 unit, match the 40 mm bore, 280 mm stroke, 100 mm adjustment, PT G1/4 port, and the appropriate mounting bracket. Note that for load-holding without live air, you should use a SAIL or BSAI cylinder, as the SAIJ adjuster is not a brake.
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 SAIJ40 Adjustable Cylinder SAIJ40AX280-100 FAQ
At 0.9 MPa, the push force increases to 1130 N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 280 mm nominal stroke by up to 100 mm, creating a usable 180-280 mm travel window. It only sets the end position and does not lock the load.
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Standard models are processed and dispatched in 3-5 business days.
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