Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-20S 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 SAIJ80BX950-20S
The AirTAC SAIJ80X950-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 930 to 950 mm. Delivering 4523 N of push force at 0.9 MPa, it handles substantial loads while allowing precise end-position tuning during commissioning without swapping out the cylinder. The integrated -S magnet supports position sensing via AirTAC CMSE reed or DMSE electronic solid-state switches.
Built with a SUS304 stainless steel rod (code B) and PT tapered ports, this extruded aluminum profile cylinder is tailored for demanding environments. The 950 mm stroke approaches the maximum standard limit for this bore, making the robust 25 mm rod and M20x1.5 rod thread critical for managing side loads. The rear adjustment screw acts purely as a travel stop for deceleration and does not lock the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-20S |
|---|---|
| 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 SAIJ80BX950-20S
| 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 SAIJ80BX950-20S Is Used
Long-Stroke Forming
Dial in the exact 930-950 mm end position for large-panel pressing or forming tasks during initial setup, ensuring perfect contact without remounting the actuator.
Product Changeover Stops
Adjust the rear stopper by up to 20 mm on the fly to accommodate varying package lengths on a conveyor line, enabling rapid format size transitions.
Sensor Mapping Calibration
Leverage the -S magnet with CMSE or DMSE sensors alongside the adjustable stop to perfectly synchronize the 950 mm travel end with automated machine timing.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-20S the Right Cylinder?
Select this 80 mm bore cylinder when an application requires 4523 N of thrust at 0.9 MPa and variable end-stop positioning; if you need less force, stepping down to a 63 mm bore yields 2805 N, while a 100 mm bore provides 7068 N. The adjustable-stroke design is ideal for machine setups requiring fine-tuning at commissioning or frequent product-size changeovers, bypassing the need to bolt on external stops. For any stroke length of 950 mm, an external guide is strongly recommended to support the rod and prevent excessive side-loading.
To match this exact configuration as an ISO 15552 replacement, specify the 80 mm bore, 950 mm stroke, 20 mm adjustment range, PT port threads, and the -S magnet option. Remember that the rear adjuster and air cushions only set the travel end and decelerate the load; they do not function as a lock. For load-holding without live air pressure, consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external rod lock. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, intentionally omitting FB, CA, CB, and CR.
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 SAIJ80BX950-20S FAQ
At an operating pressure of 0.9 MPa, this 80 mm bore cylinder provides a push force of 4523 N and a pull force of 3681 N. The maximum theoretical force at 1.0 MPa is 513 kgf.
The rear adjuster screw allows you to shorten the 950 mm nominal stroke by up to 20 mm, creating a 930-950 mm usable travel window. This stopper fine-tunes the end position but does not hold the load without continuous air pressure.
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