Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 275mm 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
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-50S
The AirTAC SAIJ80X275-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down from 275 mm to a minimum of 225 mm. This built-in adjuster acts purely as a mechanical stop for end-position tuning at commissioning; it does not lock or hold the load without live air pressure. For load-holding requirements without continuous air, an external pilot-operated check valve or a related SAIL pneumatic lock cylinder is required.
Delivering 2513 N of push force at 0.5 MPa (up to 4523 N at 0.9 MPa), this bore size provides substantial thrust for heavy handling. It incorporates a SUS420J2 stainless steel rod for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated -S magnet enables position detection using AirTAC CMSE reed switches or DMSE electronic solid-state sensors.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 275 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 SAIJ80AX275-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×275 | 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 SAIJ80AX275-50S Is Used
Machine Setup & Changeover
Dial in the 225-275 mm travel window during product size changeovers without physically swapping the cylinder or bolting on external stops.
Variable End-Stop Positioning
Provides a mechanical rear stop to fine-tune the retract position of heavy conveyor diverters handling varying package sizes.
Heavy Payload Handling
Leverages the 2513 N push force at 0.5 MPa to move heavy jigs or materials, using the 50 mm adjustment to trim the final end position.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-50S the Right Cylinder?
Selecting this 80 mm bore over a smaller 63 mm variant steps the thrust up from 1559 N to 2513 N at 0.5 MPa, providing the higher force needed for heavier payloads. The 50 mm adjustment range is ideal for product changeovers on a line, allowing operators to dial in the exact end-stop without swapping the cylinder or adding external stops. Unlike a fixed-stroke SAI cylinder, this SAIJ model provides a 225-275 mm usable travel window for setup flexibility.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 275 mm nominal stroke, 50 mm adjustment range, PT port threads, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR. Because the stroke is 275 mm, the 25 mm rod diameter should be supported by an external guide to prevent 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 SAIJ80AX275-50S FAQ
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from 275 mm down to 225 mm. It only sets the travel end and does not lock the load without live air pressure.
At 0.5 MPa it provides 2513 N of push force and 2268 N of pull force. At 0.9 MPa, the push force increases to 4523 N.
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Covers non-human-caused product damage.
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