Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-20
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX400-20 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 SAIJ80BX400-20
The AirTAC SAIJ80X400-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 400 mm travel with an integrated stopper that allows you to fine-tune the effective end position within a 380 to 400 mm usable window.
This specific configuration incorporates a SUS304 stainless steel piston rod for superior corrosion resistance and includes PT tapered port threads. The extruded aluminum barrel integrates dual sensor grooves, and while it lacks a standard magnet, the adjustable rear stopper functions purely as a travel limit. It relies on live air pressure to maintain force, as neither the adjuster nor the variable air cushions at both ends will hold a load statically.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-20 |
|---|---|
| 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 SAIJ80BX400-20
| 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 SAIJ80BX400-20 Is Used
Machine Setup & Changeover
Dial in the exact 380-400 mm end-stop during equipment commissioning or product size changes without physically swapping the cylinder.
Long-Stroke Positioning
Execute 400 mm travel strokes in automated lines, using the 25 mm rod and external guides to maintain stability across the extended length.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-20 the Right Cylinder?
The adjustable stroke is chosen over a fixed SAI cylinder when you need precise end-position tuning during commissioning or product changeover without adding external stops. To match this ISO 15552 replacement exactly, specify: 80 mm bore, 400 mm stroke, 20 mm adjustment range, PT G3/8 port, Basic/FA/LB/TC/FTC/TCM1/TCM2 mountings, and no magnet. Because the 400 mm stroke is long, the 25 mm rod diameter handles side loads well, but an external guide rail is still recommended to prevent rod wear. For load-holding without live pressure, use an external rod lock or pilot-operated check valve, or select a SAIL or BSAI cylinder.
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 SAIJ80BX400-20 FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from the nominal 400 mm down to 380 mm. It only sets the end position and does not lock the load; live air pressure is required to hold position.
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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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