This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD80X900 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD80X900 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-SUD80X900
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X900 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-SAUD80X900, which matches its bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke900 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAUD80X900
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X900
The B04-SUD80X900 is an AirTAC construction-machinery dedicated double-rod profile cylinder; the B04- prefix denotes heavy-equipment application without altering the base SUD80X900 specs. Discontinued and superseded by the drop-in SAUD80X900, it features an extruded aluminum profile barrel with a rod exiting both ends, yielding equal push and pull force of 2268 N at 0.5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. It uses a 3/8" port, M20x1.5 rod thread, and 28 mm adjustable cushions.
Because both faces use the rod-side area, force is identical in both directions, which prevents rod surging and allows the back rod to drive a second tool. As this SKU lacks a magnet (-S), it cannot accept legacy CS1-B/DS1-B switches (the SAUD uses CMSG/DMSG/EMSG). At 0.5 MPa, the safe working load is roughly 1361 N, enabling a vertical lift of about 116 kg with a 2:1 margin. Note that air cushions only decelerate the piston; an external rod lock is required to hold loads.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X900 Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X900 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD80X900 |
| 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-SAUD80X900 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-SAUD80X900 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-SUD80X900
| 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-SUD80X900 Is Used
Excavator Linkage
Drives synchronized heavy-equipment covers on construction machinery where equal push/pull force prevents linkage binding.
Dual-Tool Press
Uses the rear rod extension to actuate a secondary forming tool simultaneously with the primary front rod operation.
Anti-Rotation Clamp
Secures heavy fabricated frames during machining, leveraging the double-rod geometry to resist rotational torque.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X900 with the B04-SAUD80X900
To replace this discontinued cylinder, specify the SAUD80X900, which matches the 80 mm bore, 900 mm stroke, 3/8" port, and FA/LB mounting. When sizing both ways, verify your force needs against the equal 2268 N @0.5 MPa output, stepping to neighbouring bores if higher capacity is required. A double rod is ideal when anti-rotation or dual-tool driving is needed. For the 900 mm stroke, external guides are recommended to prevent rod bending under side loads. This non-magnetic SKU cannot take sensors, but upgrading to an -S SAUD allows modern CMSG/DMSG/EMSG switches.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD80X900
- ✓ 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-SUD80X900 FAQ
Yes, it is discontinued. The exact drop-in replacement is the SAUD80X900. The B04- prefix simply marks the construction-machinery dedicated variant; mechanically it is identical to the base SUD80X900, sharing the same 80 mm bore, 900 mm stroke, 3/8" port, and FA/LB mounting.
Force is equal both ways: 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. The safe working load is approximately 1361 N, allowing a vertical lift of about 116 kg with a 2:1 margin. Air cushions only decelerate near stroke end; use an external rod lock for load holding.
Related AirTAC SAU Cylinders
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