Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-40S 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 SAIJ80AX850-40S
The AirTAC SAIJ80X850-40-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 850 mm stroke with a 40 mm adjustment range, yielding a usable travel window of 810 to 850 mm for precise end-position tuning during commissioning. It delivers 2513 N of push force and 2268 N of pull force at 0.5 MPa, scaling up to 4523 N push at 0.9 MPa.
This variant includes an SUS420J2 stainless steel rod (option A) for improved corrosion resistance and a magnet for CMSE reed and DMSE solid-state sensors. The extruded aluminum barrel incorporates sensor grooves on both sides. The rear adjuster acts purely as a mechanical stop to set the travel end and deceleration point; it does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-40S |
|---|---|
| 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 SAIJ80AX850-40S
| 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 SAIJ80AX850-40S Is Used
Variable End Stops
Dial in the exact 810-850 mm travel distance during machine commissioning to accommodate different material lengths without physical cylinder swaps.
Product Changeover
Quickly adjust the retract position for varying package sizes on a packaging line using the 40 mm rear stopper range.
Long-Stroke Assembly
Leverage the 850 mm stroke and 4523 N peak thrust for large press or material handling tasks requiring precise end-of-travel tuning.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-40S the Right Cylinder?
Select this 80 mm bore cylinder when your application requires 2513 N of push force at 0.5 MPa, stepping up from a 63 mm bore that provides 1559 N. The adjustable stroke is ideal for machine setups requiring variable end stops or product-size changeovers without swapping the cylinder or adding external stops. Because the stroke is 850 mm, an external guide is recommended to manage side loads on the 25 mm rod and M20x1.5 thread.
For dimensionally interchangeable ISO 15552 replacements, match the 80 mm bore, 850 mm stroke, 40 mm adjustment, PT tapered port threads, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. If you need true load-holding without live air, use an external rod lock or pilot-operated check valve, or select the SAIL or BSAI series 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 SAIJ80AX850-40S FAQ
At 0.5 MPa, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At 0.9 MPa, the push force increases to 4523 N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel from the nominal 850 mm down to 810 mm. It sets the travel end and deceleration point but does not lock or hold the load without live air pressure.
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