This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD100X25 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD100X25 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-SUD100X25
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X25 is a double-acting profile-type standard cylinder with a Ø100mm bore and 25mm stroke, 1/2" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD100X25, which matches its bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke25 mm
- Port size1/2"
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAUD100X25
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X25
The AirTAC B04-SUD100X25 is a discontinued double-acting double-rod profile cylinder. The B04- prefix marks this as the construction-machinery dedicated variant of the base SUD100X25, mechanically identical with a 100mm bore, 25mm stroke, 1/2" port, and M20x1.5 rod thread. Because a rod exits both ends on one piston, push and pull force are equal at 3681N @0.5MPa, 5153N @0.7MPa, and 6626N @0.9MPa. The exact drop-in replacement is the SAUD100X25, retaining the same profile body, bore, and SC-series FA/LB mounting.
This cylinder yields a safe working load of roughly 2209N (60% of the 0.5MPa force) and a vertical lift capacity of about 188kg with a 2:1 margin. The twin rods prevent rotation and let the back rod drive a second tool. Without a -S suffix, this SKU lacks a magnet and cannot carry sensors. Note that air cushions only decelerate the piston near stroke end; an external rod lock is required to hold loads safely.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X25 Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X25 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD100X25 |
| Bore size | Ø100 mm |
| Stroke | 25 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-SAUD100X25 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-SAUD100X25 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-SUD100X25
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×25 | 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-SUD100X25 Is Used
Excavator Linkage Actuation
Drives synchronized heavy-equipment covers on construction machinery where equal push and pull force prevents linkage binding.
Concrete Mold Ejection
Uses the twin rods to push and pull a heavy mold carriage without rotational drift, ensuring precise concrete panel formation.
Crusher Feeder Gate
Regulates aggregate flow on mobile crushers, using the back rod to mechanically signal gate position without sensors.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X25 with the B04-SAUD100X25
To replace the discontinued B04-SUD100X25, select the SAUD100X25 drop-in equivalent, which preserves the 100mm bore, 25mm stroke, 1/2" port, and FA/LB mounting. Size both directions by checking the equal-both-ways force: if 3681N at 0.5MPa is insufficient, step up to a larger bore, as this double-rod design intentionally matches push and pull areas. Choose a double-rod cylinder when your mechanism requires anti-rotation stability or needs to drive two tools from one piston. This non-magnetic SKU cannot accept sensors; if sensing is needed on the SAUD replacement, use current CMSG/DMSG/EMSG switches instead of the legacy CS1-B/DS1-B. For strokes of 300mm or longer, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD100X25
- ✓ 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-SUD100X25 FAQ
Yes, the B04-SUD100X25 is discontinued. The exact drop-in replacement is the SAUD100X25. The B04- prefix simply marks it as the construction-machinery dedicated variant of the base SUD100X25, so the SAUD matches it exactly on bore, stroke, force, and 1/2" port.
Because it is a double-rod cylinder, force is equal both ways: 3681N at 0.5MPa, 5153N at 0.7MPa, and 6626N at 0.9MPa. The bore is 100mm and the air port is 1/2". The cushion only decelerates the piston; it does not hold the load on air loss.
Related AirTAC SAU Cylinders
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