Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-75
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-75 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 SAIJ80AX850-75
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. With a nominal 850 mm stroke and a 75 mm adjustment range, you get a usable 775-850 mm travel window for precise end-position tuning during commissioning. The 80 mm bore delivers 4523N of push force at 0.9 MPa, making it suited for heavy-duty positioning tasks.
This unit uses a SUS420J2 stainless steel rod for enhanced corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. Remember that the rear adjuster acts purely as a travel stop to control deceleration alongside the air cushions; it does not lock the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-75 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-75 |
|---|---|
| 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 SAIJ80AX850-75
| 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 SAIJ80AX850-75 Is Used
Variable End-Stop Tuning
Dial in the exact 775-850 mm end position during machine commissioning to accommodate varying product lengths without replacing the entire cylinder.
Product Changeover
Quickly adjust the rear stopper on a packaging line when switching between different package sizes, saving setup time and avoiding external stop hardware.
Heavy-Duty Positioning
Leverage the 4523N push force at 0.9 MPa to move heavy pallets or transfer assemblies, using the adjustable stroke to fine-tune the final resting position.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-75 the Right Cylinder?
Select this 80 mm bore cylinder when an application requires substantial thrust, stepping up from a 63 mm bore that provides 2805N push at 0.9 MPa, or stepping down from a 100 mm bore offering 7068N. The adjustable stroke is ideal for machine setups requiring variable end stops or product-size changeovers, eliminating the need to swap out a fixed-stroke SAI cylinder or bolt on external stops. Because the 850 mm stroke is long, an external guide is recommended to prevent excessive side-loading on the rod and thread.
For ISO 15552 dimensional interchangeability, match the 80 mm bore, 850 mm stroke, 75 mm adjustment, PT G3/8 ports, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). If your process requires the load to be held mechanically without live air, use an SAIL air-released lock cylinder or a BSAI clamp-lock instead of relying on the adjuster.
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 SAIJ80AX850-75 FAQ
The rear adjuster screw acts as a mechanical stop that lets you shorten the 850 mm nominal stroke by up to 75 mm, providing a usable travel window of 775-850 mm. It works with the variable air cushions to set the end position, but it is not a lock and will not hold the load without live air pressure.
At 0.9 MPa operating pressure, the SAIJ80X850-75 provides 4523N of push force and 2268N of pull force. It can achieve a maximum thrust of 513 kgf at 1.0 MPa.
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