Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 105mm 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
- Stroke105 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-40
The AirTAC SAIJ40X105-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the effective travel by up to 40 mm. This yields a usable stroke window of 65 to 105 mm, allowing you to dial in the exact retract end-position at commissioning without adding external stops. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa.
This unit features a SUS304 stainless steel rod (option B) for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though position detection requires adding a magnet. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 105 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 SAIJ40BX105-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×105 | 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 SAIJ40BX105-40 Is Used
Machine Changeovers
Dial in the retract position from 65 to 105 mm during product size changes without swapping the physical cylinder.
End-Position Tuning
Fine-tune the exact stop point at commissioning using the rear adjuster to perfect your process timing.
Fixture Alignment
Adjust the stroke on the fly to align clamping fixtures precisely to the workpiece dimensions.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-40 the Right Cylinder?
Choose this 40 mm bore when your application requires slightly less force than the 50 mm bore (which provides 982 N push at 0.5 MPa) but more than the 32 mm bore (402 N push). The 40 mm adjustment range is selected over a fixed-stroke SAI cylinder when a machine requires variable end-stops to accommodate product changeovers. For load-holding without continuous air pressure, consider the SAIL or BSAI series instead. The 16 mm rod and M12x1.25 thread handle moderate side loads, but a stroke of 105 mm is short enough to usually operate without an external guide.
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 SAIJ40BX105-40 FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It operates at speeds between 30 and 800 mm/s.
The rear adjuster acts as a mechanical stop that shortens the nominal 105 mm stroke by up to 40 mm, providing a usable travel window of 65 to 105 mm. It requires live air to function and is not a locking device.
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