Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-30
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-30 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 SAIJ80X250-30
The AirTAC SAIJ80X250-30 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 250 mm stroke that can be fine-tuned backward by up to 30 mm, creating a usable travel window of 220-250 mm. This on-machine adjustability allows you to dial in exact end positions during commissioning without swapping hardware or adding external stops. Delivering 4523 N of push force at 0.9 MPa, it fits medium to heavy-duty applications.
The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches, though this specific configuration ships without a magnet. The robust 25 mm carbon steel rod and M20x1.5 thread handle high side loads, while the G3/8 port supports a 30-800 mm/s speed range. It uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-30 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-30 |
|---|---|
| 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 SAIJ80X250-30
| 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 SAIJ80X250-30 Is Used
Changeover Calibration
Fine-tune the retract position by up to 30 mm during product size changeovers without disassembling the actuator or adding shims.
Assembly Pressing
Dial in the exact 220-250 mm travel window for pressing bearings or pins, accommodating material thickness variations on the fly.
End-Stop Trimming
Shorten the effective stroke during initial machine commissioning to prevent tooling crashes before locking down the final position.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-30 the Right Cylinder?
Select this 80 mm bore actuator when your application requires 4523 N of push force at 0.9 MPa and variable end-stops. If your process demands less force, stepping down to a 63 mm bore yields 2805 N at 0.9 MPa; for heavier loads, a 100 mm bore provides 7068 N. Choose the SAIJ adjustable-stroke variant over a fixed SAI cylinder when you need precise retract-end tuning during product changeovers. Remember that the rear adjuster functions strictly as a travel stop, not a lock. The cylinder will not hold a load without live air pressure; for true load-holding, use an external rod lock or explore AirTAC SAIL or BSAI clamp-lock models.
Because this unit features a 250 mm stroke, the extended 25 mm carbon steel rod is subject to bending moments under heavy lateral loads. Always guide the tooling externally to prevent rod damage. For a direct ISO 15552 replacement match, specify an 80 mm bore, 250 mm stroke, 30 mm adjustment, PT tapered port threads, and the required mounting bracket.
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 SAIJ80X250-30 FAQ
It features a rear external stopper screw that lets you trim the effective travel back by up to 30 mm, providing a usable stroke window of 220-250 mm. The adjuster acts only as a mechanical stop and does not lock the load without continuous air pressure.
At an operating pressure of 0.9 MPa, the SAIJ80X250-30 generates 4523 N of push force and 4070 N of pull force. It can deliver a maximum thrust of 513 kgf at 1.0 MPa.
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