Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 85mm 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
- Stroke85 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-40S
The AirTAC SAIJ80X85-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 2513 N of push force and 2268 N of pull force at 0.5 MPa, featuring a 25 mm SUS420J2 stainless steel rod. The built-in rear stopper allows you to trim the nominal 85 mm stroke back by up to 40 mm, creating a precise 45 to 85 mm usable travel window for fine-tuning during commissioning.
This model includes a magnetic piston (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic solid-state sensors, which seat neatly into the dual sensor grooves on the extruded aluminum barrel. It uses a G3/8 PT tapered port and achieves a standard speed range of 30-800 mm/s. The adjuster functions strictly as a travel stop for end-position tuning, not as a lock, meaning live air is required to maintain the load.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 85 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 SAIJ80AX85-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×85 | 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 SAIJ80AX85-40S Is Used
Product Changeover
Dial in the 45-85 mm travel window on the fly to accommodate varying package sizes on a packaging line without changing out the cylinder.
End-Stop Calibration
Fine-tune the retraction end position during machine commissioning to perfectly seat components without adding external mechanical stops.
Assembly Pressing
Leverage the 2513 N push force at 0.5 MPa for pressing bearings or pins, using the rear adjuster to set precise pressing depth limits.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-40S the Right Cylinder?
Choose this 80 mm bore when an application requires higher thrust than a 63 mm cylinder (which provides 1559 N push at 0.5 MPa) but has physical constraints preventing a step up to the 100 mm bore. The adjustable 45-85 mm window is ideal for machine setups requiring variable end-stops or product-size changeovers, eliminating the need to physically swap cylinders or bolt on external stops as you would with a fixed-stroke SAI model.
For an exact ISO 15552 replacement, match the 80 mm bore, 85 mm stroke, 40 mm adjustment, G3/8 PT port, and -S magnet. The available mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the stroke is under 300 mm, side-load stress is minimal, though external guides should still be used for heavy lateral loads. If true load-holding without live air pressure is needed, consider the SAIL or BSAI series instead of relying on the rear stopper.
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 SAIJ80AX85-40S 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 adjusting screw acts as a mechanical stop that allows you to shorten the effective stroke by up to 40 mm. This turns the nominal 85 mm stroke into a 45 to 85 mm adjustable travel window. It only sets the end position and does not lock the load.
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