Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-50 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 SAIJ80X250-50
The AirTAC SAIJ80X250-50 is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster, letting you trim the effective travel down to a 200-250 mm window. It delivers 2513 N of push force at 0.5 MPa and uses a G3/8 port for pneumatic supply. The extruded aluminum barrel features sensor grooves on both sides for straightforward position detection.
Turning the external rear stopper lets you dial in the exact retract position during commissioning or product changeover without swapping hardware. The adjuster acts purely as a travel stop and works alongside the standard 36 mm air cushions to decelerate the load; it does not hold the rod in place without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-50 |
|---|---|
| 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 SAIJ80X250-50
| 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 SAIJ80X250-50 Is Used
Variable End-Stop Positioning
Dial in the retract distance within the 200-250 mm window to accommodate varying material thicknesses without reinstalling the cylinder.
Machine Changeover
Quickly adjust the stroke stopper during product line format changes to set new end positions rapidly and reduce downtime.
Assembly Press Tuning
Fine-tune the pressing depth at commissioning by turning the rear screw, achieving exact positioning without adding external mechanical stops.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-50 the Right Cylinder?
Choose this 80 mm bore when your application requires high thrust but the exact end-of-stroke varies by product size. If you need less force, stepping down to a 63 mm bore yields 1559 N at 0.5 MPa; stepping up to a 100 mm bore provides 3927 N. The 50 mm adjustment range here is ideal for machinery requiring frequent format changes.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 250 mm nominal stroke, 50 mm adjuster, PT tapered port thread, and carbon steel rod. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Since the stroke is 250 mm, ensure adequate external guidance for long unsupported rods to prevent side-loading damage.
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 SAIJ80X250-50 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. It can deliver up to 4523 N push force at 0.9 MPa.
The rear stopper screw allows you to shorten the 250 mm nominal stroke by up to 50 mm, creating a usable travel window of 200 to 250 mm. This stopper only sets the end position and does not lock the load without continuous air pressure.
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