Airtac SAIJ80 Adjustable Cylinder SAIJ80BX145-40
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX145-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 145mm 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
- Stroke145 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 SAIJ80BX145-40
The AirTAC SAIJ80X145-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the retract end-position. Outfitted with a SUS304 stainless steel rod and PT tapered ports, it provides a usable travel window of 105-145 mm, letting you trim up to 40 mm off the nominal stroke during machine setup.
Because the adjustment mechanism acts purely as a mechanical stop and does not lock the load, live air pressure must be maintained to hold position. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to mount position switches if needed later. This adjustable design eliminates the need to physically swap cylinders or bolt on external stops when accommodating slight variations in product dimensions.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX145-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX145-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 145 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 SAIJ80BX145-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×145 | 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 SAIJ80BX145-40 Is Used
Product Changeovers
Dial in the 105-145 mm travel window on the fly to accommodate slight length variations between product runs without changing the cylinder.
End-Position Tuning
Fine-tune the retract stop during machine commissioning to perfect the seating of components, avoiding the need to add external mechanical stops.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX145-40 the Right Cylinder?
The SAIJ80X145-40 is ideal for setups requiring precise end-position tuning during commissioning or frequent product changeovers, offering a distinct advantage over fixed-stroke SAI cylinders. For load-holding applications without continuous air pressure, consider the SAIL or BSAI series instead, as the rear adjuster here only sets the travel end.
When replacing an ISO 15552 cylinder, verify the 80 mm bore, 145 mm stroke, 40 mm adjustment range, PT G3/8 port thread, and required mounting interface. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets. Although the 145 mm stroke is relatively short, the 25 mm rod diameter and M20x1.5 rod thread provide robust resistance to side loads, though external guides are recommended for any offset loading.
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 SAIJ80BX145-40 FAQ
At 0.9 MPa, the push force increases to 4523 N.
The rear adjuster acts as a mechanical stop that allows you to shorten the effective stroke from its nominal 145 mm down to as little as 105 mm, providing a 40 mm tuning window. It only sets the travel end and does not lock or hold the load without live air pressure.
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