Airtac SAIJ100 Adjustable Cylinder SAIJ100AX120-50
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100AX120-50 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 SAIJ100AX120-50
The AirTAC SAIJ100X120-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 70 to 120 mm, allowing you to dial back the 120 mm nominal stroke by up to 50 mm. In the 100 mm bore class, it generates 3927 N of push force and 3681 N of pull force at 0.5 MPa, making it suited for medium-to-heavy industrial motion tasks.
This variant is configured with a SUS420J2 stainless steel rod (material code A) for improved corrosion resistance over standard carbon steel. The 25 mm rod and M20x1.5 thread provide robust connectivity, while the PT tapered port threads (G1/2) ensure a positive, leak-free pneumatic seal. The extruded aluminum barrel includes sensor grooves on both sides, ready for DMSE solid-state or CMSE reed switches if a magnet is added later.
Airtac SAIJ100 Adjustable Cylinder SAIJ100AX120-50 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100AX120-50 |
|---|---|
| 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 SAIJ100AX120-50
| 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 SAIJ100AX120-50 Is Used
Machine Changeover
Dial in the 70-120 mm travel window during product size transitions to set new end positions without swapping out the cylinder.
Variable End Stops
Use the rear adjuster to precisely set the retract position for multi-stage tooling operations requiring exact distances.
Heavy Payload Positioning
Leverage the 3927 N push force at 0.5 MPa to move heavy pallets or actuators, tuning the stroke to prevent overtravel.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX120-50 the Right Cylinder?
Choose this 100 mm bore SAIJ model when your application requires substantial thrust—3927 N at 0.5 MPa or 5497 N at 0.7 MPa. If your force requirements are lower, stepping down to an 80 mm bore drops the 0.5 MPa push force to 2513 N, whereas moving up to a 125 mm bore increases it to 6136 N. The integrated rear adjuster is ideal for product changeovers, letting you fine-tune the end-of-travel position at commissioning without fabricating external mechanical stops or replacing a fixed-stroke SAI cylinder.
When specifying a replacement, match the 100 mm bore, 120 mm stroke, 50 mm adjustment range, PT port threads, and SUS420J2 rod material. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting the FB, CA, CB, and CR foot and pivot brackets found on some standard lines. Remember that the rear screw acts only as a travel stop alongside the air cushions; it does not hold the load without live air. For true pneumatic locking, consider the SAIL or BSAI 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 SAIJ100AX120-50 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 shorten the 120 mm nominal stroke by up to 50 mm, creating a usable travel window of 70 to 120 mm. This stopper fine-tunes the retract end position but does not lock the load without continuous air pressure.
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