Airtac SAIJ100 Adjustable Cylinder SAIJ100AX120-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100AX120-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 120mm 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
- Stroke120 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX120-20
The AirTAC SAIJ100X120-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 100 to 120 mm, allowing you to dial back the nominal 120 mm stroke by up to 20 mm during commissioning without adding external stops. The 100 mm bore generates 3927 N of push force at 0.5 MPa, making it suited for heavy positioning tasks.
This model uses a SUS420J2 stainless steel rod (material code A) for enhanced resistance to wear and corrosion. The extruded aluminum barrel includes sensor grooves on both sides, and the pneumatic porting is PT tapered G1/2. The variable air cushions at both ends decelerate the load, but the adjuster acts only as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100AX120-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100AX120-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 120 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 SAIJ100AX120-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×120 | 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 SAIJ100AX120-20 Is Used
Machine Changeover
Fine-tune the 100-120 mm travel window to accommodate slightly different product lengths during line changeovers without swapping hardware.
Variable End Stops
Use the rear adjusting screw to set precise retract positions for clamping or pressing tasks that require strict depth control.
Heavy Positioning
Leverage the 3927 N push force at 0.5 MPa to move heavy pallets or fixtures, relying on the built-in air cushion for smooth stops.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX120-20 the Right Cylinder?
Select this 100 mm bore when a 63 mm bore (1559 N push at 0.5 MPa) is insufficient, but a 125 mm bore (6136 N) would be overkill. You would choose the SAIJ adjustable-stroke format over a fixed SAI cylinder when you need precise end-position tuning for product changeovers on a machine. To match this SKU exactly: 100 mm bore, 120 mm stroke, 20 mm adjustment, PT G1/2 port, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting, and no magnet (-S). Because the 120 mm stroke is relatively short, side-loading is less of a concern than on longer strokes, but an external guide is still recommended for heavy loads. For load-holding without live pressure, consider a SAIL or BSAI cylinder instead.
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 SAIJ100AX120-20 FAQ
At a 0.5 MPa operating pressure, the 100 mm bore 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 acts as a mechanical stop that lets you shorten the effective travel from the nominal 120 mm down to 100 mm. It only sets the end position and does not lock or hold the load without continuous air pressure.
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