Airtac B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X25S
The AirTAC B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X25S is a genuine double-acting profile-type standard air cylinder with a Ø40mm bore and 25mm 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
- Stroke25 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-SAUD40X25S
The B04-SAUD40X25S is a double-acting, double-rod profile cylinder. The B04- prefix marks this as AirTAC's construction-machinery dedicated variant of the SAUD40X25S, mechanically identical to the base model. Because a rod exits both ends, the push and pull forces are equal at 528 N each way at 0.5 MPa. The extruded aluminum barrel makes it shorter than an ISO 15552 cylinder of the same bore. It features a 1/4" port and an M12x1.25 rod thread.
This unit includes a built-in piston magnet (-S) for CMSG, DMSG, or EMSG switches. The twin-rod design provides anti-rotation guidance and allows a sensor cam to ride on the back rod. Standard seals handle -20 to +70 C, while a Viton H option extends this to 0-150 C.
Airtac B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X25S Technical Specifications
| Model | Airtac B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X25S |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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-SAUD40X25S
| SAU | Profile-type standard cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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-SAUD40X25S Is Used
Excavator Panel Pusher
Equal bidirectional force drives and retracts a panel alignment tool on heavy machinery without stroke variance.
Crane Component Clamp
Twin-rod anti-rotation keeps the clamping jaw stable during vibration, while the back rod trips a DMSG sensor.
Loader Valve Test Rig
Compact profile fits tight equipment cells, cycling a test fixture at 30-800 mm/s with Viton H high-temp seals.
Is the Airtac B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X25S the Right Cylinder?
When sizing this double-rod unit, consider the neighboring bores: the 32 mm bore yields 345 N each way at 0.5 MPa, while the 63 mm bore provides 1402 N. Choose this 40 mm model when you need synchronized twin-tool driving or strict anti-twist guidance on heavy equipment. Mounting is limited to Basic, FA flange, and LB foot styles, matching the AirTAC SC series. The -S magnet enables position sensing. Because the 25 mm stroke is short, side-load stress is minimal, but always guide external loads to prevent binding. A plain cylinder drifts on air loss; use an external rod lock for secure load holding.
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-SAUD40X25S FAQ
The B04- prefix denotes the construction-machinery dedicated variant of the SAUD40X25S, sharing identical specs. Force is equal both ways: 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa. It uses a 1/4" port and M12x1.25 rod thread.
The dual rods prevent rotation and allow mounting a sensor cam on the back end. The -S suffix means it has a magnet for CMSG, DMSG, or EMSG switches. Note that the air cushion only decelerates; it does not hold the load without live air.
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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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