This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD80X800 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD80X800 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-SUD80X800
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X800 is a double-acting profile-type standard cylinder with a Ø80mm bore and 800mm stroke, 3/8" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD80X800, which matches its bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke800 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAUD80X800
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X800
The B04-SUD80X800 is an AirTAC double-acting profile cylinder where the B04- prefix designates a construction-machinery dedicated variant, mechanically identical to the standard SUD80X800. A piston rod exits 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. The extruded aluminium profile barrel is shorter than an ISO 15552 cylinder of the same bore. It features a 25 mm rod, M20x1.5 rod thread, and a 3/8" port. This SUD model is discontinued and replaced by the SAUD80X800.
Because the rear rod can carry a sensor cam or drive a second tool simultaneously, the design prevents rotation without external guides. With a 0.5 MPa input, the safe working load is roughly 1361 N, translating to a vertical lift capacity of about 116 kg with a 2:1 margin. Note this SKU lacks a magnet and cannot accept switches. The air cushion only decelerates near stroke end; it does not hold loads on air loss, requiring an external rod lock for vertical holding.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X800 Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X800 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD80X800 |
| Bore size | Ø80 mm |
| Stroke | 800 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-SAUD80X800 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-SAUD80X800 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-SUD80X800
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×800 | 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-SUD80X800 Is Used
Excavator Actuation
Drives synchronized gripping arms on heavy equipment where equal push and pull force prevents uneven jaw closure.
Material Transfer
Simultaneously pushes two parallel conveyor diverter plates from opposite ends, ensuring perfectly aligned material routing.
Crusher Clearance
Adjusts jaw crusher gap settings in aggregate machinery, using the dual rods to maintain parallel alignment under high vibration.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD80X800 with the B04-SAUD80X800
To replace the discontinued B04-SUD80X800, use the drop-in SAUD80X800, which matches the 80 mm bore, 800 mm stroke, 3/8" port, and FA/LB mounting. Size both directions by checking the equal-both-ways force against your load, stepping to neighbouring bores if more power is needed. A double rod is right when you need anti-rotation or simultaneous dual-tool driving. For the 800 mm stroke, use external guides to prevent rod bending under side loads. Because this non-magnetic SKU cannot take sensors, and the SAUD upgrade shifts from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG sensors, plan to add external sensing if required.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD80X800
- ✓ 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-SUD80X800 FAQ
Yes, it is discontinued. The B04- prefix marks it as a construction-machinery dedicated variant of the base SUD80X800. The exact drop-in replacement is the SAUD80X800, sharing the same 80 mm bore, 800 mm stroke, 3/8" port, and FA/LB mounting.
Being 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. This specific SKU has no magnet and cannot accept switches. The SAUD replacement uses current CMSG/DMSG/EMSG sensors.
Related AirTAC SAU Cylinders
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