Airtac B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X400S
The AirTAC B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X400S is a genuine double-acting profile-type standard air cylinder with a Ø40mm bore and 400mm stroke, 1/4" air ports and adjustable end cushioning. Its hard-anodized aluminum-profile barrel is shorter than an ISO 15552 cylinder of the same bore, and it shares SC-series mounting accessories.
- BoreØ40 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X400S
The B04-SAUD40X400S is an AirTAC double-acting, double-rod profile cylinder. The B04- prefix marks this as the construction-machinery dedicated variant of the SAUD40X400S, mechanically identical to the base model. A 16mm rod exits both ends of the hard-anodized aluminum barrel, meaning push and pull forces are equal at 528 N each way at 0.5 MPa. This extruded profile body is noticeably shorter than an ISO 15552 cylinder of the same bore.
Because the rod protrudes at the rear, you can mount a switch cam directly on it for end-of-stroke signaling. The -S suffix indicates a built-in piston magnet for CMSG, DMSG, or EMSG sensors. The 1/4" port and M12x1.25 rod thread handle speeds of 30-800 mm/s.
Airtac B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X400S Technical Specifications
| Model | Airtac B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X400S |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| 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, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAU series datasheet. Confirm against the product label before installation. Thread options: PT (blank) / G (BSPP). A high-temperature seal (0-150 °C) is available.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 528 N | 528 N |
| 0.7 MPa | 739 N | — |
| Max (@1.0 MPa) | 108 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X400S
| SAU | Profile-type standard cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×400 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAU-family variants: SAUD (double rod), SAUJ (adjustable stroke), SAUF (with built-in solenoid valve), and SAU-S with built-in magnet. Seals: TPU (blank) / Viton H / NBR N. Sensor switches: CMSG / DMSG / EMSG.
Where the Airtac B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X400S Is Used
Excavator Panel Pusher
Drives cab sheet metal panels on heavy equipment lines with equal push and pull force, preventing twist during forming.
Twin-Tool Actuation
Carries opposing gripper jaws on both rod ends to load structural components into welding fixtures simultaneously.
Rear-Cam Positioning
Uses the back rod extension to trip an external limit switch in dusty construction-machinery environments where magnetic sensors fail.
Is the Airtac B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X400S the Right Cylinder?
When sizing this 40mm bore, step up to the 50mm bore for 825 N, or down to the 32mm bore for 345 N, both equal in both directions. A double-rod design is the right call when you need anti-rotation guidance, synchronized twin-tool driving, or back-end sensing. Mounting is limited to Basic, FA flange, and LB foot styles, matching the AirTAC SC series. The -S magnet enables electronic or reed sensing. Because the stroke is 400mm, external guides are recommended to prevent rod bending under side loads.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/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 — same as SC).
- check Installation by qualified personnel per AirTAC docs.
Airtac B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X400S FAQ
It features a 40mm bore with a 1/4" port. Because it is a double-rod cylinder, the force is equal both ways: 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa. The B04- prefix simply denotes the construction-machinery dedicated variant.
No, a plain double-rod cylinder drifts without live air; the adjustable 21mm cushions only decelerate near stroke ends. For vertical load holding, install an external rod lock or pilot-operated check valve.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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