Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-50S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX250-50S 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 SAIJ80BX250-50S
The AirTAC SAIJ80X250-50-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. This built-in adjustability allows precise end-position tuning at commissioning without swapping hardware or adding external stops.
Equipped with a SUS304 stainless steel rod and PT tapered ports, this unit is designed for demanding environments. The integrated magnet (-S) supports position sensing via AirTAC CMSE reed or DMSE solid-state switches mounted into the dual-side sensor grooves. It utilizes a reduced mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-50S |
|---|---|
| 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 SAIJ80BX250-50S
| 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 SAIJ80BX250-50S Is Used
Product Changeover
Dial in the 200-250mm travel window during format changeovers on packaging lines without replacing the cylinder or adding shims.
End-Stop Tuning
Fine-tune the retract end-position during machine commissioning to achieve precise mechanical alignment using the rear screw.
Variable Forming
Adjust the stroke depth dynamically for pressing or forming applications that require slight variations in travel distance.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-50S the Right Cylinder?
The 50mm adjustment range is ideal for product-size changeovers on a line, allowing operators to dial in the exact 200-250mm travel distance on the fly. For fixed-position tasks without variance, a standard SAI cylinder is simpler, but the SAIJ excels where setup flexibility is paramount.
When specifying an ISO 15552 replacement, match the 80mm bore, 250mm stroke, PT ports, and the -S magnet requirement. Because the nominal stroke is 250mm, ensure adequate external guiding to handle side loads, as the 25mm rod diameter handles deflection well but cannot replace linear rails. Note that the rear adjuster is a travel stop, not a lock; the cylinder will not hold a load without live air, so deploy a SAIL or BSAI cylinder if true load-holding is required.
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 SAIJ80BX250-50S FAQ
At 0.7MPa, the push force increases to 3518N.
The rear adjuster acts as a mechanical stop that shortens the 250mm nominal stroke by up to 50mm, providing a usable travel window of 200-250mm. 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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