Airtac SAIJ100 Adjustable Cylinder SAIJ100X25-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X25-20 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 SAIJ100X25-20
The AirTAC SAIJ100X25-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 5 to 25 mm, letting you dial back the 25 mm nominal stroke by up to 20 mm during commissioning without external stops. It delivers 3927 N of push force at 0.5 MPa and uses a G1/2 port.
The carbon steel rod with an M20x1.5 thread handles robust loads, while the extruded aluminum barrel includes sensor grooves on both sides for CMSE reed or DMSE electronic switches. The rear adjuster acts purely as a travel stop for deceleration, not a lock, so live air is required to hold the load.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X25-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X25-20 |
|---|---|
| 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 SAIJ100X25-20
| 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 SAIJ100X25-20 Is Used
Short-Stroke Pressing
Dial in the exact 5 to 25 mm contact distance for pressing small components during machine commissioning.
Product Changeover
Quickly adjust the end-stop position by up to 20 mm to accommodate varying product sizes on the same line.
End-Stop Calibration
Fine-tune the retract position without swapping cylinders or adding external mechanical stops.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X25-20 the Right Cylinder?
Choose this 100 mm bore when 50 mm (982 N at 0.5 MPa) is too weak but 125 mm (6136 N) is oversized. The adjustable stroke is ideal for machine setups requiring variable end-stops, offering fine-tuning that a fixed SAI cylinder cannot match. To replace an ISO 15552 unit, match the 100 mm bore, 25 mm stroke, 20 mm adjustment, PT port, and standard carbon steel rod.
For any application needing the piston to hold its position without continuous air pressure, select a SAIL lock or BSAI clamp-lock cylinder instead, as the SAIJ adjuster does not function as a brake.
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 SAIJ100X25-20 FAQ
At 0.5 MPa operating pressure, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. At 0.7 MPa, the push force increases to 5497 N.
The rear adjuster screw lets you shorten the 25 mm nominal stroke, providing a usable travel window of 5 to 25 mm. This stop mechanism sets the end position but does not lock the load without live air.
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