Airtac SAIJ80 Adjustable Cylinder SAIJ80BX750-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX750-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 750mm 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
- Stroke750 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX750-40S
The AirTAC SAIJ80X750-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers a robust 4523N push force at 0.9 MPa, utilizing a 25mm carbon steel rod and G3/8 PT ports. The integrated -40 mm adjustment mechanism allows you to fine-tune the effective travel window down from a 750 mm nominal stroke to a precise 710 mm limit. This eliminates the need to swap out the entire cylinder or bolt on external stops during product changeovers.
Built with a SUS304 stainless steel rod (option B), this unit resists corrosion in humid environments. It includes a magnet (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic solid-state sensors, which seat neatly into the dual-side sensor grooves on the extruded aluminum barrel. The rear adjuster acts purely as a mechanical stop to set the retract end-position; it does not lock the load or hold position without live air pressure. For load-holding requirements without continuous air, an external rod lock or the AirTAC SAIL/BSAI series is required.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX750-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX750-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 750 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 SAIJ80BX750-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×750 | 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 SAIJ80BX750-40S Is Used
Variable End-Position Damping
Fine-tune the retract stroke from 710 to 750 mm to perfectly dampen long-travel movements on large packaging equipment without changing out the cylinder.
Product Size Changeover
Quickly adapt the stroke length on a conveyor sorting line to accommodate different package sizes by turning the rear stopper screw during line setup.
Long-Stroke Machine Setup
Dial in the exact end-of-travel position for heavy material pushers during initial commissioning, using the 40mm adjustment window to perfect the mechanical timing.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX750-40S the Right Cylinder?
Selecting this 80mm bore cylinder makes sense when your application requires the 4523N thrust at 0.9 MPa (or 2513N at 0.5 MPa) and a highly variable end-stop. If your force requirements are lower, stepping down to a 63mm bore yields 2805N at 0.9 MPa, whereas moving up to a 100mm bore provides 7068N. The adjustable 710-750 mm travel window is perfect for dialing in exact end positions at commissioning without machining custom spacers.
Because this model features a 750 mm stroke, the 25mm rod and M20x1.5 thread will still experience leverage forces over that distance; an external guide rail is strongly recommended to prevent side-loading damage. When replacing an ISO 15552 cylinder, match the 80mm bore, 750mm stroke, -40mm adjustment, PT G3/8 port, and -S magnet. The SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR footprints.
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 SAIJ80BX750-40S 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 and the pull force to 4523N. The maximum operating pressure is 1.0 MPa.
The rear adjuster acts as a mechanical stop that allows you to shorten the effective travel from the 750mm nominal stroke down to 710mm. It sets the retract end-position but does not lock the load; live air pressure is still required to hold position.
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