Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-75
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-75 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 SAIJ80X250-75
The AirTAC SAIJ80X250-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 2513N push force at 0.5 MPa and utilizes a G3/8 port. The integrated adjuster allows you to trim the nominal 250mm stroke back by up to 75mm, creating a precise 175-250mm usable travel window for product changeovers.
This model uses a carbon steel piston rod with an M20x1.5 thread, providing robust resistance to side loads. It supports variable air cushions at both ends to decelerate moving loads. Note that the rear adjuster and cushions act as travel stops and deceleration devices, not locks; for load-holding without live air pressure, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-75 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-75 |
|---|---|
| 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 SAIJ80X250-75
| 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 SAIJ80X250-75 Is Used
Variable End-Stop Tuning
Dial in the exact retract position within the 175-250mm window during machine commissioning to accommodate different material thicknesses without hardware changes.
Product Changeover
Quickly adjust the stroke length by up to 75mm when switching the production line to a new package size, minimizing downtime between runs.
Assembly Pressing
Leverage the 2513N push force at 0.5 MPa for pressing operations, using the rear screw to precisely set the pressing depth limit.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-75 the Right Cylinder?
Choose this 80mm bore when you need higher thrust than a 63mm cylinder (which provides 1559N at 0.5 MPa) but want to avoid the bulk of a 100mm unit. The 75mm adjustment range is ideal for machines running multiple product sizes, allowing you to fine-tune the retract end position at commissioning without swapping the cylinder or adding external stops. For fixed-travel setups, a standard SAI cylinder suffices.
As a dimensionally interchangeable ISO 15552 cylinder, it matches standard mounting footprints. The available mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). It uses PT tapered ports and standard carbon steel rod material. Because the 250mm stroke is significant, ensure an external guide supports long unsupported loads to prevent rod bending.
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 SAIJ80X250-75 FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides a push force of 2513N and a pull force of 2268N. At 0.7 MPa, the push force increases to 3518N.
The rear adjuster screw lets you shorten the effective travel from the 250mm nominal stroke down by up to 75mm, providing a usable 175-250mm window. It acts as a mechanical stop to set the end position and does not lock the load without live air pressure.
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