Airtac SAIJ100 Adjustable Cylinder SAIJ100AX120-40
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100AX120-40 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 SAIJ100AX120-40
The AirTAC SAIJ100X120-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 40 mm. This creates a highly versatile 80-120 mm usable stroke window, letting you dial in the exact retract end-position during commissioning without swapping out the cylinder or adding bulky external stops. It delivers robust thrust, pushing with 3927 N and pulling with 3681 N at 0.5 MPa, making it suitable for heavy-duty positioning tasks.
This specific SKU is configured with a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and features PT (tapered) port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic solid-state switches. Unlike a SAIL or BSAI cylinder, the rear adjuster on this model acts purely as a travel stop and deceleration point—it will not hold the load safely without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100AX120-40 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100AX120-40 |
|---|---|
| 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 SAIJ100AX120-40
| 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 SAIJ100AX120-40 Is Used
Machine Changeover
Rapidly fine-tune the 80-120 mm retract end-stop during product size transitions on a packaging line without disassembling the actuator.
Variable End-Stop Positioning
Dial in the exact clamping depth for assemblies requiring slight dimensional adjustments between production runs.
Heavy-Duty Ejection
Leverage the 3927 N push force at 0.5 MPa to reliably knock heavy finished parts out of a fixture, with the adjuster absorbing final impact.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX120-40 the Right Cylinder?
Choose this 100 mm bore when a 63 mm bore (providing 1559 N push force at 0.5 MPa) is insufficient to move your load, but you want to avoid stepping up to a massive 125 mm body. The adjustable 80-120 mm window is ideal for product changeovers on a line where slight variations in end-stop position are needed. If your machine requires true load-holding without continuous air pressure, you must pair this cylinder with an external pilot-operated check valve or select a different series like SAIL or BSAI. To match this ISO 15552 footprint exactly, ensure your replacement uses a 100 mm bore, 120 mm stroke, 40 mm adjustment range, PT ports, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting styles.
Because the nominal stroke is 120 mm, side-loading is less of a concern than with longer strokes, but the 25 mm rod diameter and M20x1.5 rod thread still provide excellent rigidity for offset loads. Always guide the load externally if side forces are present.
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 SAIJ100AX120-40 FAQ
At 0.5 MPa it provides 3927 N of push force and 3681 N of pull force. If you increase the operating pressure to 0.7 MPa, the push force rises to 5497 N.
The rear external screw allows you to shorten the 120 mm nominal stroke by up to 40 mm, giving you an adjustable travel window between 80 and 120 mm. The adjuster acts as a mechanical stop for end-position tuning and is not a locking device.
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