This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD80X900S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD80X900S 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-SUD80X900S
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X900S is a double-acting profile-type standard cylinder with a Ø80mm bore and 900mm stroke, 3/8" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD80X900S, which matches its bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke900 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAUD80X900S
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X900S
The AirTAC B04-SUD80X900S is a double-acting, double-rod profile cylinder where a rod exits both ends on one piston, yielding equal push and pull force of 2268 N at 0.5 MPa, 3175 N at 0.7 MPa, and 4082 N at 0.9 MPa. The leading B04- prefix marks this as AirTAC's construction-machinery dedicated variant of the SUD80X900S, mechanically identical to the base model with an extruded aluminium profile barrel, 3/8" port, M20x1.5 rod thread, and 28 mm adjustable cushions. This legacy model is discontinued.
The exact drop-in replacement is the SAUD80X900S, which retains the same bore, stroke, force, port, and FA/LB mounting. The double-rod design provides inherent anti-rotation properties and allows the back rod to carry a sensor cam. With a 2268 N force at 0.5 MPa, the computed safe working load is approximately 1361 N, translating to a vertical lift capacity of about 116 kg with a 2:1 margin. The SAUD upgrade transitions from legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X900S Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X900S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD80X900S |
| Bore size | Ø80 mm |
| Stroke | 900 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-SAUD80X900S 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-SAUD80X900S 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-SUD80X900S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×900 | 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-SUD80X900S Is Used
Excavator Boom Actuation
Drives dual-tool mechanisms on heavy equipment where equal both-ways force and inherent anti-rotation are critical for precise boom positioning.
Crane Load Sync
Uses the back rod to carry a sensor cam for closed-loop feedback on construction machinery, ensuring synchronized lifting without rotational drift.
Heavy Equipment Gates
Pushes and pulls heavy mechanical gates or diverters on mobile rock crushers, relying on the 3175 N at 0.7 MPa equal force for reliable cycling.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X900S with the B04-SAUD80X900S
To replace the discontinued B04-SUD80X900S, specify the SAUD80X900S as a direct drop-in, keeping the 80 mm bore, 900 mm stroke, 3/8" port, and FA/LB mounting identical. When sizing both ways, verify the equal push/pull force of 2268 N at 0.5 MPa meets your requirement, or step to neighbouring bores if more force is needed. A double rod is right when you need anti-rotation, dual-tool driving, or a back-rod sensor cam. Because this unit has a -S magnet, plan a sensor change from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG. For the 900 mm stroke, add external guides to prevent rod bending and side-load damage. Note that air cushions only decelerate; use an external rod lock for load holding.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD80X900S
- ✓ 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-SUD80X900S FAQ
Yes, the B04-SUD80X900S is discontinued. The B04- prefix simply marks it as the construction-machinery dedicated variant of the SUD80X900S, mechanically identical to the base model. The exact drop-in replacement is the SAUD80X900S, which matches the 80 mm bore, 900 mm stroke, 3/8" port, and FA/LB mounting.
Because it is a double-rod cylinder, force is equal both ways: 2268 N at 0.5 MPa, 3175 N at 0.7 MPa, and 4082 N at 0.9 MPa. The air port is 3/8". The safe working load is approximately 1361 N, allowing a vertical lift of about 116 kg with a 2:1 margin.
Related AirTAC SAU Cylinders
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