Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-20S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX400-20S 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 SAIJ80BX400-20S
The AirTAC SAIJ80X400-20-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. The integrated -20mm adjustment mechanism allows you to fine-tune the effective travel within a 380-400mm window without adding external stops.
This unit includes a magnetic piston for electronic DMSE or reed CMSE sensors and uses variable air cushions at both ends to manage deceleration. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. The external adjuster acts purely as a travel stop, so it will not hold a load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-20S |
|---|---|
| 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 SAIJ80BX400-20S
| 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 SAIJ80BX400-20S Is Used
Variable End-Stop Tuning
Dial in the exact 380-400mm retract position during commissioning to accommodate varying material thicknesses without machining new hard stops.
Product Size Changeover
Quickly adjust the stroke end-point on packaging lines when switching between different package lengths, minimizing machine downtime.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-20S the Right Cylinder?
Choose this adjustable model when you need precise end-position tuning during machine setup or product changeover, avoiding the need to swap out a fixed-stroke SAI cylinder. If your application requires less force, stepping down to a 63mm bore yields 1402N pull at 0.5 MPa; stepping up to a 100mm bore provides 3681N pull. Because the 400mm stroke creates a long lever arm on the 25mm rod, an external guide is recommended to prevent excessive side-loading.
For a true ISO 15552 replacement, match the 80mm bore, 400mm stroke, PT G3/8 port, SUS304 rod, and the -S magnet. Remember that the rear screw and air cushions only set the travel end; they do not function as a brake. For load-holding without live pressure, consider an external pilot-operated check valve or AirTAC SAIL and BSAI locking 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 SAIJ80 Adjustable Cylinder SAIJ80BX400-20S FAQ
A rear-mounted adjusting screw acts as an external stopper, allowing you to shorten the 400mm nominal stroke by up to 20mm. This creates a usable travel window of 380-400mm, enabling fine-tuning of the retract end-position at commissioning without replacing the cylinder.
At 0.9 MPa, the push force increases to 4523N. Note that the rear adjuster only sets the travel end and does not lock or hold the load without continuous 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 SAIJ80 Adjustable Cylinder SAIJ80BX400-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.