Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-20 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 SAIJ80BX55-20
The AirTAC SAIJ80X55-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 55 mm travel by up to 20 mm. This creates a precise 35-55 mm usable stroke window, ideal for fine-tuning end positions during commissioning without swapping out the physical actuator. It delivers a robust 2513 N push force at 0.5 MPa.
This SKU features a SUS304 stainless steel rod for superior corrosion resistance and carries a G3/8 PT tapered port. The extruded aluminum barrel includes sensor grooves on both sides. Mounting options are limited to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-20 |
|---|---|
| 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 SAIJ80BX55-20
| 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 SAIJ80BX55-20 Is Used
Product Changeover
Dial in the 35-55 mm stroke window on the fly to accommodate slight variations in packaging dimensions without changing the cylinder.
End-Stop Calibration
Use the rear screw to fine-tune the exact retraction point during machine setup, ensuring perfect alignment before locking down the system.
Short-Stroke Clamping
Leverage the 2513 N push force at 0.5 MPa to secure heavy workpieces, using the adjuster to prevent over-travel on delicate parts.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-20 the Right Cylinder?
Select this 80 mm bore actuator when an application requires substantial force—stepping down to a 63 mm bore drops the 0.5 MPa push force to 1559 N, whereas this model provides 2513 N. The adjustable 35-55 mm window is chosen over a fixed SAI cylinder when you need variable end-stops for product changeovers. Remember that the rear adjuster functions strictly as a travel stop, not a lock; it cannot hold a load without continuous air pressure. For load-holding requirements, consider an external rod lock or the SAIL series.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 55 mm stroke, 20 mm adjustment, G3/8 PT port, and SUS304 rod material. Because this model lacks a magnet (-S), it will not work with CMSE reed or DMSE electronic sensors without specifying a magnetic piston.
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 SAIJ80BX55-20 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 acts as an external stopper that lets you shorten the effective stroke by up to 20 mm. This means the 55 mm nominal stroke can be precisely trimmed to any travel length between 35 and 55 mm during commissioning.
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