Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 300mm 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
- Stroke300 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-20
The AirTAC SAIJ100X300-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 300 mm stroke that can be fine-tuned down by up to 20 mm, creating a precise 280-300 mm usable travel window for exact end-position calibration. Delivering a robust 5497 N push force at 0.7 MPa, it is built to handle heavy loads in demanding pneumatic setups.
This model features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads with a G1/2 connection. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to easily mount CMSE reed or DMSE electronic switches. The rear stopper simply sets the travel end-point, meaning the cylinder still requires live air to hold its load.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 300 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 SAIJ100BX300-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×300 | 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 SAIJ100BX300-20 Is Used
Product Changeover
Dial in the 280-300 mm travel window during format size changes on a packaging line, avoiding the need to physically swap out the entire cylinder.
End-Stop Calibration
Fine-tune the final retracted position of a heavy press tool during commissioning, using the rear screw to perfect the kinematics without external stoppers.
Material Handling
Drive heavy pallets or workpieces using the 5497 N push force, relying on the adjustable end-stop to accommodate varying package dimensions.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-20 the Right Cylinder?
Choose this 100 mm bore when you need substantial thrust, such as the 5497 N push force at 0.7 MPa, which easily outmuscles a 63 mm bore cylinder that provides 2182 N under the same pressure. The adjustable 280-300 mm window is ideal for machine setups requiring product changeovers without swapping hardware. If you need true load-holding without continuous air pressure, a plain SAIJ is insufficient as the rear adjuster is a stop and not a lock; you should look at the SAIL or BSAI series instead.
For an exact ISO 15552 replacement, match the 100 mm bore, 300 mm stroke, 20 mm adjustment code, PT port threads, and your required mounting style. Note that SAIJ supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. Because this unit has a 300 mm stroke, the 25 mm diameter SUS304 rod will experience leverage forces under side loading, so an external guide rail should be used to prevent premature seal wear.
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 SAIJ100BX300-20 FAQ
At a standard operating pressure of 0.7 MPa, this 100 mm bore cylinder provides a push force of 5497 N and a pull force of 3681 N. It can reach a maximum push force of 7068 N at 0.9 MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from the 300 mm nominal stroke down to 280 mm. It only sets the end position and does not lock the load without live air pressure.
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