Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-75S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 250mm 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
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-75S
The AirTAC SAIJ80X250-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a usable travel window of 175 to 250 mm. Equipped with a carbon steel rod and a PT tapered G3/8 port, it delivers a robust 4523 N of push force at 0.9 MPa. This ISO 15552 profile barrel is dimensionally interchangeable with standard cylinders, featuring dual sensor grooves for flexible mounting.
Because this SKU includes a magnet (-S), it supports AirTAC CMSE reed and DMSE electronic solid-state switches for precise end-of-stroke detection. The rear adjustment screw acts purely as a travel stop to decelerate the piston, meaning it will not hold a load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-75S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 250 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 SAIJ80X250-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×250 | 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 SAIJ80X250-75S Is Used
Machine Changeovers
Dial in the exact end-stop position during product size changeovers without physically swapping the cylinder or adding external mechanical stops.
Variable End Dwell
Adjust the retract distance on a conveyor sorting arm to handle different package lengths on the fly, tuning the travel window from 175 to 250 mm.
Commissioning Calibration
Fine-tune the final retract position during machine setup to perfect timing sequences and avoid mechanical interference without re-engineering the fixture.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-75S the Right Cylinder?
Choose this 80 mm bore if your application requires more thrust than the 63 mm bore (2182 N at 0.7 MPa) but less than the 100 mm bore (5497 N at 0.7 MPa). The 75 mm rear adjuster is ideal for product changeovers, letting you dial back the 250 mm stroke by up to 75 mm without adding external stops. When replacing an ISO 15552 cylinder, match the 250 mm stroke, 75 mm adjustment, G3/8 PT ports, and the -S magnet.
With a 250 mm stroke, the 25 mm rod diameter handles moderate side loads, but an external guide rail is recommended for heavy offset loads. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR mounts.
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 SAIJ80X250-75S FAQ
At an operating pressure of 0.9 MPa, this 80 mm bore cylinder generates 4523 N of push force and 4071 N of pull force. It can deliver a maximum thrust of 513 kgf at 1.0 MPa.
The rear adjuster screw lets you shorten the 250 mm nominal stroke by up to 75 mm, providing an adjustable travel window of 175 to 250 mm. This stopper decelerates the piston at the retract end but does not lock the load without live air pressure.
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