Airtac B04-SAU Standard Air Cylinder for Construction Machinery B04-SAU63X50S
The AirTAC Airtac B04-SAU Standard Air Cylinder for Construction Machinery B04-SAU63X50S is a genuine double-acting profile-type standard air cylinder with a Ø63mm bore and 50mm stroke, 3/8" 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.
- BoreØ63 mm
- Stroke50 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac B04-SAU Standard Air Cylinder for Construction Machinery B04-SAU63X50S
The AirTAC B04-SAU63X50S is a double-acting profile-type cylinder engineered for construction machinery. The B04- prefix marks this as a construction-machinery dedicated variant of the SAU63X50S, mechanically identical to the base unit with a 63mm bore and 50mm stroke. It delivers a push force of 1559 N and pull of 1402 N at 0.5 MPa. Its extruded aluminum barrel is physically shorter than an ISO 15552 cylinder of the same bore, providing a critical space advantage in tight equipment bays.
For practical sizing, plan for a safe working load of about 935 N (60% of the 0.5 MPa push figure) to account for seal friction. This equates to lifting roughly 79 kg vertically with a 2:1 safety margin. The 3/8" port and M16x1.5 rod thread handle robust flows, while the included -S piston magnet allows direct mounting of CMSG, DMSG, or EMSG sensors along the profile groove.
Airtac B04-SAU Standard Air Cylinder for Construction Machinery B04-SAU63X50S Technical Specifications
| Model | Airtac B04-SAU Standard Air Cylinder for Construction Machinery B04-SAU63X50S |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø63 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | 3/8" |
| Rod thread | M16×1.5 |
| 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 1500 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac B04-SAU Standard Air Cylinder for Construction Machinery B04-SAU63X50S
| SAU | Profile-type standard cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×50 | 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-SAU Standard Air Cylinder for Construction Machinery B04-SAU63X50S Is Used
Excavator Door Latches
Actuates heavy cab doors on earthmoving equipment, utilizing the 1559 N push force to securely swing and lock panels despite vibration.
Crane Outrigger Pins
Drives locking pins for mobile crane stabilizers where the compact profile length saves valuable space within the machinery chassis.
Loader Valve Banks
Shifts directional control valves on wheel loaders, relying on the 3/8" port for rapid actuation under high-flow conditions.
Is the Airtac B04-SAU Standard Air Cylinder for Construction Machinery B04-SAU63X50S the Right Cylinder?
When sizing this unit, compare its 1559 N push force at 0.5 MPa against the adjacent bores: a 50mm bore yields 982 N (often too light for heavy gear), while an 80mm bore provides 2513 N if your rig demands more thrust. Because this SKU features the -S magnet, it is fully ready for position sensing. For mounting, it shares identical LB foot, FA/FB flange, and CA/CB clevis accessories with the AirTAC SC series. Note that a standard cylinder cannot hold a load if air pressure drops; the adjustable 21mm end cushions only decelerate the piston near stroke end. To prevent drift on heavy construction loads, integrate an external rod lock or pilot-operated check valve.
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-SAU Standard Air Cylinder for Construction Machinery B04-SAU63X50S FAQ
This 63mm bore cylinder features a 3/8" port and M16x1.5 rod thread. It delivers 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a theoretical maximum of 318 kgf at 1.0 MPa.
The B04- prefix designates this as AirTAC's construction-machinery dedicated line, sharing the exact same physical specs as the standard SAU63X50S. It is a compact profile cylinder, shorter than an ISO 15552 unit, and uses AirTAC SC-series mounting accessories rather than an ISO footprint.
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