Airtac SAIJ80 Adjustable Cylinder SAIJ80AX950-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX950-40S 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 SAIJ80AX950-40S
The AirTAC SAIJ80X950-40-S is a double-acting ISO 15552 profile cylinder featuring a rear mechanical stopper that allows you to dial back the effective stroke by up to 40 mm. This yields a usable travel window of 910 to 950 mm, enabling precise end-position tuning during commissioning without adding external stops. It delivers a robust 2513 N push force at 0.5 MPa and utilizes a SUS420J2 stainless steel rod for superior corrosion resistance.
Equipped with a magnet (-S), this unit supports AirTAC CMSE reed and DMSE solid-state sensors housed within the dual-side extruded barrel grooves. The 950 mm stroke approaches the 1500 mm maximum standard limit for this bore, but the long unsupported travel demands an external guide to prevent excessive rod side-loading. Fluid supply arrives via PT tapered G3/8 ports, and the adjustable stopper acts purely as a travel limit, not a lock.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX950-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX950-40S |
|---|---|
| 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 SAIJ80AX950-40S
| 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 SAIJ80AX950-40S Is Used
Variable End-Stop Forming
Dial in the 910-950 mm travel window during metal forming press changeovers to accommodate different material lengths without physically swapping the actuator.
Product-Size Changeover
Adjust the rear stopper by up to 40 mm to instantly tune the pusher end-position for varying package dimensions moving down a packaging line.
Commissioning Stroke Tuning
Fine-tune the exact retract end-position during machine commissioning to clear mechanical interference, avoiding the need to remachine hard stops.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX950-40S the Right Cylinder?
Select this 80 mm bore when an application requires high thrust (up to 4523 N at 0.9 MPa) combined with variable end-stop positioning. If your process needs less force, stepping down to a 63 mm bore yields 1559 N at 0.5 MPa, whereas moving up to a 100 mm bore provides 3927 N at 0.5 MPa. Choose the SAIJ adjustable-stroke format over a fixed SAI cylinder when you need on-the-fly stroke trimming for product changeovers or fine-tuning machine setup.
For drop-in ISO 15552 interchangeability, match the 80 mm bore, 950 mm nominal stroke, 40 mm adjustment range, PT G3/8 port thread, and -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR. Because the rear adjuster is a stop and not a lock, this cylinder will not hold a load without live air; for true position holding, consider the SAIL or BSAI series instead.
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 SAIJ80AX950-40S 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 delivers up to 513 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 950 mm nominal stroke by up to 40 mm, creating a 910 to 950 mm usable travel window. It only sets the travel end and does not lock or hold the load without live air pressure.
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