Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-30
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 850mm 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
- Stroke850 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-30
The AirTAC SAIJ80X850-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 850 mm stroke that can be dialed back by up to 30 mm, giving operators an 820-850 mm usable travel window for precise end-position tuning during commissioning. Belonging to the 80 mm bore class, it delivers 2513 N of push force and 2268 N of pull force at 0.5 MPa.
This variant is configured with a SUS304 stainless steel rod (code B) for superior corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU lacks the internal magnet required for CMSE or DMSE switches. The rear adjuster functions strictly as a mechanical stop to set the travel end and does not hold the load without live air.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-30 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 850 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 SAIJ80BX850-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×850 | 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 SAIJ80BX850-30 Is Used
Variable End Stops
Dial in the exact 820 to 850 mm end position during machine commissioning without physically swapping cylinders or adding external mechanical stops.
Product Changeover
Quickly adjust the rear stopper by up to 30 mm to accommodate different product lengths on an automated packaging or sorting line.
Long-Stroke Forming
Leverage the 2513 N push force at 0.5 MPa over an 850 mm travel window, using the fine-tune adjuster to set precise material press depths.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-30 the Right Cylinder?
Choose this 80 mm bore when an application requires more thrust than a 63 mm cylinder (which provides 1559 N push at 0.5 MPa) but does not need the full 3927 N push of a 100 mm unit. The adjustable 820-850 mm window is ideal for machine setups requiring variable end stops or product changeovers, eliminating the need to swap out a fixed-stroke SAI cylinder or bolt on external stops. Because the stroke is 850 mm, an external guide is strongly recommended to prevent excessive side loading on the rod.
For a direct ISO 15552 replacement match, verify an 80 mm bore, 850 mm nominal stroke, 30 mm adjustment range, PT port threads, and the SUS304 rod material. Note that this model omits the magnet, so position sensing is not possible without adding one. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR. If true load-holding without live air pressure is required, consider an AirTAC SAIL or BSAI cylinder instead.
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 SAIJ80BX850-30 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At 0.7 MPa, the push force increases to 3518 N.
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from the nominal 850 mm down to 820 mm. It only sets the end position and does not lock or hold the load without continuous air pressure.
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