Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-75S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-75S 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 SAIJ80AX850-75S
The AirTAC SAIJ80X850-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 4523N of push force at 0.9 MPa and features a 25mm piston rod with an M20x1.5 thread. Because of the 75mm adjustment code, the effective travel window spans 775 to 850mm, allowing precise end-position tuning without swapping out the entire unit.
This variant includes an -S magnet for position sensing alongside a SUS420J2 stainless steel rod (code A) for superior corrosion resistance. The extruded aluminum barrel incorporates sensor grooves on both sides, compatible with AirTAC CMSE reed and DMSE electronic solid-state switches. Fluid must be filtered to 40 um, operating within a 0.15-1.0 MPa pressure range.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-75S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-75S |
|---|---|
| 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 SAIJ80AX850-75S
| 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 SAIJ80AX850-75S Is Used
Long-Stroke Changeover
Dial in the retract position by up to 75mm during product size changes on a packaging line, avoiding the need to physically swap out an 850mm cylinder.
End-Position Trimming
Fine-tune the final resting position of a heavy push-off mechanism at commissioning, using the rear stopper to perfectly align materials without adding external hard stops.
Variable End Stops
Adjust the effective stroke window between 775mm and 850mm on a sorting diverter to accommodate varying package lengths on the fly.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-75S the Right Cylinder?
Choose this 80mm bore when an application requires higher thrust than a 63mm cylinder (which provides 2805N push at 0.9 MPa) but does not need the full 7068N output of a 100mm unit. The adjustable stroke is perfect for machine setup and product changeover, letting you dial in the exact retract end-position on the fly instead of installing external stops. For any stroke length of 850mm, the extended travel demands an external guide to prevent excessive side-loading on the rod.
When specifying an ISO 15552 replacement, match the 80mm bore, 850mm stroke, 75mm adjustment range, PT tapered port threads, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding without pressure, consider an external rod lock or a SAIL/BSAI cylinder.
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 SAIJ80AX850-75S FAQ
This 80mm bore cylinder provides 2513N of push force and 2268N of pull force at 0.5 MPa. At 0.9 MPa, the push force increases to 4523N.
The rear adjuster screw allows you to shorten the 850mm nominal stroke by up to 75mm, creating a usable travel window of 775mm to 850mm. This stopper sets the end position but does not lock the load without continuous air pressure.
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