Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-30S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-30S 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 SAIJ80X270-30S
The AirTAC SAIJ80X270-30-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. Instead of a fixed 270 mm end position, the external screw allows you to dial back the travel by up to 30 mm, creating a precise 240-270 mm usable window. This is highly effective for fine-tuning end positions at commissioning or adapting to product size changes without physically swapping the actuator.
Delivering 2513 N of push force at 0.5 MPa and 4523 N at 0.9 MPa, this 80 mm bore profile cylinder integrates a -S magnet for AirTAC CMSE reed and DMSE electronic sensors, which mount directly into the dual-side extruded barrel grooves. It features a 25 mm carbon steel rod with an M20x1.5 thread, providing robust resistance to side loading. The mounting interface includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR brackets.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-30S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-30S |
|---|---|
| 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 SAIJ80X270-30S
| 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 SAIJ80X270-30S Is Used
Machine Changeover
Dial in the 240-270 mm travel window during product size changeovers to set new end positions rapidly without disassembling the line.
End-Stop Tuning
Fine-tune the retract position during commissioning to perfect the seating of parts, avoiding the need to swap out the entire cylinder.
Sensor Integration
Utilize the integrated -S magnet with DMSE solid-state sensors in the dual-side barrel grooves for precise position feedback.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-30S the Right Cylinder?
Choose this adjustable model over a fixed-stroke SAI when your application requires variable end-stops or frequent machine changeovers, as the rear adjuster allows you to reposition the travel limit without adding external stops. If you need less force, stepping down to a 63 mm bore yields 1559 N at 0.5 MPa, while moving up to a 100 mm bore provides 3927 N. Because the 270 mm stroke exceeds 250 mm, ensure you use an external guide for long unsupported loads to prevent rod bending. To replace this cylinder with another ISO 15552 unit, match the 80 mm bore, 270 mm stroke, 30 mm adjustment, PT tapered port thread, and -S magnet. Remember that the rear adjuster is a travel stop, not a lock; the SAIJ will not hold a load without live air, so use an SAIL or BSAI cylinder for fail-safe holding.
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 SAIJ80X270-30S FAQ
At 0.5 MPa, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At 0.9 MPa, the push force increases to 4523 N.
The rear adjuster screw acts as a mechanical stop that shortens the nominal 270 mm stroke by up to 30 mm, giving you a 240-270 mm usable travel window. It sets the end position but does not lock the load without live air pressure.
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