Airtac SAIJ80 Adjustable Cylinder SAIJ80X70-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X70-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 70mm 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
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X70-40
The AirTAC SAIJ80X70-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 30-70 mm usable travel window by allowing you to dial back the 70 mm nominal stroke by up to 40 mm without adding external stops. In the 80 mm bore class, it delivers 2513 N of push force and 2268 N of pull force at 0.5 MPa, making it well-suited for medium-to-heavy actuation. The extruded aluminum barrel includes sensor grooves on both sides, and the PT tapered port threads ensure a tight, reliable pneumatic connection.
This model uses a 25 mm carbon steel piston rod with an M20x1.5 thread, offering robust resistance to side loading. The rear adjuster functions strictly as a travel stop to fine-tune the end position during commissioning; it does not lock or hold the load without live air pressure. For applications requiring position holding without continuous air, consider the SAIL (air-released lock) or BSAI (clamp-lock) variants. This cylinder supports speeds of 30-800 mm/s and includes variable air cushions at both ends to manage impact deceleration.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X70-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X70-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 70 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 SAIJ80X70-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×70 | 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 SAIJ80X70-40 Is Used
Machine Changeover
Dial in the exact 30-70 mm end-stop during product size transitions on a packaging line without swapping out the physical cylinder.
Assembly Pressing
Apply up to 2513 N of precise pressing force at 0.5 MPa, fine-tuning the travel distance to accommodate varying material thicknesses.
End-Position Tuning
Use the rear adjuster to compensate for mechanical wear or setup tolerances, ensuring the tooling lands exactly where needed every cycle.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X70-40 the Right Cylinder?
Choose the 80 mm bore when your application requires substantial force, such as the 2513 N push available here at 0.5 MPa. If your load is lighter, stepping down to a 63 mm bore yields 1559 N, while moving up to a 100 mm bore provides 3927 N for heavier demands. The adjustable stroke is ideal for machine setups requiring precise end-position tuning during product changeovers, avoiding the need to physically swap cylinders or bolt on external stoppers.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 70 mm stroke, 40 mm adjustment range, and PT port threads. The SAIJ mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR styles. Because this is a non-magnet model, position sensing requires adding a magnet (-S) to use CMSE reed or DMSE electronic solid-state switches. Although the stroke is short, always ensure proper guiding for any side loads.
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 SAIJ80X70-40 FAQ
At 0.5 MPa, the SAIJ80X70-40 delivers 2513 N of push force and 2268 N of pull force. At the maximum operating pressure of 1.0 MPa, it can achieve up to 513 kgf.
The rear adjuster acts as a mechanical stop that lets you trim the 70 mm nominal stroke back by up to 40 mm, creating a 30-70 mm usable travel window. It sets the end position but does not lock the load without live air pressure.
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