Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 900mm 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
- Stroke900 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-20S
The AirTAC SAIJ80X900-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features an 80mm bore generating 2513N push force at 0.5MPa, paired with a 900mm nominal stroke that can be dialed back by up to 20mm, yielding a precise 880-900mm usable travel window. The rod is constructed from SUS304 stainless steel (B option) for superior corrosion resistance, and the -S magnet enables direct mounting of CMSE reed and DMSE solid-state sensors along the dual-side barrel grooves.
This model uses a PT tapered G3/8 port and includes adjustable air cushions at both ends to manage kinetic energy. The rear adjuster acts purely as a mechanical stop for end-position tuning during commissioning; it is not a locking device and cannot hold a load without live air pressure. For position holding, a SAIL or BSAI variant is required.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 900 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 SAIJ80BX900-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×900 | 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 SAIJ80BX900-20S Is Used
End-Position Tuning
Dial in the exact retract distance within the 880-900mm window during commissioning without swapping out the entire cylinder.
Product Changeover
Quickly adjust the mechanical stop to accommodate slight variations in product dimensions on a packaging line.
Long-Stroke Assembly
Utilize the 900mm travel for large press operations while relying on the SUS304 rod for corrosion resistance.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-20S the Right Cylinder?
Choose this 80mm bore when an application requires 2513N of push force at 0.5MPa, or step down to the 50mm bore (982N) for lighter duties. An adjustable stroke is preferred over a fixed SAI cylinder when you need to fine-tune the retract end position during machine setup or product changeover without adding external stops. When replacing an ISO 15552 cylinder, match the 80mm bore, 900mm stroke, 20mm adjustment, G3/8 PT ports, Basic/LB/TC/FA/FTC/TCM1/TCM2 mounting, and the -S magnet.
Because the 900mm stroke is relatively long, the 25mm rod diameter and M20x1.5 thread provide robust support, but an external guide is still recommended to prevent excessive side-loading on the piston. Operating speed ranges from 30-800mm/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 SAIJ80BX900-20S FAQ
At 0.5MPa, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. The operating speed ranges from 30 to 800mm/s.
The rear adjuster allows you to shorten the effective stroke by up to 20mm, creating a usable travel window of 880-900mm. It functions as a mechanical stop for end-position tuning, not as a load lock.
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