Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-50 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 a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke270 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-50
The AirTAC SAIJ80X270-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 220 to 270 mm, allowing you to dial back the nominal 270 mm stroke by up to 50 mm during machine commissioning. This bore size delivers 2513 N of push force and 2268 N of pull force at 0.5 MPa, making it well-suited for medium-to-heavy manipulation tasks.
The carbon steel rod uses an M20x1.5 thread, and the barrel features sensor grooves on both sides for straightforward position feedback. It supports a speed range of 30-800 mm/s and uses a G3/8 port. The rear adjuster acts purely as a travel stop to set end positions, meaning it will not hold a load safely without live air pressure; for true load-holding, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-50 |
|---|---|
| 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 | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-50
| 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 SAIJ80X270-50 Is Used
Machine Commissioning
Fine-tune the 220-270 mm travel window during setup to achieve perfect end-positioning without machining external spacers.
Product Changeover
Rapidly adjust the retract stop to accommodate different package sizes on a packaging line.
Press Fit Tuning
Dial in the exact insertion depth of a 25 mm component by adjusting the rear stopper rather than reprogramming pressure.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-50 the Right Cylinder?
Choose this adjustable model over a fixed-stroke SAI cylinder when your application requires variable end-stops or fine-tuning at changeover without physically swapping the cylinder or adding external stops. If you need less force, stepping down to a 63 mm bore yields 1559 N of push force at 0.5 MPa; stepping up to a 100 mm bore provides 3927 N. To replace this ISO 15552 cylinder, match the 80 mm bore, 270 mm stroke, 50 mm adjustment, PT tapered G3/8 port, and the mounting interface (Basic, FA, LB, TC, FTC, TCM1, or TCM2).
Because the 270 mm stroke is relatively long, the M20x1.5 rod will experience greater leverage under side loads. Always guide the load externally to prevent premature seal wear. Note that this unit lacks a magnet, so it is not compatible with CMSE or DMSE sensors without specifying the -S option.
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 SAIJ80X270-50 FAQ
The rear adjuster allows you to shorten the effective travel from 270 mm down to 220 mm. It functions as a mechanical stop to set the end position, but it does not lock or hold the load without live air pressure.
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. It can reach a maximum push force of 4523 N at 0.9 MPa.
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