Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-20
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX250-20 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 SAIJ80BX250-20
The AirTAC SAIJ80X250-20 is a double-acting, double-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 250 mm stroke that can be fine-tuned down by up to 20 mm, creating a precise 230-250 mm usable travel window.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads with a G3/8 air connection. The extruded aluminum barrel includes sensor grooves on both sides. Because this is a standard 250 mm stroke, it falls well within the 1500 mm maximum standard stroke for this bore size, ensuring readily available dimensions.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-20 |
|---|---|
| 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 SAIJ80BX250-20
| 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 SAIJ80BX250-20 Is Used
Machine Changeover
Quickly reconfigure the 230-250 mm travel window for different product sizes without replacing the cylinder or bolting on external stops.
End-Position Tuning
Fine-tune the retract end position during commissioning to achieve exact placement, absorbing mechanical tolerances in the fixture.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-20 the Right Cylinder?
The adjustable stroke is ideal for product changeovers on a line, letting operators dial in the exact end-stop without swapping the cylinder or adding external stops.
For any stroke at or above 300 mm, an external guide is recommended to manage side loads, though this 250 mm unit relies on its 25 mm rod diameter for stability. Remember that the rear adjuster is a travel stop, not a lock; the cylinder will not hold its load without live air. For load-holding without pressure, consider the SAIL or BSAI series. This model is dimensionally interchangeable per ISO 15552 and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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 SAIJ80BX250-20 FAQ
At the maximum 1.0 MPa pressure, it can deliver up to 513 kgf.
The rear adjuster acts as a mechanical stop that trims the effective travel. For this SAIJ80X250-20, you can shorten the 250 mm nominal stroke by up to 20 mm, resulting in a usable travel window of 230 to 250 mm. It is a stop, not a lock, and requires live air to hold the load.
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 SAIJ80BX250-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.