Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-50S 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 SAIJ80X270-50S
The AirTAC SAIJ80X270-50-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 4523N of push force at 0.9 MPa and provides a usable travel window of 220 to 270 mm, letting you dial back the nominal stroke by up to 50 mm during commissioning. The integrated -S magnet works seamlessly with AirTAC CMSE reed and DMSE electronic sensors fitted into the dual-side barrel grooves.
This 80 mm bore actuator uses a G3/8 port and a robust 25 mm carbon steel rod with an M20x1.5 thread, handling higher side loads than smaller bores. The rear adjuster acts purely as a travel stop for end-position tuning and deceleration alongside the standard air cushions; it is not a lock, so the cylinder will not hold a load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-50S |
|---|---|
| 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 SAIJ80X270-50S
| 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 SAIJ80X270-50S Is Used
Machine Changeover
Dial in the exact 220-270 mm end position during product line changeovers without swapping out the physical actuator.
Variable End Stops
Fine-tune the retract distance on the fly to accommodate varying package sizes or diverter positions on the fly.
Assembly Calibration
Precisely set the stroke end-point during initial commissioning to perfect pressing or clamping force against the workpiece.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-50S the Right Cylinder?
Choose this adjustable model when a machine setup requires variable end-stops or product-size changeovers without physically swapping the cylinder or adding external stopper blocks. If your application needs less force, stepping down to a 63 mm bore yields 2805N at 0.9 MPa, while moving up to a 100 mm bore provides 7068N. For load-holding without continuous air pressure, select the SAIL pneumatic-lock or BSAI clamp-lock variant instead of this standard cylinder.
To replace an ISO 15552 cylinder, match the 80 mm bore, 270 mm stroke, 50 mm adjustment range, G3/8 PT ports, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the 270 mm stroke is relatively long, ensure an external guide is used to prevent excessive rod side-loading and premature seal wear.
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 SAIJ80X270-50S FAQ
The rear adjuster screw lets you mechanically shorten the effective stroke from 270 mm down to 220 mm. This allows fine-tuning of the end position during commissioning without adding external stops, though it acts only as a travel stop and does not lock the load.
At 0.9 MPa operating pressure, this 80 mm bore double-acting cylinder provides 4523N of push force and 2268N of pull force, operating at speeds between 30 and 800 mm/s.
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