Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 300mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke300 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-10S
The AirTAC SAIJ40X300-10-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628N of push force at 0.5 MPa and features a 10mm adjustment range, creating a precise 290-300mm usable travel window for fine-tuning the retract end position during commissioning. This variant includes a SUS304 stainless steel rod for superior corrosion resistance and a built-in magnet for position sensing.
Because the nominal stroke is 300mm, the 16mm rod and M12x1.25 thread should be guided externally to prevent excessive side-loading. The extruded aluminum barrel includes sensor grooves on both sides, and the rear stopper simply acts as a travel limit rather than a load-holding lock. For applications requiring the load to be held without live air pressure, an external rod lock or a SAIL/BSAI cylinder is required.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | 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 SAIJ40 Adjustable Cylinder SAIJ40BX300-10S Is Used
End-Position Tuning
Dial in the exact retract distance within a 290-300mm window during machine commissioning without swapping out the entire cylinder.
Product Changeover
Quickly adjust the rear stopper by up to 10mm to accommodate slight variations in product sizes running on the same conveyor line.
Stainless Rod Actuation
Leverage the SUS304 rod for light-duty pushing tasks in environments where standard carbon steel rods face corrosion risks.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-10S the Right Cylinder?
Choose this 40mm bore when a 32mm cylinder (providing 402N push at 0.5 MPa) lacks the necessary force, but a 50mm unit (982N) would be physically oversized. The 10mm adjustable end-stop is ideal for machine setups requiring variable end positions without fabricating external stopper blocks, offering more flexibility than a fixed-stroke SAI cylinder. To match this ISO 15552 footprint exactly, specify a 40mm bore, 300mm stroke, PT tapered ports, and the -S magnet option for CMSE reed or DMSE electronic sensors.
Given the 300mm stroke, ensure adequate external guiding to support the load and protect the rod seals from side-load wear. The available mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, intentionally omitting FB, CA, CB, and CR brackets.
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 SAIJ40 Adjustable Cylinder SAIJ40BX300-10S FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. If higher pressure is applied, the push force reaches 879N at 0.7 MPa and 1130N at 0.9 MPa.
The rear adjuster screw allows you to shorten the effective stroke by up to 10mm, creating a 290-300mm usable travel window. This stopper only limits the travel end and does not lock or hold the load without continuous air pressure.
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