Airtac SAIJ80 Adjustable Cylinder SAIJ80X400-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X400-20S 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 a drop-in replacement for other ISO 15552 cylinders in automation lines.
- 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 SAIJ80X400-20S
The AirTAC SAIJ80X400-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 380 to 400 mm, allowing you to dial back the nominal 400 mm stroke by up to 20 mm during commissioning. In the 80 mm bore class, it generates 2513 N of push force and 2268 N of pull force at 0.5 MPa.
This unit includes a standard carbon steel rod and a -S magnet for position sensing. The extruded aluminum barrel integrates sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic solid-state switches. You can fine-tune end positions at the machine without adding external stops, and the PT tapered ports ensure a tight pneumatic seal.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X400-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X400-20S |
|---|---|
| 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 | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80X400-20S
| 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 SAIJ80X400-20S Is Used
Machine Changeover
Fine-tune the 380-400 mm travel window during product size transitions on packaging lines without disassembling the cylinder mount.
Variable End Stops
Set precise rear retract positions for diverter arms on conveyors, adjusting the 20 mm range to accommodate varying package lengths.
Assembly Pressing
Apply up to 2513 N of push force at 0.5 MPa for seating components, using the rear screw to dial in the exact contact depth.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X400-20S the Right Cylinder?
Select this 80 mm bore model when your application requires the 2513 N push force at 0.5 MPa, which sits between the 63 mm bore (1559 N) and the 100 mm bore (3927 N). The adjustable stroke is ideal for product changeovers where exact end-of-travel limits must shift by a few millimeters without swapping out a fixed-stroke SAI cylinder.
Because the stroke is 400 mm, you must use an external guide to prevent excessive side loading on the 25 mm rod and M20x1.5 thread. For load-holding without live air pressure, note that the rear adjuster acts only as a travel stop, not a lock; you would need an SAIL or BSAI cylinder instead. This SAIJ model uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and is dimensionally interchangeable per ISO 15552.
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 SAIJ80X400-20S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. It can reach up to 4523 N push force at 0.9 MPa.
The rear adjuster screw lets you shorten the effective travel from the nominal 400 mm down to 380 mm. This creates a 20 mm tuning window to set exact end positions without adding external stops, though it acts as a stop and does not hold the load without live air.
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Covers non-human-caused product damage.
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