Airtac SAIJ100 Adjustable Cylinder SAIJ100X70-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X70-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 70mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ100 mm
- Stroke70 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100X70-20
The AirTAC SAIJ100X70-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 3927N of push force at 0.5 MPa. Its integrated 20mm adjustment screw allows you to dial back the 70mm nominal stroke, creating a precise 50-70mm usable travel window without adding external stops. This feature is ideal for fine-tuning end positions during machine commissioning or product changeovers.
Built with a carbon steel piston rod and a G1/2 PT port, this extruded aluminum barrel design omits the FB, CA, CB, and CR mounts, utilizing a reduced set of ISO 15552 mounting options (Basic, FA, LB, TC, FTC, TCM1, TCM2). The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure. For load-holding requirements, an external rod lock or related SAIL lock cylinder is required.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X70-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X70-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 70 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100X70-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | 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 SAIJ100 Adjustable Cylinder SAIJ100X70-20 Is Used
Machine Changeover
Quickly adjust the 50-70mm travel window during product size changes on a packaging line without swapping the cylinder.
End-Position Tuning
Fine-tune the retract stroke at commissioning to dial in exact clamping or pressing distances against mechanical tolerances.
Variable End Stops
Use the rear adjusting screw to set precise stopping points for heavy-duty assembly fixtures requiring 3927N of push force.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X70-20 the Right Cylinder?
Selecting the SAIJ100X70-20 makes sense when your application needs exact retract end-position tuning rather than a fixed stop. If 3927N of push force at 0.5 MPa is excessive, stepping down to an 80mm bore yields 2513N, whereas moving up to a 125mm bore provides 6136N. The 20mm adjustment window on this 70mm stroke allows you to compensate for mechanical tolerances directly at setup.
When replacing an ISO 15552 cylinder, match the 100mm bore, 70mm stroke, G1/2 PT port, and mounting style. Because the stroke is under 300mm, side-load stress on the 25mm rod is minimal, though external guides are still recommended for heavy lateral loads. This standard configuration lacks a magnet, so position sensing requires adding the -S option for CMSE reed or DMSE electronic sensors.
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 SAIJ100 Adjustable Cylinder SAIJ100X70-20 FAQ
At 0.5 MPa operating pressure, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. At 0.7 MPa, the push force increases to 5497N.
The SAIJ100X70-20 features a rear adjusting screw that acts as a stopper, allowing you to shorten the 70mm nominal stroke by up to 20mm. This creates a 50-70mm usable travel window for fine-tuning the retract end position.
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