This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD80X50S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD80X50S in place of this model. The SAU replacement uses the same profile body, bore, stroke, force and SC-series mounting. It moves to the current CMSG / DMSG / EMSG sensor switches (the SU used CS1-B / DS1-B) and adds the SAUF valve-integrated option.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X50S
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X50S is a double-acting profile-type standard cylinder with a Ø80mm bore and 50mm stroke, 3/8" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD80X50S, which matches its bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke50 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAUD80X50S
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X50S
The B04-SUD80X50S is an AirTAC double-acting profile cylinder where the B04- prefix designates the construction-machinery dedicated variant of the base SUD80X50S, sharing identical mechanics. A rod exits both ends of the piston, meaning push and pull force are equal at 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. The extruded aluminium profile barrel is more compact than an ISO 15552 cylinder. This SUD model is discontinued and the exact drop-in replacement is the SAUD80X50S.
The 80mm bore uses a 25mm rod, M20x1.5 rod thread, and a 3/8 inch port. Because force is equal both ways, the back rod can carry a sensor cam or drive a second tool without force loss. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B switches; the SAUD replacement uses current CMSG/DMSG/EMSG sensors. For sizing, the safe working load is roughly 1361 N (60 percent of the 2268 N @0.5 MPa figure), yielding a vertical lift capacity of about 116 kg with a 2:1 margin.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X50S Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X50S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD80X50S |
| Bore size | Ø80 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | 3/8" |
| Rod thread | M20×1.5 |
| 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, 28 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The B04-SAUD80X50S carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The B04-SAUD80X50S produces the same force from the same bore — a true drop-in on output. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X50S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SU-family variants: SUD (double rod), SUJ (adjustable stroke) — each maps to its SAU equivalent (SUD→SAUD, SUJ→SAUJ). The current SAU line adds the SAUF valve-integrated option.
Where the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X50S Is Used
Excavator Linkage Actuation
Drives synchronized dual-tool mechanisms on heavy equipment where equal push and pull force is required to handle structural components without deflection.
Crusher Feed Control
Regulates material flow in construction-machinery crushers using the back rod to mount a sensor cam, ensuring precise positioning in dusty environments.
Paver Synchronized Gating
Operates dual gating valves on asphalt pavers where the double-rod design prevents rotation and maintains balanced force during bidirectional material routing.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X50S with the B04-SAUD80X50S
To replace the discontinued B04-SUD80X50S, order the SAUD80X50S drop-in upgrade, which preserves the 80mm bore, 50mm stroke, 3175 N equal-both-ways force @0.7 MPa, 3/8 inch port, and FA/LB mounting. When sizing both ways, check the 63mm bore (1962 N @0.7 MPa) or 100mm bore (5153 N @0.7 MPa) to match your force requirements. A double-rod cylinder is correct when you need anti-rotation stability or equal drive force in both directions. If your SUD used -S sensors, note that the SAUD requires CMSG/DMSG/EMSG switches instead of the legacy CS1-B/DS1-B. For any stroke >=300, verify the side-load rating to prevent guide bushing wear. A plain cylinder does not hold loads on air loss; use an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD80X50S
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S): sensor family CS1-B → CMSG
- ✓ Mounting reused (FA/FB/CA/CB/LB)
- ✓ Need a built-in valve? → SAUF
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X50S FAQ
Yes, the B04-SUD80X50S is discontinued. The B04- prefix marks it as the construction-machinery dedicated variant of the SUD80X50S. The exact drop-in replacement is the SAUD80X50S, which matches the 80mm bore, 50mm stroke, 3/8 inch port, and FA/LB mounting, but upgrades the sensors to CMSG/DMSG/EMSG.
Because it is a double-rod cylinder, force is equal both ways: 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. The 80mm bore uses a 3/8 inch port, a 25mm rod, and an M20x1.5 rod thread. The air cushion decelerates the load but does not hold it on air loss; use an external rod lock for held loads.
Related AirTAC SAU Cylinders
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