Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-20 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 SAIJ80BX900-20
The AirTAC SAIJ80X900-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 2513N of push force at 0.5 MPa. It features a robust 25mm SUS304 stainless steel rod and PT tapered ports. By integrating an external adjusting screw, this model provides an exact usable travel window of 880 to 900mm, allowing you to dial in the retract end-position without swapping out the entire unit.
This adjustable-stroke design is built for fine end-position tuning during commissioning or product changeovers, eliminating the need to bolt on external stops. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. While the rear screw and variable air cushions manage deceleration, remember they act as travel stops rather than locks; for dead-load holding without live air, consider the SAIL or BSAI series instead.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-20 |
|---|---|
| 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 SAIJ80BX900-20
| 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 SAIJ80BX900-20 Is Used
Variable End-Stop Positioning
Dial in the exact retract distance within the 880-900mm window during machine commissioning to accommodate different material lengths without adding external hard stops.
Product Size Changeover
Quickly adjust the stroke end-position on automated lines processing varying product sizes, using the rear screw to fine-tune the 2513N thrust delivery.
Long-Stroke Alignment
Leverage the 25mm SUS304 stainless steel rod for robust actuation over 900mm of travel, ensuring reliable performance in extended-length assembly equipment.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-20 the Right Cylinder?
Choose this 80mm bore when an application demands substantial thrust—such as the 2513N push force at 0.5 MPa—stepping up from a 63mm bore that yields 1559N, or scaling down from a 100mm bore providing 3927N. The 20mm adjustment window is ideal for machinery requiring precise variable end-stops during setup, offering far more flexibility than a fixed-stroke SAI cylinder. Because the nominal stroke is 900mm, the extended 25mm rod diameter requires careful alignment; an external guide is strongly recommended to prevent excessive side-loading and premature seal wear.
To guarantee a seamless ISO 15552 replacement, verify the 80mm bore, 900mm stroke, 20mm adjustment range, PT port threads, and the specific mounting accessory (choose from Basic, FA, LB, TC, FTC, TCM1, or TCM2). This configuration utilizes a SUS304 rod and omits the -S magnet, so position sensing via CMSE or DMSE switches is not supported unless a magnetized variant is specified.
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 SAIJ80BX900-20 FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. It can reach a maximum push force of 4523N at 0.9 MPa.
The rear adjusting screw acts as a mechanical stopper, allowing you to shorten the effective stroke by up to 20mm. This creates a usable travel window of 880 to 900mm, enabling precise end-position tuning at commissioning without changing the cylinder.
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