Airtac SAIJ80 Adjustable Cylinder SAIJ80BX140-40S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX140-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 140mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ80 mm
- Stroke140 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX140-40S
Its 140mm nominal stroke can be dialed back by up to 40mm, creating a precise 100-140mm usable travel window for exact end-position tuning during commissioning. This model features a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for position sensing.
Unlike a fixed-stroke SAI unit, this adjustable variant allows you to trim the retract distance without swapping the cylinder or adding external stops. The rear adjuster acts purely as a travel stop and works alongside the standard 36mm air cushions to decelerate the load, but it does not hold the load without live air. For load-holding requirements, an external rod lock or a SAIL pneumatic lock cylinder is required.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX140-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX140-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 140 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 | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | — |
| Max (@1.0 MPa) | 463 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80BX140-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×140 | 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 SAIJ80BX140-40S Is Used
Product Size Changeovers
Dial in the 100-140mm travel window on the fly when switching between product lengths on a packaging line, avoiding the need to physically swap cylinders or re-machine fixed stops.
Commissioning End-Position Tuning
Use the 40mm rear adjuster to fine-tune the exact retract distance during machine setup, hitting precise mechanical clearances without adding external spacers.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX140-40S the Right Cylinder?
The adjustable 100-140mm travel window is ideal for product-size changeovers on a line, allowing operators to fine-tune the retract end-stop without machining new hard stops. Since the stroke is 140mm, side-loading is minimal, but always ensure the load is guided externally to prevent binding.
To match this exact configuration for an ISO 15552 replacement, specify an 80mm bore, 140mm stroke, 40mm adjustment, PT tapered ports, and the -S magnet option. The -S magnet works seamlessly with AirTAC CMSE reed switches and DMSE electronic sensors fitted into the dual-side sensor grooves on the extruded aluminum barrel. Remember that neither the rear adjuster nor the air cushions function as a lock; if the load must be held without continuous air pressure, consider a BSAI clamp-lock cylinder.
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 SAIJ80BX140-40S FAQ
At the maximum 1.0 MPa pressure, it achieves a maximum push force of 513 kgf.
The rear adjuster acts as a mechanical stop that shortens the 140mm nominal stroke by up to 40mm, providing a usable travel window of 100-140mm. It only sets the travel end and does not lock or hold the load without continuous air pressure.
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