Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-20S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX270-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 270mm 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
- Stroke270 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 SAIJ80BX270-20S
The AirTAC SAIJ80X270-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 270 mm stroke that can be fine-tuned backward by up to 20 mm, creating a precise 250-270 mm usable travel window for commissioning without external stops. This unit includes a SUS304 stainless steel rod (option B) for corrosion resistance and a magnetic piston for position sensing.
The extruded aluminum barrel integrates sensor grooves on both sides, directly supporting AirTAC CMSE reed and DMSE electronic solid-state switches. Pneumatic cushioning at both ends, set at 36 mm for this bore, decelerates the mass, but the rear adjuster acts only as a travel stop. It does not lock the load without live air pressure. Mounting options use the reduced SAIJ set: Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 270 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 SAIJ80BX270-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×270 | 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 SAIJ80BX270-20S Is Used
Product Changeover
Dial in the 250-270 mm end stop during format size changes on a packaging line without adding physical shims.
End-Position Tuning
Fine-tune the retract stroke during machine commissioning to achieve exact clamping depth against varying workpieces.
Variable End Stops
Adjust the rear stopper to alter the pusher distance on a conveyor based on varying package dimensions.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-20S the Right Cylinder?
Choose this 80 mm bore when a 50 mm bore (982 N at 0.5 MPa) is too weak but a 100 mm bore (3927 N at 0.5 MPa) is oversized. The adjustable 250-270 mm window is ideal for product changeovers on a line, allowing you to dial in the exact end position without swapping the cylinder. For load-holding without continuous air pressure, select the SAIL or BSAI series instead, as this adjuster is strictly a stop. When replacing an ISO 15552 cylinder, match the 80 mm bore, 270 mm stroke, 20 mm adjustment, PT tapered port, and -S magnet.
Because the 270 mm stroke creates a long extension, the 25 mm rod and M20x1.5 thread provide substantial side-load capacity, but an external guide rail is still recommended for heavy off-center loads. The cylinder operates at speeds of 30-800 mm/s.
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 SAIJ80BX270-20S FAQ
At the maximum operating pressure of 1.0 MPa, it delivers up to 513 kgf.
The rear adjusting screw acts as a mechanical stopper, allowing you to shorten the 270 mm nominal stroke by up to 20 mm, yielding a usable travel window of 250-270 mm.
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Genuine AirTAC parts produced by AirTAC factory.
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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