Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-75
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX250-75 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 SAIJ80BX250-75
By turning the external stopper screw, you can fine-tune the effective travel anywhere within a 175-250 mm window. This allows precise end-position calibration during commissioning without swapping out the physical cylinder or adding external stops.
It features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads (G3/8). The extruded aluminum barrel includes sensor grooves on both sides, and while this specific SKU omits the magnet, the shared design accommodates AirTAC CMSE reed and DMSE electronic sensors when needed. The rear adjuster functions strictly as a travel stop, not a load-holding lock.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-75 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-75 |
|---|---|
| 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 SAIJ80BX250-75
| 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 SAIJ80BX250-75 Is Used
Product Size Changeovers
Dial the stroke back from 250mm to 175mm instantly via the rear adjuster when switching a conveyor line to handle a smaller package format.
End-Position Calibration
Fine-tune the exact retract distance during machine setup without fabricating custom spacer blocks or changing the cylinder mounting.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-75 the Right Cylinder?
Choose this 80mm bore when an application requires higher thrust than the 50mm bore (982N at 0.5 MPa) but less than the 100mm bore (3927N). The 75mm adjustment range is ideal for production lines running multiple product sizes, allowing the end-stop to be dialed back rapidly during changeovers instead of mechanically repositioning the cylinder. For operations requiring the cylinder to hold a load without live air pressure, the adjuster and air cushions will not act as a brake; consider an AirTAC SAIL or BSAI series cylinder instead.
When replacing an ISO 15552 cylinder, match the 80mm bore, 250mm nominal stroke, PT port threads, and the specific 75mm adjustment code. Because the 250mm stroke is substantial, the 25mm rod diameter and M20x1.5 rod thread provide robust support, but an external guide is still recommended to prevent side-loading damage on long unsupported travels. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
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 SAIJ80BX250-75 FAQ
The standard operating speed range for this bore size is 30-800 mm/s.
The rear adjuster acts as a mechanical stop that can shorten the nominal 250mm stroke by up to 75mm, providing a usable travel window of 175-250mm. It only sets the travel end and does not lock 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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