Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-75S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX250-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 250mm 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
- Stroke250 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 SAIJ80BX250-75S
The AirTAC SAIJ80X250-75-S is a double-acting, double-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. This built-in adjustability allows operators to dial in exact end positions during commissioning without adding external stops.
Built for demanding environments, this variant incorporates a SUS304 stainless steel rod for superior corrosion resistance and ships with PT tapered port threads. The extruded aluminum barrel includes dual sensor grooves, and the integrated magnet (-S) supports direct mounting of AirTAC CMSE reed or DMSE electronic solid-state switches. It utilizes variable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-75S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 250 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 SAIJ80BX250-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×250 | 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 SAIJ80BX250-75S Is Used
Product Changeover
Quickly adapt end-of-stroke positions on a packaging line when switching between different carton sizes, utilizing the 75mm adjustment range to avoid mechanical rebuilds.
Machine Setup
Fine-tune the retract position during initial commissioning to perfectly time a 4523N pressing operation without fabricating custom spacer blocks.
Variable End Stops
Provide adjustable material feeding lengths on an assembly conveyor, dialing the stroke back from 250mm to 175mm to accommodate different part geometries.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-75S the Right Cylinder?
If your setup requires less force, stepping down to a 63mm bore yields 2182N at 0.7 MPa; stepping up to a 100mm bore provides 5497N. Choose the SAIJ adjustable version over a fixed SAI cylinder when machine formats change frequently and you need a 175-250mm travel window to accommodate varying product sizes.
Because the 250mm stroke exceeds the 300mm threshold requiring external guidance, it sits just below it, yet the 25mm rod and M20x1.5 thread still necessitate careful alignment to prevent premature side-load wear. To replace an ISO 15552 cylinder, match the 80mm bore, 250mm stroke, 75mm adjustment, PT ports, SUS304 rod, and -S magnet. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true pneumatic locking, consider the SAIL or BSAI series. 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 SAIJ80BX250-75S FAQ
At 0.9 MPa, the push force increases to 4523N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from its 250mm nominal length down to a minimum of 175mm. It sets the travel end but does not lock the load without continuous air pressure.
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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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