Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-75S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX400-75S 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 SAIJ80BX400-75S
The AirTAC SAIJ80X400-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the extend position. With a 400 mm nominal stroke and a 75 mm adjustment range, it provides a usable travel window of 325 to 400 mm.
This unit is configured with a SUS304 stainless steel rod for superior corrosion resistance and a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides, and the -S magnet enables precise position detection using AirTAC CMSE reed or DMSE electronic solid-state switches. The rear adjuster acts purely as a mechanical stop to set the travel end and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-75S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-75S |
|---|---|
| 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 SAIJ80BX400-75S
| 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 SAIJ80BX400-75S Is Used
Product Changeover
Dial in the 325-400 mm travel window during line format changes to accommodate varying package lengths without replacing hardware.
Machine Setup
Use the rear stopper screw to fine-tune the final end-position during commissioning, avoiding the need for external shims.
Variable End Stops
Ideal for automated assembly lines where the rear stroke must be occasionally trimmed back to synchronize multiple actuators.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-75S the Right Cylinder?
An adjustable stroke is chosen over a fixed SAI cylinder when you need variable end-stops for product changeovers or commissioning fine-tuning without physically swapping the actuator. To replace this unit with an ISO 15552 equivalent, match the 80 mm bore, 400 mm stroke, 75 mm adjustment, PT port thread, and -S magnet.
Because the 400 mm stroke is substantial, the 25 mm rod diameter and M20x1.5 rod thread provide rigidity, but long unsupported strokes still require an external guide to prevent side-loading damage. Remember that the rear adjuster and air cushions only decelerate the travel end; for true load-holding without live pressure, consider the SAIL or BSAI series instead. Mounting options 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 SAIJ80BX400-75S FAQ
The rear adjuster screw lets you shorten the effective travel from its 400 mm nominal stroke down to 325 mm, providing a 75 mm adjustment window. This stopper sets the end position but does not lock the load without continuous air pressure.
It operates at speeds between 30 and 800 mm/s.
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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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