Airtac SAIJ80 Adjustable Cylinder SAIJ80BX425-40
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX425-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 425mm 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
- Stroke425 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 SAIJ80BX425-40
The AirTAC SAIJ80X425-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 385 to 425 mm, allowing you to dial back the nominal stroke by up to 40 mm during commissioning without adding external stops.
This variant features a SUS304 stainless steel rod for superior corrosion resistance in humid or washdown environments. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic sensors. Air cushions at both ends decelerate the load, but remember the rear adjuster is a travel stop, not a lock; for load-holding without live air, use an external rod lock or pilot-operated check valve.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX425-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX425-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 425 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 SAIJ80BX425-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×425 | 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 SAIJ80BX425-40 Is Used
Product Changeover Tuning
Quickly dial in the 385-425 mm retract end-stop during a packaging line format change without swapping out the entire cylinder.
Variable End-Stop Positioning
Adjust the stroke on the fly to hit slightly different retract positions for sorting diverter arms handling mixed product sizes.
Machine Setup Calibration
Fine-tune the final resting position of a heavy press fixture at commissioning to avoid machining custom external stopper blocks.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX425-40 the Right Cylinder?
Choose this adjustable-stroke model when a machine setup requires fine-tuning the retract end-position on the fly, such as during a product-size changeover, rather than relying on a fixed-stroke SAI cylinder. If your application needs less force, stepping down to a 63 mm bore yields 2182 N at 0.7 MPa. If you require more holding power, moving up to a 100 mm bore provides 5497 N.
Because the 425 mm stroke is relatively long, the 25 mm rod and M20x1.5 thread provide substantial rigidity, yet an external guide is still recommended to prevent side-loading damage. To match this ISO 15552 footprint exactly, verify the 80 mm bore, 425 mm stroke, 40 mm adjustment range, PT G3/8 ports, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, 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 SAIJ80BX425-40 FAQ
A rear external screw acts as a stopper, allowing you to shorten the effective stroke by up to 40 mm. This creates a usable travel window of 385 to 425 mm. The adjuster and the air cushions only set the travel end and deceleration; they do not hold the load without live air pressure.
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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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