Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-20 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 SAIJ80BX70-20
The AirTAC SAIJ80X70-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 50-70 mm usable travel window. Delivering 2513 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod and a PT tapered port. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
This adjustable-stroke design allows you to fine-tune the retract end position during commissioning without adding external stops. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-20 |
|---|---|
| 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 SAIJ80BX70-20
| 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 SAIJ80BX70-20 Is Used
Machine Changeover
Dial in the exact 50-70 mm retract position when switching product sizes on a packaging line without swapping hardware.
End-Stop Tuning
Fine-tune the final end position during initial commissioning to perfect a pressing or clamping motion.
Variable Positioning
Adjust the travel end on the fly for automated assembly lines handling parts with slight dimensional variances.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-20 the Right Cylinder?
Choose this 80 mm bore cylinder when an application requires 2513 N of push force at 0.5 MPa, or 3518 N at 0.7 MPa, combined with precise end-position tuning. If your force requirements are lower, stepping down to a 63 mm bore yields 1559 N at 0.5 MPa. The adjustable 50-70 mm window is ideal for product changeovers, whereas a fixed-stroke SAI cylinder suits static end stops.
As a dimensionally interchangeable ISO 15552 cylinder, replacements match the 80 mm bore, 70 mm stroke, PT port, and Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounts. The 25 mm rod and M20x1.5 thread handle high side loads, but always guide unsupported loads externally.
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 SAIJ80BX70-20 FAQ
The rear adjuster allows you to shorten the nominal 70 mm stroke by up to 20 mm, creating a 50-70 mm usable travel window. It acts as a mechanical stop to fine-tune the end position and is not a lock.
At 0.5 MPa it provides 2513 N of push force and 2268 N of pull force. At 0.7 MPa the push force increases to 3518 N.
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