Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-50 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 SAIJ80AX275-50
The AirTAC SAIJ80X275-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the nominal 275 mm travel. This specific SKU provides a usable adjustment window of 225 to 275 mm, enabling precise end-position tuning at commissioning without swapping the barrel or adding external stops. It delivers a robust 4523 N of push force at 0.9 MPa, making it suitable for medium to heavy actuation tasks.
This unit is configured with a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed and DMSE solid-state switches if a magnet is added later. The rear adjuster acts purely as a travel stop to set deceleration, so it cannot hold a load without live air pressure; for true load-holding, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-50 |
|---|---|
| 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 SAIJ80AX275-50
| 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 SAIJ80AX275-50 Is Used
Variable End-Stop Setup
Dial in the exact 225 to 275 mm travel distance required for varying product sizes without changing out the entire cylinder assembly.
Machine Changeover
Quickly fine-tune the retraction end-position during production line format changes, reducing downtime and avoiding external stop hardware.
Medium-Heavy Actuation
Leverage the 4523 N push force at 0.9 MPa to move heavier fixtures or pallets while retaining the flexibility of a 50 mm stroke trim.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-50 the Right Cylinder?
Choose this 80 mm bore when your application requires more thrust than a 63 mm cylinder (which provides 2805 N push at 0.9 MPa) but does not need the full 7068 N push of a 100 mm unit. The 50 mm adjustment range is ideal for product changeovers on a line, letting operators fine-tune the end-of-stroke position quickly. Because the nominal stroke is 275 mm, you should guide the load externally to prevent excessive side loads on the 25 mm rod and M20x1.5 rod thread.
As an ISO 15552 profile cylinder, it is dimensionally interchangeable with standard ISO 15552 mounting interfaces. It supports a reduced set of mounts (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR options. To replace a standard cylinder, match the 80 mm bore, 275 mm stroke, 50 mm adjustment, G3/8 PT port, and desired mounting hardware. Remember that the rear adjuster is a stop, not a lock, so it will not hold a load without continuous air pressure.
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 SAIJ80AX275-50 FAQ
The rear adjuster acts as an external stopper that lets you shorten the effective travel by up to 50 mm, creating a usable stroke window of 225 to 275 mm. It sets the travel end and deceleration but does not lock or hold the load without live air pressure.
At an operating pressure of 0.9 MPa, the SAIJ80X275-50 generates 4523 N of push force and 4071 N of pull force. It operates at speeds between 30 and 800 mm/s.
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