Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-75S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 125mm 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
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-75S
The AirTAC SAIJ80X125-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering robust performance with a 2513N push force at 0.5 MPa. Because this specific SKU carries a 75mm adjustment code on a 125mm nominal stroke, you gain a wide usable travel window of 50-125mm. This allows operators to dial in the exact retract end-position during commissioning without swapping out the physical cylinder or adding external stops.
The extruded aluminum barrel features sensor grooves on both sides, and this model includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic solid-state switches. It uses a G3/8 port and a 25mm carbon steel rod with an M20x1.5 thread. The rear adjuster acts purely as a mechanical stop to set the travel end, meaning it does not lock or hold the load without live air pressure. For applications requiring position holding, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-75S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 125 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 SAIJ80X125-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×125 | 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 SAIJ80X125-75S Is Used
Machine Changeovers
Quickly adapt to different product sizes by adjusting the retract stroke from 125mm down to 50mm without changing cylinder mounts.
Variable End Stops
Fine-tune the stopping position of pallets or packages on a conveyor line during initial setup to ensure perfect alignment.
Assembly Pressing
Control the pressing depth of components precisely at commissioning, using the rear stopper to set the exact 50-125mm travel distance.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-75S the Right Cylinder?
Choose this 80mm bore when you need significantly more thrust than a 63mm cylinder (which provides 1402N pull at 0.5 MPa) but want to avoid the larger footprint of a 100mm option. The adjustable stroke is perfect for product-size changeovers on a packaging line, letting you shorten the stroke by up to 75mm on the fly. When replacing an ISO 15552 cylinder, match the 125mm stroke, 75mm adjustment, PT tapered port thread, and the -S magnet requirement.
Although the 25mm rod handles side loads well, any application approaching the maximum standard stroke limits should still use an external guide to prevent rod binding. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR configurations.
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 SAIJ80X125-75S FAQ
The rear adjuster screw acts as a mechanical stop, allowing you to trim the effective stroke back by up to 75mm. This creates a usable travel window of 50-125mm, which is set at commissioning and does not lock the load without live air.
At 0.5 MPa operating pressure, it provides 2513N of push force and 2268N of pull force. At 0.7 MPa, the push force increases to 3518N.
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