Airtac SAIJ80 Adjustable Cylinder SAIJ80BX185-50S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX185-50S 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 SAIJ80BX185-50S
The AirTAC SAIJ80X185-50-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. The integrated -S magnet enables direct mounting of CMSE reed or DMSE electronic solid-state sensors along the dual-side extruded barrel grooves.
Equipped with a 50mm adjustment range, this model transforms the 185mm nominal stroke into a highly flexible 135-185mm usable travel window. This allows operators to dial in exact retract end-positions during commissioning or product changeovers without adding external stops. The piston rod is constructed from SUS304 stainless steel (code B) for superior corrosion resistance, and the PT tapered port threads ensure a secure, leak-free pneumatic connection.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX185-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX185-50S |
|---|---|
| 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 SAIJ80BX185-50S
| 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 SAIJ80BX185-50S Is Used
Machine Changeover
Rapidly reconfigure retract distances on packaging lines when switching between different product sizes, using the 50mm adjustment screw to shift the 185mm stroke back to 135mm without changing hardware.
Variable Stop Forming
Accommodate multiple material depths in light assembly presses by adjusting the stroke window on the fly, utilizing the SUS304 stainless rod for durability in demanding industrial environments.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX185-50S the Right Cylinder?
The adjustable stroke is ideal for fine-tuning machinery without swapping the entire cylinder, whereas a fixed-stroke SAI is preferred when the travel distance is permanently locked. For exact ISO 15552 dimensional interchangeability, match the 80mm bore, 185mm stroke, 50mm adjustment, PT G3/8 port, and the -S magnet requirement.
Because the nominal stroke is 185mm, standard mounting supports the load adequately, but always ensure the M20x1.5 rod thread and 25mm rod diameter are aligned to minimize side-loading. The rear adjuster functions strictly as a mechanical travel stop combined with variable air cushions at both ends; it is not a locking device. If the machine requires the load to be held securely without live air pressure, integrate an external pilot-operated check valve or select an AirTAC SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ80BX185-50S FAQ
If operating at 0.7MPa, the push force increases to 3518N.
The rear adjuster acts as a mechanical stop that shortens the effective travel. For this 185mm nominal stroke cylinder, the adjustment screw provides a usable travel window of 135-185mm, allowing you to set the exact retract position without replacing the cylinder.
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