Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 80mm 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
- Stroke80 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-20
The AirTAC SAIJ80X80-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing the 80 mm nominal stroke to be fine-tuned down by up to 20 mm for a usable travel window of 60-80 mm. It delivers a push force of 2513 N and a pull force of 2268 N at 0.5 MPa operating pressure. The extruded aluminum barrel features sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches.
This specific configuration features a SUS304 stainless steel rod for enhanced corrosion resistance and is fitted with PT tapered port threads (G3/8). The rear adjustment screw acts purely as a mechanical stop to set the end position during commissioning; it does not lock or hold the load without continuous live air pressure. The mounting interface is dimensionally interchangeable per ISO 15552 and supports a reduced set of accessories: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 80 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 SAIJ80BX80-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×80 | 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 SAIJ80BX80-20 Is Used
Machine Setup Tuning
Dial in the exact 60-80 mm end position during commissioning to perfect a pressing or clamping operation without machining external stop blocks.
Product Size Changeover
Quickly shorten the stroke by up to 20 mm on a packaging line when switching to a slightly smaller product format, minimizing downtime.
Stroke Limiting Press
Use the rear stopper to mechanically restrict the travel window on a light assembly press, ensuring repeatable end-position accuracy.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-20 the Right Cylinder?
Choose this 80 mm bore when your application requires higher thrust than the 50 mm class (982 N push at 0.5 MPa) but does not warrant the larger 100 mm bore (3927 N push). The 20 mm adjustment range is ideal for product changeovers or fine-tuning the end position without swapping cylinders or adding external stops. If your process demands true load holding without live air, consider the SAIL or BSAI series instead, as the SAIJ adjuster only provides a travel stop.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 80 mm stroke, 20 mm adjustment, G3/8 PT ports, and the SUS304 rod material. For this 80 mm stroke, the 25 mm rod diameter and M20x1.5 thread provide robust resistance to side loads, though an external guide is always recommended for heavy radial loads. The variable air cushions at both ends ensure smooth deceleration across the 30-800 mm/s speed range.
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 SAIJ80BX80-20 FAQ
At 0.5 MPa operating pressure, the SAIJ80X80-20 delivers a push force of 2513 N and a pull force of 2268 N. At the maximum 1.0 MPa pressure, it provides a push force of 513 kgf.
The rear adjuster screw acts as a mechanical stop that allows you to trim the 80 mm nominal stroke back by up to 20 mm, creating a usable travel window of 60-80 mm. It only sets the end position and does not hold the load without live air pressure.
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