This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD100X125S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD100X125S 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-SUD100X125S
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X125S is a double-acting profile-type standard cylinder with a Ø100mm bore and 125mm stroke, 1/2" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD100X125S, which matches its bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke125 mm
- Port size1/2"
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAUD100X125S
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X125S
The AirTAC B04-SUD100X125S is a discontinued double-acting double-rod profile cylinder. The B04- prefix marks this as the construction-machinery dedicated variant of the SUD100X125S, mechanically identical to the base model with a 100mm bore, 125mm stroke, and 1/2" port. A rod exits both ends on one piston, meaning both faces use the rod-side area and push and pull force are equal both ways (3681N at 0.5MPa). It is replaced by the drop-in SAUD100X125S, which retains the exact bore, stroke, force, port, and FA/LB mounting.
Because the second rod drives a sensor cam and resists rotation, double-rod architecture is ideal for heavy-equipment builders. The legacy CS1-B/DS1-B sensors on this SUD are superseded by CMSG/DMSG/EMSG switches on the SAUD. For sizing, the safe working load is roughly 2209N (about 60% of the 3681N at 0.5MPa figure), yielding a vertical lift capacity of approximately 188kg with a 2:1 margin. Note that the air cushion only decelerates near stroke end; an external rod lock is required to hold loads.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X125S Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X125S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD100X125S |
| Bore size | Ø100 mm |
| Stroke | 125 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-SAUD100X125S 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-SAUD100X125S 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-SUD100X125S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×125 | 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-SUD100X125S Is Used
Excavator Linkage
Synchronizes dual-tool actuation on heavy machinery arms where equal push and pull force is mandatory for balanced lifting.
Crane Grippers
Provides anti-rotation stability for gripping heavy materials, using the back rod to carry a sensor cam for position feedback.
Paving Equipment
Drives compact profile assemblies in road construction machinery, fitting tight spaces while delivering 3681N of equal force.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X125S with the B04-SAUD100X125S
To replace the B04-SUD100X125S, order the drop-in SAUD100X125S, keeping the bore, stroke, and FA/LB mounting identical. When sizing both ways, verify that the equal push/pull force of 3681N at 0.5MPa meets your load, or step to a neighbouring bore if more capacity is needed. A double rod is right when you need anti-rotation or must drive two tools simultaneously. If your SUD used the -S magnet, upgrade the legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors. For strokes of 300mm or longer, carefully manage side-load alignment to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD100X125S
- ✓ 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-SUD100X125S FAQ
Yes, this construction-machinery dedicated variant of the SUD100X125S is discontinued. The exact drop-in replacement is the SAUD100X125S, which matches the bore, stroke, 1/2" port, and equal both ways force. The B04- prefix is an industry designation only and does not change physical specs.
The 100mm bore has a 1/2" port and generates equal force both ways: 3681N at 0.5MPa, 5153N at 0.7MPa, and 6626N at 0.9MPa. Because it is double-rod, the push and pull values are identical. The safe working load is about 2209N.
Related AirTAC SAU Cylinders
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