Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 950mm 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
- Stroke950 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-40
The AirTAC SAIJ80X950-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 910 to 950 mm usable travel window. It delivers a robust 2513 N pull force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks. The barrel is extruded aluminum and includes sensor grooves on both sides for flexible switch placement.
This specific SKU is configured with a SUS304 stainless steel rod (option B) for superior corrosion resistance and a PT tapered port thread. The rear adjuster acts purely as a mechanical stop to fine-tune the end position without swapping components. It does not hold the load without live air pressure; for dead-load holding, consider the SAIL or BSAI series instead.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 950 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 SAIJ80BX950-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×950 | 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 SAIJ80BX950-40 Is Used
Variable End-Stop Positioning
Dial in the exact retract distance within the 910-950 mm window during machine setup without machining new hard stops.
Product Size Changeover
Quickly adjust the cylinder's extended reach on a packaging line to accommodate varying package lengths on the fly.
Heavy-Duty Assembly Press
Leverage the 2513 N pull force to seat large components, using the rear screw to fine-tune the pressing depth.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-40 the Right Cylinder?
Select this 80 mm bore cylinder when an application requires substantial force (2513 N pull at 0.5 MPa) alongside precise end-position tuning during commissioning or product changeover. The adjustable-stroke design eliminates the need to bolt on external stops or swap the cylinder when trimming travel by up to 40 mm. If your force requirements are lower, stepping down to a 63 mm bore yields 1402 N pull, while a 100 mm bore offers 3681 N pull for heavier loads.
Because this unit features a 950 mm stroke, the 25 mm diameter piston rod is highly susceptible to side-loading and sagging; an external guide rail must be used to prevent premature seal wear. This model uses a PT port and supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). It is dimensionally interchangeable with ISO 15552 cylinders.
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 SAIJ80BX950-40 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of pull force and 3518 N of push force. It can deliver a maximum push force of 4523 N at 1.0 MPa.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective travel from the 950 mm nominal stroke down to 910 mm. This enables fine-tuning at commissioning without replacing the cylinder, though it does not lock the position without live air pressure.
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