Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-50
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX270-50 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 SAIJ80BX270-50
The AirTAC SAIJ80X270-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 270 mm travel by up to 50 mm. This creates a highly flexible 220-270 mm usable travel window for precise end-position tuning during commissioning.
This model features a PT tapered G3/8 port and a robust 25 mm rod with an M20x1.5 thread, providing excellent side-load capacity. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches. Mounting options cover the SAIJ subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-50 |
|---|---|
| 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 SAIJ80BX270-50
| 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 SAIJ80BX270-50 Is Used
Machine Changeover
Quickly adjust the 220-270 mm travel window when switching product sizes on a packaging line, using the rear stopper to set new end positions without changing hardware.
End-Position Tuning
Fine-tune the retract stroke during initial commissioning to achieve exact positioning, compensating for mechanical tolerances without adding external stops.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-50 the Right Cylinder?
If you need less force, step down to the 50 mm bore which provides 982 N. If you require more power, the 100 mm bore offers 3927 N. The adjustable stroke is ideal for product-size changeovers on a production line, as the rear stopper screw lets you fine-tune the retract position without swapping the cylinder or bolting on external stops.
Because the 270 mm stroke exceeds 300 mm is not the case here, but at 270 mm you should still evaluate side loading. The 25 mm SUS304 rod handles more bending stress than smaller rods, yet long unsupported strokes still require an external guide to prevent premature seal wear. Remember that the rear adjuster is a travel stop, not a lock; this cylinder will not hold a load without live air. For true load-holding, consider the SAIL or BSAI series. To match this ISO 15552 footprint exactly, specify an 80 mm bore, 270 mm stroke, 50 mm adjustment, PT G3/8 port, and no magnet.
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 SAIJ80BX270-50 FAQ
At the maximum pressure of 1.0 MPa, it delivers a maximum push force of 513 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke from the nominal 270 mm down to a minimum of 220 mm. This provides a 50 mm tuning window to set the exact retract end-position without replacing the cylinder.
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