Airtac SAIJ100 Adjustable Cylinder SAIJ100X25-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X25-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 25mm 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
- Stroke25 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100X25-20S
The AirTAC SAIJ100X25-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers 3927N of push force at 0.5 MPa and provides a usable travel window of 5 to 25mm. A standard carbon steel rod and PT tapered port threads are equipped, while the integrated magnet (-S) supports CMSE reed and DMSE electronic sensors for precise position detection.
Because the rear stopper can trim up to 20mm of travel, this cylinder excels at fine-tuning end positions during commissioning without adding external stops. The adjuster acts solely as a travel stop and relies on the variable air cushions for end-of-stroke deceleration; it does not hold the load without live air pressure. For load-holding without air, consider an external rod lock or related SAIL and BSAI series.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X25-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X25-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 25 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 SAIJ100X25-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×25 | 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 SAIJ100X25-20S Is Used
Precision End-Stop Tuning
Dial in the exact clamping position on machining fixtures within a 5-25mm window, allowing rapid calibration during machine commissioning without swapping cylinders.
Product Size Changeover
Quickly adjust the effective stroke by up to 20mm to accommodate varying product dimensions on a packaging line, reducing setup time between production runs.
Variable Positioning Stops
Set precise retract limits on heavy-duty conveyor diverters, leveraging the 3927N push force to handle substantial loads while fine-tuning the travel end.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X25-20S the Right Cylinder?
Choose this 100mm bore adjustable cylinder when your application requires high force (3927N push at 0.5 MPa) and exact end-position tuning within a 5-25mm window. If you need less force, stepping down to an 80mm bore yields 2513N push force. The SAIJ is selected over a fixed-stroke SAI when machine setups require variable end stops or product-size changeovers. The 25mm nominal stroke keeps the rod fully supported, minimizing side-load risks.
When replacing an ISO 15552 cylinder, match the 100mm bore, 25mm stroke, 20mm adjustment range, G1/2 port, and Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting interface. Ensure you specify the -S magnet for CMSE/DMSE sensor compatibility. Remember that the rear adjuster is a stop, not a lock; use SAIL or BSAI cylinders if your setup demands true load-holding without continuous air pressure.
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 SAIJ100X25-20S FAQ
At 0.5 MPa operating pressure, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 801 kgf.
The rear adjusting screw acts as a mechanical stop that can shorten the nominal 25mm stroke by up to 20mm, giving a usable travel window of 5 to 25mm. This allows precise end-position tuning during setup without external stops, though it does not lock the load without live air.
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