Airtac SAIJ80 Adjustable Cylinder SAIJ80BX185-40S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX185-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 185mm 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
- Stroke185 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 SAIJ80BX185-40S
The AirTAC SAIJ80X185-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 185 mm travel by up to 40 mm. This creates a usable end-position window of 145 to 185 mm, letting you fine-tune the retract distance at commissioning without swapping out the barrel or adding external mechanical stops. The barrel is extruded aluminum with sensor grooves on both sides, and this variant includes a magnet for position sensing.
This SKU ships with a SUS304 stainless steel piston rod for superior corrosion resistance, a PT tapered port thread, and operates at speeds of 30 to 800 mm/s. It features variable air cushions at both ends to absorb impact. The rear adjuster acts solely as a travel stop and does not hold the load without live air pressure; for true load-holding, consider the SAIL or BSAI series. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX185-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX185-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 185 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 SAIJ80BX185-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×185 | 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 SAIJ80BX185-40S Is Used
Machine Changeover
Dial in the 145-185 mm retract stop to accommodate different product lengths on a packaging line without changing hardware.
End-Position Tuning
Fine-tune the final retract distance during commissioning to align tooling perfectly, avoiding the need for external shims.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX185-40S the Right Cylinder?
Choose this 80 mm bore when a 50 mm bore (982 N at 0.5 MPa) lacks the necessary thrust, but a 100 mm bore (3927 N) would be excessive overkill. The adjustable 145-185 mm travel window is selected over a fixed-stroke SAI cylinder when a machine requires variable end-stops for product changeovers or precise setup calibration. Because the rear adjuster is a stop and not a lock, it cannot hold a load without continuous air pressure. For position holding, use a SAIL pneumatic lock, a BSAI clamp-lock, or an external pilot-operated check valve. To replace an ISO 15552 cylinder, match the 80 mm bore, 185 mm stroke, PT G3/8 port, the chosen mounting accessory, and the -S magnet requirement.
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 SAIJ80BX185-40S FAQ
At 0.9 MPa, the push force increases to 4523 N.
A rear adjuster screw lets you shorten the 185 mm nominal stroke by up to 40 mm, creating a usable travel window of 145 to 185 mm. This allows precise end-position tuning without replacing the cylinder.
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