Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80AX400-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ80 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 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 SAIJ80 Adjustable Cylinder SAIJ80AX400-20S
The AirTAC SAIJ80X400-20-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 400 mm nominal stroke that can be dialed back by up to 20 mm, creating a 380-400 mm usable travel window for precise end-position tuning.
This variant includes a magnet for position sensing and uses an SUS420J2 stainless steel rod for enhanced corrosion resistance. It features PT tapered port threads (G3/8) and an extruded aluminum barrel with sensor grooves on both sides. The rear adjuster acts strictly as a travel stop, meaning it decelerates the end of travel but will not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | — |
| Max (@1.0 MPa) | 463 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 SAIJ80 Adjustable Cylinder SAIJ80AX400-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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 SAIJ80 Adjustable Cylinder SAIJ80AX400-20S Is Used
Product Changeovers
Dial in the 380-400 mm travel window during line size changes to set new end positions without physically swapping cylinders.
Machine Setup
Fine-tune the rear stopper at commissioning to perfect the stroke length on long-stroke automated machinery.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20S the Right Cylinder?
Choose this 80 mm bore when you need more force than a 63 mm cylinder provides (1402 N pull at 0.5 MPa) but want to avoid the larger footprint of a 100 mm unit. The 20 mm adjustable stroke is ideal for machine setups requiring variable end-stops during product changeovers, eliminating the need to swap out a fixed-stroke SAI cylinder. For load-holding without continuous air pressure, use an SAIL or BSAI cylinder instead, as the SAIJ adjuster is not a lock.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 400 mm nominal stroke, 20 mm adjustment range, G3/8 PT ports, and the -S magnet requirement. Because the 400 mm stroke is relatively long, the 25 mm rod diameter should still be paired with an external guide to prevent excessive side-loading on the piston. Compatible mountings include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ80 Adjustable Cylinder SAIJ80AX400-20S FAQ
At 0.9 MPa, the push force increases to 4523 N.
The rear adjuster acts as a mechanical stop that can shorten the 400 mm nominal stroke by up to 20 mm, giving a usable travel window of 380-400 mm. It does not lock the load without live air.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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