Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 400mm 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
- Stroke400 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-100
The AirTAC SAIJ40X400-100 is a double-acting, single-rod ISO 15552 profile cylinder engineered with a rear stroke adjuster, providing a usable travel window of 300 to 400 mm. Delivering 628 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance and features PT tapered port threads.
This 40 mm bore actuator utilizes an extruded aluminum barrel with sensor grooves on both sides. The rear stopper mechanism allows precise end-position tuning during commissioning without swapping components, while the robust M12x1.25 rod thread handles high side loads effectively.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 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 SAIJ40BX400-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×400 | 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 SAIJ40BX400-100 Is Used
Variable End-Stop Tuning
Dial in precise retraction depths between 300 and 400 mm during machine commissioning to accommodate varying product sizes without external hardware.
Product Changeover
Quickly adjust the stroke window on packaging lines when switching between different carton lengths, minimizing downtime and maximizing line flexibility.
Corrosion-Resistant Actuation
Leverage the SUS304 stainless steel rod in light manufacturing environments where moisture or minor chemicals require enhanced material resistance.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-100 the Right Cylinder?
Select this 40 mm bore model when an application requires a 628 N push force at 0.5 MPa; if your setup needs less force, step down to the 32 mm bore (402 N), or move up to the 50 mm bore (982 N) for heavier demands. The 100 mm adjustment range is ideal for product-size changeovers, allowing operators to dial in the exact 300-400 mm travel without adding external stops.
Because this cylinder features a 400 mm stroke, an external guide is recommended to support the load and mitigate rod side-loading over extended travel. For holding loads without live air pressure, note that the rear adjuster acts only as a travel stop, not a lock; consider an AirTAC SAIL or BSAI cylinder for true pneumatic locking. To match this ISO 15552 footprint, specify the 40 mm bore, 400 mm stroke, PT ports, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting style.
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 SAIJ40BX400-100 FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It can reach a maximum push force of 1130 N at 0.9 MPa.
The rear adjuster acts as a mechanical stop that allows you to shorten the effective travel from the nominal 400 mm down to 300 mm. This creates a flexible 300-400 mm window for fine-tuning end positions, though it does not lock the load without live air pressure.
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