Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 55mm 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
- Stroke55 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-20S
The AirTAC SAIJ80X55-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2513N of push force at 0.5 MPa, utilizing a G3/8 port and a 25mm piston rod. The integrated -S magnet enables precise position detection with AirTAC CMSE reed or DMSE electronic solid-state switches.
With a 55mm nominal stroke and a 20mm adjustment range, this SKU provides a usable travel window of 35-55mm. This allows you to fine-tune the retract end position at commissioning without adding external stops. The rod is constructed from SUS304 stainless steel (code B) for superior corrosion resistance, and the extruded aluminum barrel features sensor grooves on both sides for flexible switch mounting.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 55 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 SAIJ80BX55-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×55 | 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 SAIJ80BX55-20S Is Used
Machine Changeover
Dial in the 35-55mm travel window during product size changes to set exact retract positions without swapping hardware.
End-Stop Calibration
Fine-tune the final resting position of high-force tooling at commissioning using the rear adjustment screw.
Variable End Positioning
Adapt clamping or pressing depth on the fly for flexible manufacturing lines requiring precise stroke limits.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-20S the Right Cylinder?
Select this 80mm bore cylinder when an application requires high thrust combined with variable end-stop positioning. If you need less force, stepping down to a 63mm bore yields 1559N of push force at 0.5 MPa. The rear adjuster on this model acts solely as a mechanical travel stop to decelerate the load; it does not hold the load without live air. For load-holding requirements without continuous pressure, consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder.
This cylinder is dimensionally interchangeable per ISO 15552. To ensure a seamless replacement, verify the 55mm stroke, 20mm adjustment, PT tapered port threads, and your preferred mounting style. The SAIJ series supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
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 SAIJ80BX55-20S FAQ
The rear adjuster acts as a mechanical stop that lets you trim the effective stroke by up to 20mm. This creates a usable travel window of 35-55mm, allowing you to fine-tune the end position without changing the cylinder.
At 0.5 MPa operating pressure, it provides 2513N of push force and 2268N of pull force. It can reach a maximum push force of 4523N at 0.9 MPa.
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