Airtac SAIJ80 Adjustable Cylinder SAIJ80BX750-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX750-20S 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 SAIJ80BX750-20S
The AirTAC SAIJ80X750-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers a robust 4523N of push force at 0.9 MPa and provides a usable travel window of 730-750mm, letting you dial back the nominal 750mm stroke by up to 20mm. This specific SKU includes a SUS304 stainless steel rod for superior corrosion resistance and a built-in magnet for CMSE or DMSE sensors.
The rear adjuster acts as a mechanical stop to fine-tune the retract end position during commissioning without adding external stops. Because the stroke is 750mm, the 25mm rod and M20x1.5 thread will still experience leverage forces under high side loads, so an external guide is recommended to prevent premature wear. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX750-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX750-20S |
|---|---|
| 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 SAIJ80BX750-20S
| 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 SAIJ80BX750-20S Is Used
Machine Changeover
Fine-tune the 730-750mm retract end-stop during product size transitions without physically swapping out the cylinder.
Variable End Positioning
Dial in the exact pusher distance on a packaging line, using the rear screw to compensate for mechanical drift.
Long-Stroke Forming
Apply 4523N of push force at 0.9 MPa for pressing operations, guided externally to manage the 750mm stroke leverage.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX750-20S the Right Cylinder?
Choose this 80mm bore when you need higher thrust than a 63mm cylinder (which provides 2805N push at 0.9 MPa) but want to avoid the larger footprint and 7068N force of a 100mm unit. The adjustable 20mm window is ideal for product changeovers on a line, allowing variable end-stops without swapping the cylinder. For load-holding without live air pressure, note that the rear adjuster is a travel stop, not a lock; you should instead look at an external pilot-operated check valve or the SAIL and BSAI series.
When replacing an ISO 15552 cylinder, match the 80mm bore, 750mm stroke, 20mm adjustment, PT tapered port thread, and the -S magnet requirement. The G3/8 port and 36mm cushion at both ends are standard for this bore size.
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 SAIJ80BX750-20S FAQ
The rear adjuster is a mechanical stop that lets you shorten the effective stroke by up to 20mm, creating a usable travel window of 730-750mm. It only sets the end position; it does not lock or hold the load without live air pressure.
At 0.9 MPa, the SAIJ80X750-20-S provides 4523N of push force and 4071N of pull force. The maximum thrust at 1.0 MPa is 513 kgf.
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