Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 70mm 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
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-50
The AirTAC SAIJ80X70-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel. With a 70 mm nominal stroke and a 50 mm adjustment range, it provides a highly flexible 20-70 mm usable travel window for precise end-position tuning at commissioning. It delivers a robust 2513 N push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks.
This variant is equipped with a SUS304 stainless steel rod for superior corrosion resistance and features a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. The rear adjuster acts purely as a mechanical stop to set the travel end and does not hold the load without live air pressure; for dead-air load holding, consider an external rod lock or the SAIL series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 70 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 SAIJ80BX70-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×70 | 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 SAIJ80BX70-50 Is Used
Product Changeover
Quickly dial the stroke back from 70 mm to 20 mm via the rear adjuster to accommodate different package sizes on a packaging line without changing hardware.
Machine Setup
Fine-tune the end-of-stroke position during commissioning to achieve exact clamping or pressing depth, preventing damage to parts.
Variable End Stops
Establish precise mechanical stops for repetitive heavy-duty positioning tasks where a fixed stroke cylinder would require shimming.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-50 the Right Cylinder?
Choose this 80 mm bore cylinder when an application requires substantial force—delivering 2513 N push at 0.5 MPa—but demands variable end-stops for frequent product changeovers. If your setup needs less force, stepping down to a 63 mm bore yields 1559 N, whereas larger loads up to 3927 N would require the 100 mm bore. The adjustable rear screw allows you to dial in the exact 20-70 mm stroke on the fly without swapping cylinders or adding external stops, unlike a fixed-stroke SAI model.
When integrating this cylinder, note that the mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR styles. Because the 80 mm bore operates at speeds of 30-800 mm/s and relies on a 25 mm rod with an M20x1.5 thread, it handles side loads well but still requires an external guide for rigid payloads. Ensure your ISO 15552 replacement matches the 80 mm bore, 70 mm stroke, PT port, and SUS304 rod specifications.
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 SAIJ80BX70-50 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 the maximum 1.0 MPa pressure, it can deliver up to 513 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 70 mm nominal stroke by up to 50 mm. This creates a usable travel window of 20-70 mm, which can be fine-tuned during commissioning without replacing the cylinder.
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