Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-30 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 SAIJ40BX105-30
The AirTAC SAIJ40X105-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 105 mm stroke that can be fine-tuned down by up to 30 mm, creating a precise 75-105 mm usable travel window. In the 40 mm bore class, it delivers 879 N of push force at 0.7 MPa, making it well-suited for moderate-load positioning tasks.
This unit is configured with a SUS304 stainless steel rod (option B) for superior corrosion resistance and features PT tapered port threads. The rear adjuster acts strictly as a mechanical stop to dial in the retract end position during commissioning without adding external stops. It is not a locking device, so load holding without live air requires a SAIL or BSAI variant.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-30 |
|---|---|
| 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 SAIJ40BX105-30
| 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 SAIJ40BX105-30 Is Used
Changeover Adjustment
Dial in the 75-105 mm retract stop during product size changeovers without swapping the cylinder or adding external shims.
End-Position Tuning
Fine-tune the final resting position at machine commissioning to achieve precise mechanical alignment using the rear screw.
Corrosion-Resistant Actuation
Leverage the SUS304 stainless steel rod for moderate-force actuation in environments where moisture or contamination is a concern.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-30 the Right Cylinder?
Select this 40 mm bore model when an application requires exact end-position tuning on the fly, stepping up from a 32 mm bore (563 N push at 0.7 MPa) for greater thrust. The adjustable 75-105 mm window is ideal for product changeovers, whereas a fixed-stroke SAI cylinder would require physical shimming or replacement. Because the stroke is 105 mm, side-loading is minimal, but external guidance is still recommended for heavy off-center loads.
For a direct ISO 15552 replacement match, ensure you specify the 40 mm bore, 105 mm nominal stroke, 30 mm adjustment range, PT port threads, SUS304 rod material, and no magnet. Remember that the integrated air cushions and rear stopper only decelerate the load; they cannot hold position without sustained air pressure.
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 SAIJ40BX105-30 FAQ
At 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 738 N of pull force. At 0.5 MPa, it delivers 628 N push and 528 N pull.
The rear adjuster acts as a mechanical stop that lets you trim the effective travel back by up to 30 mm. This creates a usable stroke window of 75 to 105 mm, allowing you to set the exact retract end position without changing the cylinder.
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