Airtac SAIJ80 Adjustable Cylinder SAIJ80AX450-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX450-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 450mm 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
- Stroke450 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX450-40S
The AirTAC SAIJ80X450-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2513N push force at 0.5MPa, stepping up to 4523N at 0.9MPa, making it well-suited for heavy-duty positioning tasks. The integrated -S magnet enables seamless position detection using AirTAC CMSE reed or DMSE electronic solid-state sensors housed within the dual-side extruded aluminum barrel grooves.
Featuring a 450mm nominal stroke, the external rear stopper lets you fine-tune the effective travel down by up to 40mm, creating a precise 410-450mm usable window. This cylinder uses a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and accepts PT threaded G3/8 ports. The adjustable screw acts purely as a mechanical end-stop to set the retract position; it does not lock the load, meaning live air pressure is required to maintain position under load.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX450-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX450-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 450 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 SAIJ80AX450-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×450 | 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 SAIJ80AX450-40S Is Used
Machine Changeover
Dial in the 410-450mm retract position precisely during product family changeovers, eliminating the downtime required to physically swap out fixed-stroke actuators.
Variable End-Stop Routing
Adjust the physical stopping point for diverter arms on a packaging line, tuning the stroke by up to 40mm to accommodate different carton depths on the fly.
Heavy-Duty Positioning
Leverage the 2513N push force at 0.5MPa to move heavy pallets or fixtures, using the rear screw to set the exact home position without complex external stopper blocks.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX450-40S the Right Cylinder?
Selecting this 80mm bore makes sense when a 50mm cylinder (offering 982N push at 0.5MPa) lacks the thrust for your tooling, but a 100mm bore (delivering 3927N) would be physical overkill. The adjustable 410-450mm travel window is ideal for machine changeovers, allowing you to dial in the exact retract distance during commissioning without adding external stops or swapping out a fixed-stroke SAI cylinder. To replicate this exact configuration as an ISO 15552 replacement, match the 80mm bore, 450mm stroke, 40mm adjustment, PT G3/8 ports, SUS420J2 rod, -S magnet, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
Because this model features a 450mm stroke, the 25mm rod diameter and M20x1.5 rod thread provide substantial rigidity, but an external guide is still strongly recommended to prevent excessive side-loading on the piston over long unsupported travels. Remember that the rear adjuster and variable air cushions only decelerate the end-of-travel motion; they do not function as a brake. If your application requires true load-holding without continuous air pressure, consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder 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 SAIJ80AX450-40S FAQ
At 0.5MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. If pressure is increased to 0.9MPa, the push force reaches 4523N.
The rear adjusting screw acts as a mechanical stopper that allows you to shorten the 450mm nominal stroke by up to 40mm, providing a usable travel window of 410-450mm. It sets the end position but does not lock the load without live air pressure.
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