Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-75S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-75S 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 SAIJ80BX85-75S
The AirTAC SAIJ80X85-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2513 N push force at 0.5 MPa, featuring an extruded aluminum barrel with sensor grooves on both sides. This specific SKU provides a usable travel window of 10 to 85 mm, allowing you to dial back the nominal 85 mm stroke by up to 75 mm during commissioning.
This model includes a SUS304 stainless steel rod for superior corrosion resistance and ships with a -S magnet for position sensing. It operates at speeds between 30 and 800 mm/s and uses a PT tapered G3/8 port. The rear adjuster acts purely as a mechanical stop to fine-tune the retract position without requiring external stops, but it does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-75S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-75S |
|---|---|
| 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 SAIJ80BX85-75S
| 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 SAIJ80BX85-75S Is Used
Variable End-Stop Tuning
Dial in the exact retract position within the 10-85 mm window during machine commissioning without adding external mechanical stops.
Product Size Changeover
Quickly adjust the cylinder's effective stroke on packaging lines when switching between different product sizes or formats.
Corrosive Environment Actuation
Leverage the SUS304 stainless steel rod and 2513 N thrust for precise clamping in environments requiring high corrosion resistance.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-75S 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 without the larger footprint of a 100 mm unit. The adjustable stroke is ideal for machine setups requiring variable end-stops or frequent product-size changeovers, negating the need to physically swap out a fixed-stroke SAI cylinder. To replace an ISO 15552 cylinder, match the 80 mm bore, 85 mm stroke, 75 mm adjustment, PT G3/8 port, and the -S magnet.
Because the 85 mm stroke is relatively short, side-loading is less of a concern than with longer strokes, but the 25 mm rod diameter still handles standard operational stresses well. Remember that the rear screw adjuster and the variable air cushions only decelerate the travel end; they do not function as a lock. For load-holding without live air pressure, consider an AirTAC SAIL or BSAI cylinder. The available mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ80BX85-75S 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 adjuster screw allows you to mechanically shorten the effective travel from the nominal 85 mm down to as little as 10 mm. This creates a 10-85 mm usable stroke window for fine-tuning the end position at commissioning.
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