Airtac SAIJ40 Adjustable Cylinder SAIJ40BX110-20
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX110-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 110mm 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
- Stroke110 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX110-20
The AirTAC SAIJ40X110-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 90 to 110 mm usable travel window, allowing you to dial back the nominal 110 mm stroke by up to 20 mm during commissioning. Delivering 879 N of push force at 0.7 MPa, it bridges the gap between smaller 32 mm bores and 50 mm options.
This variant uses a SUS304 stainless steel rod for superior corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches. Remember that the rear adjuster acts only as a travel stop, not a load-holding lock.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX110-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX110-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 110 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 SAIJ40BX110-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×110 | 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 SAIJ40BX110-20 Is Used
End-Position Tuning
Fine-tune the retract end position by up to 20 mm during machine commissioning to hit exact mechanical stops without machining new spacers.
Product Changeover
Quickly adjust the travel window from 110 mm down to 90 mm when running a slightly shorter product size on the same line.
Assembly Pressing
Leverage the 879 N push force at 0.7 MPa for light-duty pressing tasks, using the rear stopper to dial in the exact crush depth.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX110-20 the Right Cylinder?
Choose this 40 mm bore when your application requires more thrust than a 32 mm bore (563 N at 0.7 MPa) but less than a 50 mm bore (1374 N). The adjustable stroke is perfect for machine setups requiring precise end-position tuning without swapping cylinders or adding external stops. Since the stroke is 110 mm, side-load risks are moderate, but external guides are recommended if heavy loads are suspended.
For an ISO 15552 replacement, match the 40 mm bore, 110 mm stroke, 20 mm adjustment, PT G1/4 ports, and the SUS304 rod material. Note that this cylinder uses the SAIJ mounting subset (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB and rear pivot options. If you need fail-safe load holding without live air pressure, consider the SAIL or BSAI series 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 SAIJ40 Adjustable Cylinder SAIJ40BX110-20 FAQ
It features a rear adjusting screw that lets you shorten the effective stroke by up to 20 mm, providing a usable travel window of 90 to 110 mm. This allows precise end-position tuning at commissioning without changing the cylinder or adding external stops.
At a standard operating pressure of 0.7 MPa, the SAIJ40X110-20 delivers 879 N of push force and 528 N of pull force. It can reach up to 1130 N push force at 0.9 MPa.
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