Airtac SAIJ40 Adjustable Cylinder SAIJ40AX20-20
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX20-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 20mm 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
- Stroke20 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 SAIJ40AX20-20
The AirTAC SAIJ40X20-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 20 mm stroke that can be dialed back by up to 20 mm, yielding a 0-20 mm usable travel window for precise end-position tuning during commissioning.
This variant uses a SUS420J2 stainless steel piston rod (option A) for improved corrosion resistance over standard carbon steel. The pneumatic supply connects via a PT tapered G1/4 port. Remember that the rear adjuster functions strictly as a mechanical stop to set the travel end and does not lock or hold the load without sustained live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX20-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX20-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 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 SAIJ40AX20-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 SAIJ40AX20-20 Is Used
Machine Changeover
Dial in the exact 0-20 mm retraction stop during product size changes without replacing the cylinder or bolting on external physical stops.
Variable End Stops
Use the 20 mm adjustment window to slightly alter the stroke endpoint on testing fixtures, compensating for slight variations in component thickness.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX20-20 the Right Cylinder?
The adjustable 0-20 mm window is ideal for product changeovers on a line, allowing you to fine-tune the retraction distance without physically swapping the cylinder or adding external stops. For any load-holding requirements without continuous air pressure, consider the SAIL or BSAI series instead.
When matching this ISO 15552 cylinder for a direct replacement, verify the 40 mm bore, 20 mm nominal stroke, 20 mm adjustment range, PT G1/4 port, and the specific mounting accessory (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Note that SAIJ omits the FB, CA, CB, and CR mounting formats found on some other profile cylinders.
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 SAIJ40AX20-20 FAQ
The SAIJ40X20-20 has a nominal 20 mm stroke with a rear adjuster that allows you to trim the effective travel back by up to 20 mm, creating a 0-20 mm usable stroke window. The adjuster acts as a travel stop and does not lock the load without live air pressure.
Authorized Export Seller
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.
Request a Quote for Airtac SAIJ40 Adjustable Cylinder SAIJ40AX20-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.