Airtac SAIJ80 Adjustable Cylinder SAIJ80BX45-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX45-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 45mm 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
- Stroke45 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX45-40
The AirTAC SAIJ80X45-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end-of-travel position. Outfitted with a SUS304 stainless steel rod and PT tapered ports, it provides a usable travel window of 5 to 45 mm, letting you dial back the nominal 45 mm stroke by up to 40 mm without adding external stops. In this bore size, the extruded aluminum barrel delivers 2513 N of push thrust and 2268 N of pull thrust at 0.5 MPa, making it well-suited for moderate-to-heavy actuation tasks.
Because the adjustment mechanism acts strictly as a mechanical stop on the retract end, it decelerates the piston in conjunction with the standard 36 mm air cushions but does not hold the load without live air pressure. The robust 25 mm rod and M20x1.5 rod thread handle high side loads effectively, and the barrel features sensor grooves on both sides for straightforward position feedback integration.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX45-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX45-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 45 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 SAIJ80BX45-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×45 | 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 SAIJ80BX45-40 Is Used
Machine Changeovers
Quickly reconfigure the retract end-stop from 5 to 45 mm when switching production lines to accommodate varying product lengths without swapping cylinders.
End-Position Tuning
Dial in the exact end-of-stroke position during initial commissioning to perfect pressing or clamping forces without machining external spacers.
Variable Assembly Stops
Adjust the travel window on the fly for assembly stations that handle multiple part sizes, ensuring precise mechanical positioning every time.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX45-40 the Right Cylinder?
Choose this 80 mm bore when an application requires roughly 2513 N of push force at 0.5 MPa and highly variable end-stops; if you need less force, stepping down to a 63 mm bore yields 1559 N, while a 100 mm bore provides 3927 N. The adjustable stroke is selected over a fixed-stroke SAI cylinder when you need to fine-tune travel distances during machine commissioning or product changeovers. Remember that the rear adjuster functions only as a travel stop, not a lock; for load-holding without continuous air pressure, consider an AirTAC SAIL or BSAI series cylinder instead.
As a dimensionally interchangeable ISO 15552 cylinder, this model uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. It operates effectively at speeds between 30 and 800 mm/s.
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 SAIJ80BX45-40 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 can deliver up to 513 kgf.
The rear adjuster screw allows you to shorten the effective stroke by up to 40 mm. With the 45 mm nominal stroke, this creates a usable travel window of 5 to 45 mm, enabling fine-tuning of the end position without external stops.
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