This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD100X400S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD100X400S 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-SUD100X400S
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X400S is a double-acting profile-type standard cylinder with a Ø100mm bore and 400mm stroke, 1/2" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD100X400S, which matches its bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke400 mm
- Port size1/2"
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAUD100X400S
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X400S
The AirTAC B04-SUD100X400S is a double-acting, double-rod profile cylinder. The B04- prefix marks this as a construction-machinery dedicated variant of the base SUD100X400S, mechanically identical with a 100mm bore, 400mm stroke, 1/2" port, and M20x1.5 rod thread. Because a rod exits both ends on one piston, push and pull force are equal both ways: 3681N at 0.5MPa, 5153N at 0.7MPa, and 6626N at 0.9MPa. This model is discontinued and the exact drop-in replacement is the SAUD100X400S.
The SAUD replacement keeps the same profile body, bore, stroke, and FA/LB mounting, but upgrades sensing to current CMSG/DMSG/EMSG switches (this SUD used legacy CS1-B/DS1-B). The dual-rod design provides anti-rotation and lets the back rod carry a sensor cam. For buyers, the safe working load is about 2209N (60% of the 0.5MPa force), yielding a vertical lift capacity of roughly 188kg with a 2:1 margin. Note that air cushions only decelerate near stroke end; an external rod lock is required for load holding.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X400S Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X400S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD100X400S |
| Bore size | Ø100 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | 1/2" |
| 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, 29 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The B04-SAUD100X400S carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The B04-SAUD100X400S 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-SUD100X400S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×400 | 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-SUD100X400S Is Used
Excavator Linkage Actuation
Drives dual-tool mechanisms on heavy equipment where equal push and pull force is required to handle massive structural loads without rotational play.
Crusher Feed Control
Regulates material flow in construction-machinery plants, using the back rod to carry a sensor cam for precise position feedback in harsh environments.
Heavy Press Ejection
Ejects dense components from molding equipment, utilizing the 3681N safe working load and anti-rotation properties to prevent binding during long 400mm strokes.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X400S with the B04-SAUD100X400S
To replace the discontinued B04-SUD100X400S, use the SAUD100X400S drop-in. It matches the 100mm bore, 400mm stroke, 1/2" port, and FA/LB mounting. When sizing both ways, verify the equal force of 3681N at 0.5MPa meets your load, or step to a larger bore if needed. Choose a double-rod cylinder when you need anti-rotation or must drive two tools simultaneously. The -S sensor suffix means upgrading from legacy CS1-B/DS1-B to CMSG/DMSG/EMSG sensors. For this 400mm stroke, add external guides to prevent rod bending under side loads. Mounting is compatible with the AirTAC SC series only.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD100X400S
- ✓ 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-SUD100X400S FAQ
Yes, the B04-SUD100X400S is discontinued. The B04- prefix simply marks it as a construction-machinery dedicated variant of the SUD100X400S. The exact drop-in replacement is the SAUD100X400S, which shares the same 100mm bore, 400mm stroke, 1/2" port, and FA/LB mounting, but uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
Force is equal both ways because the rod exits both ends: 3681N at 0.5MPa, 5153N at 0.7MPa, and 6626N at 0.9MPa. The computed safe working load is about 2209N (60% of the 0.5MPa figure), allowing a vertical lift of roughly 188kg 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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