Airtac SAIJ80 Adjustable Cylinder SAIJ80BX185-20S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX185-20S 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 SAIJ80BX185-20S
The AirTAC SAIJ80X185-20-S is a double-acting, adjustable-stroke ISO 15552 profile cylinder featuring a robust SUS304 stainless steel rod and a magnetic piston for position sensing. The rear adjuster screw provides a usable travel window of 165-185mm, allowing you to dial in the exact end-of-stroke position without adding external stops.
This rear adjuster functions strictly as a travel stop to set the retract end-position, not as a load-holding lock; it cannot hold a load without live air pressure. For position holding without continuous air, consider the SAIL or BSAI series. The extruded aluminum barrel includes sensor grooves on both sides, seamlessly accommodating CMSE reed and DMSE electronic switches.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX185-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX185-20S |
|---|---|
| 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 SAIJ80BX185-20S
| 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 SAIJ80BX185-20S Is Used
Machine Changeover
Fine-tune the 165-185mm retract stop instantly when switching between product sizes on a packaging line, eliminating the need to physically swap cylinders.
End-Position Calibration
Dial in the exact clamping or pressing depth during initial commissioning using the rear adjuster, ensuring precise force delivery without external shims.
Variable End-Stops
Adjust the effective travel window on the fly for automated assembly equipment that processes parts with slightly varying dimensional tolerances.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX185-20S the Right Cylinder?
The adjustable 165-185mm travel is ideal for machine setups requiring fine end-position tuning during commissioning or product changeovers, offering more flexibility than a fixed-stroke SAI cylinder.
Because the 185mm stroke is below the 300mm threshold, side-load stress is moderate, but the 25mm rod diameter and M20x1.5 thread provide excellent rigidity. If your load geometry introduces severe lateral forces, an external guide is still recommended. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). To replace an ISO 15552 cylinder, match the 80mm bore, 185mm stroke, 20mm adjustment, PT G3/8 port, and -S magnet.
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 SAIJ80BX185-20S FAQ
It operates at speeds between 30-800 mm/s.
The rear adjuster screw allows you to shorten the 185mm nominal stroke by up to 20mm, creating a usable travel window of 165-185mm. It acts as a physical stop to fine-tune the retract position and does not lock the load without live air.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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