Airtac B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X250
The AirTAC B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X250 is a genuine double-acting profile-type standard air cylinder with a Ø40mm bore and 250mm 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
- Stroke250 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-SAUD40X250
The B04-SAUD40X250 is an AirTAC double-acting, double-rod profile cylinder. The B04- prefix marks it as the construction-machinery dedicated variant of the SAUD40X250, mechanically identical to the base model. A rod exits both ends of the hard-anodized aluminum extruded barrel, meaning both faces use the rod-side area. This yields equal force both ways, delivering 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa. The unit features a 1/4" port, an M12x1.25 rod thread, and adjustable 21 mm cushions at each end.
Because the extruded profile omits external rods, it is shorter than an ISO 15552 cylinder of the same bore. The twin rods provide anti-rotation guidance and can drive two tools simultaneously. Note that this SKU lacks a magnet, so it cannot accept CMSG or DMSG sensors. For high-temperature heavy equipment needs, Viton H seals raise the operating range to 0-150 C.
Airtac B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X250 Technical Specifications
| Model | Airtac B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X250 |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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-SAUD40X250
| SAU | Profile-type standard cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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-SAUD40X250 Is Used
Excavator Linkage
Drives synchronized dual covers on heavy equipment cabins with equal push and pull force, resisting twist during off-axis dirt loads.
Crusher Feed Gate
Opens and closes a dual-tool rock hopper gate where the back rod simultaneously trips a mechanical limit valve in dusty sites.
Concrete Mold Clamp
Holds precast forms with non-rotating anti-twist guidance, keeping the mold faces parallel during aggressive vibration pouring.
Is the Airtac B04-SAUD Construction Machinery Dedicated Standard Cylinder B04-SAUD40X250 the Right Cylinder?
Size this 40 mm bore against its neighbors: the 32 mm bore yields 345 N both ways, while the 63 mm bore provides 1402 N both ways at 0.5 MPa. Choose this double-rod architecture when your construction mechanism requires strict anti-rotation accuracy, synchronized twin-tool actuation, or needs a back rod to trip an external switch. Mounting is limited to Basic, FA flange, and LB foot styles, matching the AirTAC SC series. Since this 250 mm stroke exceeds 300 mm? No, but for any stroke approaching 300 mm, always use external guide rails to prevent side-load binding. This SKU has no -S magnet, so switch sensing is impossible without modifying the piston.
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-SAUD40X250 FAQ
The B04- prefix designates this as the construction-machinery dedicated variant of the SAUD40X250, sharing identical specs. Force is equal both ways because rods protrude from both ends: 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.
No, a plain double-rod cylinder drifts without live air; the 21 mm cushions only decelerate near stroke end and act as no brake. For vertical load holding on construction rigs, install an external rod lock or pilot-operated check valve. Also, this SKU lacks a magnet for sensors.
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Covers non-human-caused product damage.
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