Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-40 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 SAIJ80BX55-40
The AirTAC SAIJ80X55-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 15 to 55 mm, allowing you to dial back the nominal 55 mm stroke by up to 40 mm during commissioning. Delivering 2513 N of push force at 0.5 MPa, it suits medium-duty positioning tasks.
This variant uses a SUS304 stainless steel rod for superior corrosion resistance and features PT tapered port threads (G3/8). The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is added later. The rear adjuster acts strictly as a travel stop, not a lock, so live air pressure is required to hold the load.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-40 |
|---|---|
| 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 SAIJ80BX55-40
| 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 SAIJ80BX55-40 Is Used
Machine Changeover
Dial in the exact 15 to 55 mm end-stop during product size changes without swapping the cylinder or adding external mechanical stops.
Actuator Setup
Fine-tune the retract position at commissioning to perfect the timing of a pick-and-place assembly using the 40 mm adjustment range.
Variable End Positioning
Adjust the travel limit on the fly for automated clamping stations that need slight positional shifts for different part tolerances.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-40 the Right Cylinder?
Choose this 80 mm bore when you need 2513 N push force at 0.5 MPa (or 3518 N at 0.7 MPa) with precise end-position tuning. If your application requires less force, stepping down to a 63 mm bore yields 1559 N at 0.5 MPa. The adjustable stroke is ideal for machine changeovers where the exact end position varies by product, eliminating the need to physically swap ISO 15552 cylinders or bolt on external stops.
Because the SAIJ80X55-40 has a stroke of 55 mm, side-load risks are minimal, but always ensure the M20x1.5 rod thread is aligned with your load. The mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets, omitting FB, CA, CB, and CR. Remember that the rear adjuster and air cushions only decelerate the load; for true position holding without live air, consider the SAIL or BSAI series instead.
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 SAIJ80BX55-40 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At 0.7 MPa, the push force increases to 3518 N.
The rear adjuster screw allows you to shorten the nominal 55 mm stroke by up to 40 mm, creating a usable travel window of 15 to 55 mm. It functions as a mechanical stop to set the end position, but it does not lock or hold the load without continuous air pressure.
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