Airtac SAIJ40 Adjustable Cylinder SAIJ40AX280-20
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX280-20 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 SAIJ40AX280-20
The AirTAC SAIJ40X280-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down from 280 mm to a 260 mm minimum. This 20 mm adjustment window lets you dial in exact end positions during commissioning without adding external stops.
Built with an SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance, this model uses PT tapered port threads and operates at speeds between 30 and 800 mm/s. The extruded aluminum barrel includes sensor grooves on both sides, though this specific unit lacks the internal magnet required for CMSE or DMSE switches. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX280-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX280-20 |
|---|---|
| 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 SAIJ40AX280-20
| 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 SAIJ40AX280-20 Is Used
Machine Setup Tuning
Dial in the exact 260-280 mm end position during commissioning to perfectly align tooling without swapping out cylinders.
Product Changeover
Quickly adjust the stroke length on packaging lines when running different product sizes that require varied extension limits.
Variable End Stops
Use the rear stopper to set precise retraction depths for machining operations without fabricating custom external stops.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX280-20 the Right Cylinder?
The adjustable stroke is selected over a fixed SAI cylinder when you need variable end-stops for product changeovers or fine-tuning at machine setup.
Since the nominal stroke is 280 mm, an external guide is recommended to prevent side-load damage to the rod. Remember that the rear adjuster is a travel stop, not a lock; the cylinder will not hold its load without live air. For true load-holding without pressure, consider an external rod lock or the SAIL/BSAI series. ISO 15552 replacement requires matching the 40 mm bore, 280 mm stroke, 20 mm adjustment, PT port, and mounting style.
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 SAIJ40AX280-20 FAQ
At 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 280 mm nominal stroke by up to 20 mm, creating a usable travel window of 260-280 mm. It only sets the end position and does not lock the load without live air.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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