Airtac SAIJ100 Adjustable Cylinder SAIJ100X40-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X40-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 40mm 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
- Stroke40 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100X40-20S
The AirTAC SAIJ100X40-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 20 to 40 mm. Delivering 3927 N of push force at 0.5 MPa, this unit handles substantial loads while allowing exact end-position calibration during commissioning. The extruded aluminum barrel features sensor grooves on both sides for flexible switch placement.
Fitted with a carbon steel rod and a PT tapered G1/2 port, it supports robust pneumatic flow. The integrated -S magnet enables position detection via AirTAC CMSE reed or DMSE electronic solid-state sensors. The rear adjustment screw acts purely as a mechanical stop to fine-tune the retract distance, meaning it does not lock the load without continuous air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X40-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X40-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 40 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 SAIJ100X40-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×40 | 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 SAIJ100X40-20S Is Used
Short-Stroke Pressing
Dial in the exact 20 to 40 mm retract position for high-force pressing and seating tasks during machine setup.
Product Changeover
Quickly adjust the end-stop to accommodate varying material thicknesses on the line without swapping the actuator.
End-Position Calibration
Fine-tune the final retract distance at commissioning to achieve precise alignment in compact assembly fixtures.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X40-20S the Right Cylinder?
Select this 100 mm bore when an application demands high thrust—such as 3927 N at 0.5 MPa—within a very short 20 to 40 mm travel window. If your setup requires less force, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa, whereas moving up to a 125 mm bore provides 6136 N. The adjustable stroke is chosen over a fixed SAI cylinder when you need variable end-stops for product changeovers without machining external stops. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. For load-holding without live air, consider an external rod lock or the SAIL series.
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 SAIJ100X40-20S 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 allows you to trim the nominal 40 mm stroke back by up to 20 mm, creating a usable travel window of 20 to 40 mm. The adjuster functions as a mechanical stop and does not hold the load without live air pressure.
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