Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-75
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-75 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 SAIJ80BX850-75
The AirTAC SAIJ80X850-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 75 mm. This creates a highly usable 775-850 mm stroke window, letting you dial in the exact end position at commissioning without swapping out the unit. It delivers a robust 2268 N pull force at 0.5 MPa, making it well-suited for moving heavy loads through long linear paths.
This specific SKU is built with a SUS304 stainless steel rod (option B) for superior corrosion resistance in harsh environments, and utilizes PT tapered port threads for a secure, leak-free pneumatic connection. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE position switches. Remember that the rear adjuster acts purely as a travel stop and does not hold the load without live air pressure; for true load-holding, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-75 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-75 |
|---|---|
| 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 SAIJ80BX850-75
| 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 SAIJ80BX850-75 Is Used
Variable End-Stop Positioning
Ideal for conveyor sorting lines where the retract position needs to be adjusted by up to 75 mm to accommodate different package sizes without changing the cylinder.
Machine Setup and Changeover
Enables fine-tuning of the 775-850 mm travel window during machine commissioning, allowing operators to dial in the exact end position without adding external mechanical stops.
Harsh Environment Actuation
The SUS304 stainless steel rod provides excellent corrosion resistance, making it suitable for wash-down areas or manufacturing environments with high moisture.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-75 the Right Cylinder?
Select this 80 mm bore model when your application requires substantial thrust—such as the 2513 N push force at 0.5 MPa—across a long 850 mm travel distance. If your force requirements are lower, stepping down to a 63 mm bore yields 1559 N push at 0.5 MPa, while moving up to a 100 mm bore provides 3927 N. The adjustable stroke is ideal for product changeovers on a line, allowing you to set variable end-stops on the fly rather than machining new hard stops or installing a fixed-stroke SAI cylinder.
Because the 850 mm stroke is quite long, the 25 mm rod diameter and M20x1.5 rod thread provide rigidity, but an external guide is strongly recommended to prevent side-loading and premature seal wear. This cylinder uses the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting the FB, CA, CB, and CR brackets. To match this exact configuration for an ISO 15552 replacement, specify the 80 mm bore, 850 mm stroke, 75 mm adjustment, PT port thread, SUS304 (B) rod material, and no 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 SAIJ80BX850-75 FAQ
At an operating pressure of 0.5 MPa, the 80 mm bore generates 2513 N of push force and 2268 N of pull force. At the maximum pressure of 1.0 MPa, it can deliver up to 513 kgf.
The rear adjuster screw allows you to shorten the nominal 850 mm stroke by up to 75 mm, providing an effective travel window of 775 to 850 mm. The adjuster acts as a mechanical stop to set the end position and does not function as a lock to hold the load without live air pressure.
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